Corvus systems Mirror Server Manager'S Manual Download

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Summary of Contents for Mirror Server

Page 1: ... CORVUS SYSTEMS MIRROR SERVER MANAGER S GUIDE ...

Page 2: ...PPING MATERIALS MUST BE USED If this product is delivered by mail you agree to insure the product or assume the risk of loss or damage in transit to prepay shipping charges to the warranty service location and to use the original shipping container Contact Corvus systems or write to Corvus customer Service 2100 Corvus Drive San Jose CA 95124 prior to shipping equipment ALL EXPRESS AND IMPLIED WARR...

Page 3: ...Part Number Release Date Revision A 7100 06601 01 September 1984 MIRROR SERVER MANAGER S GUIDE ...

Page 4: ...cument may not in whole or in part be copied photocopied reproduced translated or reduced to any electronic medium or machine readable form without prior consent in writing from Corvus Systems Inc 2100 Corvus Drive San Jose CA 95124 Telephone 408 559 7000 TELEX 278976 c Copyright 1984 by Corvus Systems Inc All rights reserved IBM R is a trademark of International Business Machines Corp MS TM DOS i...

Page 5: ... Installinq a Network Tap Box 7 connectinq the Mirror Server to the Network 10 Connectinq the VCR to the Mirror server 14 Copyinq the Software to the Drive 16 Copyinq the Boot Diskette 19 Chapter z overview of Network Backup 21 Chapter 31 Creatinq a Transfer Tabla 25 Building a Table 25 Drive Transfer 27 Volume Transfer 28 Block Transfer 28 Listinq a Table 29 Savinq a Table 30 Table of Contents 71...

Page 6: ...dentifying a Tape Image 51 Listing a Tape Directory 55 Chapter 7 A Sample Session 59 Enter the Mirror Server Program 59 From Constellation II 59 From the Bootable Diskette 61 Build the Transfer Table 62 List the Transfer Table 66 save the Transfer Table 67 Back Up the Data 68 Verify the Backup 73 Identify the Image 76 Restore the Data 80 Table of contents 7100 05279 ...

Page 7: ...r Server Kanaqer Guide v Appendiz A1 Error Kessaqes 85 Disk Read Errors 85 Recovered Errors Tape Errors 87 87 Miscellaneous Problems 91 App diz B1 Chanqinq the Fuse 93 In4ez 97 Gettinq Started 7100 06601 01 ...

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Page 9: ... sinqle volume an entire disk system or a specific number of blocks An imaqe resides only on the VCR tape l When restorinq data a copy of the information on the VCR tape is transferred to the destination volume drive or area on the disk The Mirror Server is a network device it must be connected to an Omninet TM local area network Chapter l Installinq the Hardware and Software explains how to conne...

Page 10: ... back up and restore information Appendix A explains several error messages and the procedures to correct the errors Appendix B explains how to change the fuse on the Mirror Server HARDWARE AND SOFTWARB RBQUJ RBD Only the system manager should use the Mirror Server To install the Mirror Server the system manager will need the following equipment a video cassette recorder a Mirror Server and a comp...

Page 11: ...Mirror Server Manager Guide 3 cHRVUS Omnlnet M e 3 Mirror Server Power Cord Network Tap Box Getting Started 7100 06601 01 ...

Page 12: ...sumes that you are familiar with your video cassette recorder There are several requirements concerninq your VCR when usinq it with a Mirror Server Always use the same video cassette recorder to back up and restore data Never use a battery operated VCR if the VCR has the battery option use a standard wall outlet To avoid errors use hiqh quality tape Also follow the manufacturer s recommended maint...

Page 13: ...y Speed Midway between Slow and Fast Audio Level MINIMUM Tracking At FIX oval Throughout this guide type means to enter two or more characters on the keyboard Type all words symbols spaces and punctuation to the right of the word type exactly as shown Do not add or leave out punctuation marks at the end of a statement Example Type DIR C Do not type the spaces between type and the first character t...

Page 14: ...and press or type applies to information supplied by you enter the information indicated Examples l Jp the filename Presa the slot number 6 To exit a Mirror proqram option press ESC to return to the previous menu Gettinq Started 7100 06601 01 ...

Page 15: ...ystem Second make a copy of the Mirror Server boot diskette The software will be copied to a system volume that was created during system generation The volume name will vary depending on the computer type but the last three letters of the volume will be SYS For example if using the Mirror Server with an IBM R Personal Computer the system volume is IBMSYS The boot diskette must be duplicated befor...

Page 16: ...sulation from the omninet cable 8 Find the point on the Omninet cable closest to where the server will be placed Use a knife to cut through the outer insulation of the cable Remove about 2 inches 5 cm of this insulation but do not cut the inner wires or remove their insulation If the wires are accidentally cut they can be repaired To repair the wires refer to steps 4 through 8 in the section Exten...

Page 17: ...ox halves are two wire guides Push the black wire from the Omninet cable into the BLACK wire guide and the red wire into the RED wire guide 6 Close the tap box Cable Wires in Tap Box Make sure none of the colored or stripped portion of the wires is visible when the tap box is closed Chapter l 7100 06601 01 ...

Page 18: ...ING THE MIRROR SERVER TO THE NETWORK The second step in settinq up a Mirror Server is to connect it to the network Follow the steps below 1 Unpack the Mirror Sarver Sava the packinq materials to use when transportinq the Mirror Server 2 sat the network address Face the back panel of the Mirror server In the upper riqht hand corner of the back panel is a switch unit Chapter l 7100 06601 01 ...

Page 19: ... address from O to 63 for the Mirror Server The address must be different from the addresses of all other devices on the network Use a pen to set the address on the switches The table below shows the switch settings for each address Set switches 7 and 8 down Chapter 1 7100 06601 01 ...

Page 20: ... 58 25 57 26 58 27 59 28 60 29 81 30 62 31 63 1 2 3 4 5 6 1 2 3 4 5 6 Address Switch Setting Address Switch Setting switch up switch down Mirror Server Addresses and switch settings connect the tap cable to the Mirror server To the right of the switch unit on the back panel of the Mirror server is a three pronged plug marked TAP Plug the three slot connector end of the tap cable into this plug Cha...

Page 21: ...nager Guide Connecting Tap Cable to Mirror server 4 connect the tap cable to the server tap box connect the other end of the tap cable into the network tap box Plugging Tap Cable into Tap Box 13 Chapter 1 7100 06601 01 ...

Page 22: ...o connect the Mirror Server to the VCR CONNECTXNG THE VCR TO THE MXRROR SERVER The final step in setting up the Mirror Server is to connect a VCR to it Follow the steps below 1 P1ug the white video plug into the right jack The video cable has two p1ugs white and colored on each end Plug the white plug at one end of the Corvus video cable into the right VIDEO IN jack on the back panel of the Mirror...

Page 23: ...ideo plug into the left jack Plug the colored plug at the same end of the Corvus video cable into the left VIDEO OUT jack on the back panel of the Mirror Server Colored Plug Attaching Video Cable to Mirror server White Plug 15 Chapter 1 7100 06601 01 ...

Page 24: ...onnections on a Panasonic NV 8200 Colored Plug White Plug Attaching Video Cable to VCR 16 This completes installation of the Mirror Server hardware Go to the next section to install the Mirror Server software COPYING THE SOFTWARE TO THE DRIVE Copying the software to the drive requires using the update option in Constellation II with volume 2 the update diskette of the Mirror Server software The di...

Page 25: ... Loq on as th ayst manaqer Attar you loq on with th system manaqer s name and password at most computers the constellation II main menu will appear If it does not enter the constellation II utilities 4 Bnter the maintenance utilities To enter the maintenance utilities Presa M The screen displays Chapter 1 7100 06601 01 ...

Page 26: ...E Exit Please select an option s Select the option to update utilities To select the update option Press u The screen display is similar to 18 Please insert the update diskette in the floppy drive Press SPACE after insertinq the diskette a Insert the update diskette in the computer Insert the diskette labeled UPDATE in the floppy drive The update diskette is volume 2 of the Mirror Server diskettes...

Page 27: ...tte to use for booting the Mirror Server program from floppy Use a new unformatted diskette for the copy Use the MS TM DOS DISKCOPY program the CP M R COPY program or an equivalent block copy program to make an exact duplicate of the source diskette Do not use a write protect tab or otherwise write protect the duplicate diskette because the Mirror Server program must write to the diskette Label th...

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Page 29: ... the disk system changes In other words if network users are making daily entries in a database make daily backups If network users update patient records weekly make weekly backups Backups should not be needed in the normal course of system management but not having one when it is needed can be disastrous Make the backup a routine part of system management to avoid the frustrating situation of no...

Page 30: ...stems to be backed up or restored Because some occasions may require using the Omninet address and drive number instead of the server and drive names the Mirror Server program will also accept the numbers However the program will still request the drive password if it can read it on the disk Another commonly used term multiple server means that more than one mass storage system is operating on the...

Page 31: ...ansferred with one transfer table Once a transfer table exists the Mirror Server can back up or restore data To use the Mirror Server program you must either enter Constellation II and select the backup utilities option or boot your computer with the copy of the boot diskette After reaching the main menu you can create a transfer table back up data restore data and identify the contents of a tape ...

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Page 33: ...re it can be used to back up and restore information BUrLDrNG A TABLE This section describes how to build a transfer table to use in backinq up and restorinq data For step by step instructions on buildinq a transfer table qo throuqh the sample session in Chapter 7 The Mirror Server proqram allows three types of transfer All three different types drive volume and block can be built into one table U...

Page 34: ...he same table can again be used Create a transfer table from the transfer table menu After you select the create a table option the screen display is similar to MIRROR Server x xx Create Transfer Table OS SERVERO DRIVE Drivel D add Drives to table V add Volumes to table B add Blocks to table L List table E Exit Please select an option To make a transfer table to back up all data on a drive or rest...

Page 35: ...multiple server network the program displays the names of all active servers The image name and the comment are written in the directory of the VCR tape so that the image can be identified Be sure to use a unique name no two images on a VCR tape can have the same name The program suggests the drive name as the default but you can create any name up to 10 characters long Messages can be up to 80 ch...

Page 36: ...nsfer table you must save it before using it First check the accuracy of the table by listing the table on screen To list a transfer table refer to the section Listing A Table in this chapter If the table is correct save it by following the steps in the section Saving A Table in this chapter BLOCJC TRDSl Bll Block transfer also has a pathname similar to drive transfer with the addition of two fiel...

Page 37: ...ze requirements The image name for a block transfer can also have 10 characters but the default name contains the letters BK for block and the address For example if you specified a block transfer from block a the default image name would be BKS Accept the suggested name or create your own After you create a transfer table you must save it before using it First check the accuracy of the table by l...

Page 38: ... blocks If the table is correct press SPACE to return to the transfer table menu If the table is incorrect press E to erase the table The screen will display the transfer table menu Re create the table with the correct information SAVJ llG A l ABLB If you exit the transfer table menu without savinq the table the newly created table is cleared from memory and cannot be used for backup or restoratio...

Page 39: ...nsfer table saved Press space to continue The transfer table is saved to a file either in the system volume with the name ending in SYS or on the floppy diskette if you booted from the Mirror Server bootable diskette To return to the Mirror Server main menu press SPACE To learn about using a transfer table to back up or restore data go to Chapter 4 Backing up Data or Chapter 5 Restoring Data Chapt...

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Page 41: ...nutes so convert megabytes to minutes to determine the correct tape size For example to back up a 45 MB OmniDrive multiply the capacity 45 MB by the transfer rate one nd a half minutes per MB to compute the time required 68 minutes In this example the smallest tape size that should be used is 90 minutes although any larger tape can be used Always overestimate and use a tape that is greater than th...

Page 42: ...r the CORVUS volume is damaged the entire drive loses its organizational structure all volumes are rendered useless If this happens only a block transfer can be used to restore the drive Always keep block images of each drive s block 8 and CORVUS volume The sample session in Chapter 7 details how to back up this critical information Always make new backups after changing users volumes or access on...

Page 43: ... below For a step by step explanation of backinq up data and verifyinq the backup see the sample session in Chapter 7 BACKING UP TO A TAPB Select the backup option from the Mirror Server main menu After the backup option is selected the screen displays the saved transfer table then displays Is transfer table OK Y N If the saved table is not correct press N and re create the table If it is OK press...

Page 44: ...Server program can create a results file to record the number of disk read errors the blocks on the drive that the Mirror Server program could not read To save this file for future reference spool it to the network pipes area The program automatically looks for the pipes area on the disk system at omninet address o Do not select this option if no pipes area exists at server o If using the bootable...

Page 45: ... or enter the length of the tape in minutes Tape length is marked on the tape package After the length is entered the screen displays current date DD MMM YY 02 APR 84 The date appears in the tape directory and it is an important identifying feature of the images on a VCR tape Enter the date in the form DD MMM YY where DD is day MMM is month and YY is year After the date is entered the screen displ...

Page 46: ... the computer press RETURN The program first creates the tape directory Once the directory is created the screen displays Backup in progress Writing tape directory 38 After the program finds and backs up the first image it looks for the next image Each image name is listed on screen as the imaqe is being backed up When the backup is complete the screen display is similar to Backup finished Error s...

Page 47: ...f the tape to make sure you are verifying the proper tape There are two methods to identify the contents of a tape the list tape directory option and the identify tape image option To use one of these options turn to Chapter 6 Identifying a Tape To verify a tape after a backup press V from the main menu to select the verify option If the Mirror program has not already loaded the tape directory int...

Page 48: ...fy the first imaqe press N The proqram then replaces the name of the first imaqe with the name of the second To verify the first imaqe on the tape press Y The name remains on the screen and the name of the second imaqe appears just below it Decide about verifyinq the second imaqe press Y or N as needed If the verification is requested the name remains on the screen if it is not requested the name ...

Page 49: ...oes not appear After verification despool the results to a printer or a volume on the drive Whether or not the file is spooled the screen will display the results after all data is verified If selecting the spool option answer the program s questions about pipe name file name and comment After the comment is entered the screen displays Rewind the tape and start playback then press return Rewind th...

Page 50: ... to identify The dotted line shows the last unused space on the tape In the above example the from the tape read head forward option on the VCR image image to identify is six steps In this case use the fast to move closer to the desired To stop the play function press STOP Then press FAST FORWARD After five seconds press STOP and compare the positions of the symbols Repeat this procedure increasin...

Page 51: ...he last unused portion of the tape the screen may display Unable to read tape position Keep trying Y N If the above screen appears press Y and rewind the tape The image locator scale should again appear on the screen After the program finds and verifies the first image requested it looks for the next The program continues in this way until it finds and verifies all the images requested The program...

Page 52: ...pears stop the VCR If a verify results file was named the file is now spooled to the pipes area Be sure to despool the file If any errors are reported refer to Appendix A Otherwise press SPACE to return to the Mirror server main aenu Chapter 4 7100 06601 01 ...

Page 53: ...om an older model Corvus drive to an OmniDrive the block transfer option must be used Block transfer and volume transfer are independent of the model of Corvus drive and both will work between different models If the drive to be restored does not have a server name and drive name use the Omninet address and the drive number to specify the disk system that will receive the image A drive will not ha...

Page 54: ...mage refer to the section Volume Transfer in Chapter 3 When the program requests the image name enter the name of the drive image containing the volume rather than a volume image name The program will look for the volume within the drive image and transfer it to the drive There are no specific requirements for restoring an image of a group of blocks The drive only needs its names and enough space ...

Page 55: ...rive To learn how to identify the contents of a tape refer to Chapter 6 Identifying a Tape Once the correct image is found transfer the image from the tape to a drive or a volume To learn how to restore an image read through the rest of this chapter For a step by step explanation of how to restore an image refer to the sample session in Chapter 7 After identifying the tape make sure that the desti...

Page 56: ...ry Once the tape directory is loaded into the computer s memory the screen displays Spool errors to a result file Y N Y The result file includes the name of each image containing errors and the numbers of recovered errors and tape read errors See Appendix A for an explanation of the errors To save this file for future use spool the file to the pipes area The file can later be despooled to a file o...

Page 57: ...he computer similar to Restore in progress searching for VOLl Then press PIAY on the The screen display is 49 where VOLl is the first image name in the transfer table After the program finds the image it begins the restoration The screen display is similar to At volume VOLl The restoration takes as long as the backup did If the transfer table has more than one image to be restored and the images a...

Page 58: ...ar and the restoration begins immediately The proqram follows this procedure until all restorations in the transfer table are complete After the last restoration is finished the screen displays Restore complete Error Status Recovered errors o Tape Read Errors o Press space to continue Stop the VCR If a results file was named the file is now spooled to the pipes area Be sure to despool the file If ...

Page 59: ...ectory provides the quickest method of identifying the contents of a tape The tape directory contains the details of the image and the date it was made To read the tape directory the program goes only to the beginning of the tape it does not need to find the beginning of an image For this reason use this method to save time To learn how to use the identify option read through the section below For...

Page 60: ...t it is searching for the tape directory Once the tape directory is loaded into the computer s memory or if the tape directory was already in the computer s memory the screen displays Identify all images Y N N To identify all images press Y for spooling the identify file corresponding screen below The program may prompt Skip to the To identify only specific images press RETURN The screen displays ...

Page 61: ...s information for later reference spool the file to the pipes area The file can later be despooled to a printer or a volume Remember that the pipes area must exist on server o for this option to work and that the spool option does not appear when running the program from the bootable diskette Whether or not the file is spooled the screen will display the results after all data is backed up If spoo...

Page 62: ... read head closer to the imaqe once the v is one or two steps from the x press PLAY and wait until the proqram finds the imaqe continue this procedure until the proqram finds and identifies all imaqes on the tape For more information on how to use the imaqe locator scale turn to the section Verifyinq a Backup in Chapter 4 When identifyinq only specific imaqes the proqram displays the scale shown a...

Page 63: ...ter the screen displays the header information for the last identification the screen displays Press space to continue Once the above screen appears stop the VCR If the file was s nt to the pipes area the results will now be spooled Be sure to despool the file Return to the main menu by pressing SPACE LISTING A TAPE DXRECTORY Select the list tape directory option from the Mirror Server main menu I...

Page 64: ... program is run from the bootable diskette Whether or not the file is spooled the screen will display the results after all data is backed up If spooling the file answer the program s questions about pipe name file name and message Once the message is entered the screen displays Rewind tape and start playback then press return Load the tape containing the directory to be listed into the VCR and re...

Page 65: ...ars only if the option was selected during backup If this line does appear the data on the tape cannot be restored to a drive other than an OmniDrive If it is information will be lost If the directory includes any single image specified as more than 65280 blocks note that it will appear as two or more images This will occur when backing up OmniDrive disk systems of 45 MB or more No single image ca...

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Page 67: ...f the second disk system on the network and it has drive name DRIVE and password LOCK SERVERO is at Omninet address o and contains the system volumes and the PIPES volume the network pipes area SERVER is at omninet address 1 and contains only private volumes To qet the mo t out of this practice sea ion go through all the sections in the order they are presented BllTBR TBB KIRROR BERVER PROGRU This...

Page 68: ...rinq data must also be on 3 Turn OD the computer C Loq OD 8 the J t maqer After logqinq on a the yst aanaqer the screen ehould di play the Constellation II main menu If it do not enter the Con t llation II utilities 1 hter the backup utiliti ProJI the Conetellation II main aenu r B The screen di play Lookinq for Mirror Server once the proqraa find the Mirror Server th creen di plays Chapter 7 7100...

Page 69: ...er table v Verify backup L List tape directory I Identify tape images H Help E Exit Please select an option 61 Before continuing with the sample session go to the next section to find out how to enter the program from the bootable diskette FROM THB BOOTABLB DISKBTTB Enter the program from floppy whenever the drive containing the Mirror Server program is inoperable In particular when the drive or t...

Page 70: ...l BR TULB The transfer table for this session will contain a drive transfer from SERVER a volume transfer from a volume named WSVOL on SERVERO and a block transfer of block 8 and the CORVUS volume on SERVER Corvus Systems recommends that you back up the CORVUS volume and block 8 for all your drives If block 8 or the CORVUS volume were ever destroyed the drive would be inaccessible and the backup w...

Page 71: ...st table E Exit Please select an option 2 Choose the drive option From the transfer table main menu Press D The screen displays Please enter pathname Valid servers are Servero Serverl 3 Bnter the path name server name Servero 63 Remember that for the drive transfer the drive to be backed up is SERVERl DRIVEl Type SERVERl Press RETURN Chapter 7 7100 06601 01 ...

Page 72: ...vel Drive password The drive password is LOCK Type LOCK Press RETURN The screen displays Image name DRIVEl 4 Bnter the image naae an4 oo ent Call this image IMGSRVl Try to give all images somewhat meaningful names Type IMGSRVl Press RETURN The screen displays 64 CO ants Chapter 7 7100 06601 0l ...

Page 73: ...fer pathname Repeat steps 2 throuqh 5 for the volume transfer In step 2 press V to add the volume transfer This time select SERVERO with passwork KEY in step 3 but note that you are prompted for volume name before imaqe name Enter the name WSVOL the name of the volume to be backed up In step 4 name the imaqe IMGWSVOL and make a descriptive comment Aqain return to the main menu in step 5 and qo to ...

Page 74: ...ss RETURN 66 The screen displays the prompt for image name Name the image IMGBKSCOR and make a descriptive comment Again return to the main menu in step 5 The transfer table is complete To check that all three entries are correct qo to the next section to list the table LIST THE TRANSFER TABLE This section shows how to list the parameters of the transfer table on the screen Use this option to chec...

Page 75: ...IDRIVE1 IWSVOL IIMGBKSCOR ISERVER1 IDRIVE1 I 8 Press space to continue press E to erase table 135860 I 1024 301 Check the table and verify that the parameters are correct If they are return to the transfer table menu Press SPACE The screen displays the transfer table main menu SAVE TBB TRAllBFBR TABLB 67 This section shows how to save the transfer table From the transfer table menu Presa E The scr...

Page 76: ... the Mirror Server main menu The transfer table has now been created checked and saved Go to the next section to back up the data specified in the transfer table BACK UP THB DATA This section shows how to back up the information The three images will be sent to a 120 minute tape titled SAMPLE BACKUP 1 Select the backup option From the Mirror Server main menu Press B After a moment the screen displ...

Page 77: ...WSVOL ISERVERO IDRIVEl IWSVOL I 1024 I 1IMGBKBCOR ISERVERl IDRIVEl I 8 301 I I transfer table OK Y N After checkinq to make sure that the table is correct Press Y The screen displays Will this tape be used exclusively to backup and restore omniDrives Y N The drive backup can be restored only to an omniDrive since this network has no other type of disk server Press Y The screen display is similar t...

Page 78: ...pool the results to the pipes area The results will be displayed on the screen instead Press N The screen displays Enter tape title 3 Enter the tape title Type SAMPLE BACKUP Press RETURN The screen displays Tape length in minutes 30 4 Enter the tape length The tape to be used is 120 minutes long Type 120 70 Chapter 7 7100 06601 01 ...

Page 79: ...nter today s date For example Type 13 SEP 84 Press RETURN 71 After the date is set the screen displays Time 14 30 6 Bnter the time Enter the correct time using the 24 hour clock For example Type 15 45 Press RETURN The screen displays Chapter 7 Rewind tape and start recording Then Press return 7100 06601 01 ...

Page 80: ...and RECORD buttons at the same time Wait a few seconds until the leader tape has cleared the heads on the computer Press RETURN The screen displays Backup in proqress Writinq tape directory After the proqram finds and backs up all three imaqes the screen should display Backup finished Error status Disk read errors o Preas space to continue Once the backup is done stop the VCR Chapter 7 7100 06601 ...

Page 81: ...ERl the volume WSVOL on SERVERO and blocks 8 through 309 on SERVER have now been backed up to the VCR tape VERXFY THB BACKUP Xn this section the images on the tape are verified to ensure that they are readable 1 Begin the verify procedure From the Mirror Server main menu Press V The screen displays Verify all images Y N N Chapter 7 7100 06601 01 ...

Page 82: ... results file For this example the results file will not be spooled to the pipes area The results will be displayed on the screen instead Press N The screen displays Rewind the tape and start playback then press return 4 verify the images 74 Rewind the tape to its beginning and press PLAY on the recorder On the computer Press RETURN The screen displays Chapter 7 7100 06601 01 ...

Page 83: ...ng all three images the program gives an error summary The screen display is similar to Error Status Recovered errors 35 Tape read errors O Press space to continue To return to the Mirror Server main menu Press SPACE The screen displays the Mirror Server main menu Stop the VCR after the menu appears The image verification is complete Follow the same procedure to back up similar information on your...

Page 84: ...table Although SERVERl is not functioning correctly SERVERO the drive containing the Mirror Server program is still operable Since the program runs from SERVERO you do not have to run it from the bootable diskette Before restoring the blocks though use the identify tape images option to make sure you are using the correct tape IDENTIFY THE IMAGE This section shows how to use the identify tape imag...

Page 85: ...he computer Press RETURN Th screen may display searchinq for tape directory After the proqram finds the tape directory and loads it into the computer memory the screen displays Identify all images Y N N 3 Dealt which iaacJ to identify Identify only the desired imaqe IMGBJCSCOR Presa RETURN The screen display is similar to Chapter 7 7100 06601 01 ...

Page 86: ...each image in the tape directory and stops at the last entry in the list Accept the name IMGBKSCOR but reject the other two After the last name is displayed the screen displays Spool to an identify file Y N Y 4 Determine the destination for the identify file In this example the results will be spooled to a file The file can be spooled because the program is not running from the bootable diskette A...

Page 87: ...riate position Use the scale on the screen to locate the image on the tape The v symbol on the scale shows the position of the tape read head The underline mark represents a step or one fortieth of the VCR tape The X shows the position of the image to identify The dotted line shows the last unused space on the tape In this example the image to identify is six steps from the tape read head In this ...

Page 88: ...o continue Once the above screen appears stop the VCR To return to the Mirror server main menu Press SPACE The screen displays the Mirror Server main menu The contents of the tape have been identified and you know that the tape has the correct imaqe RESTORE TBB DATA This section shows how to restore the blocks to the drive Remember that a new transfer table must be created with omninet address l f...

Page 89: ...Mirror Server main menu Press R The screen displays the new transfer table MIRROR server x xx Restore to drive OS SERVERO DRIVE Drivel current Transfer Table I Image I Name I Server I Drive I Name I Name IIMGBI SCOR 11 11 Is transfer table OK Y N I Volume I Length I Address Blocks I a 301 Check the table The parameters should be correct Note the numbers instead of server and drive names If the tra...

Page 90: ...ds it into the computer s memory the screen displays Spool errors to a result file Y N Y 3 Determine the destination of the results file In this example the results will be spooled to a results file Aqain this is possible because the drive containinq the pipes area still works If the drive beinq restored contained the pipes area or if the proqram was runninq from the bootable diskette the file cou...

Page 91: ... comment After the comment is entered the screen displays Position the tape start playback on VCR and press return 4 Prepare the VCR Rewind the tape to its beginning Then press PLAY on the VCR On the computer Press RETURN The screen displays Restore in progress Searching for IMGBKSCOR v X l Chapter 7 7100 06601 01 ...

Page 92: ...should be similar to Restore complete Error Status Recovered errors 24 Tape Read Errors o Press space to continue Stop the VCR and return to the Mirror Server main menu Press SPACE The screen displays the Mirror Server main menu Despool the results files from the pipes area to a file or a printer to have a record of the restoration That concludes the sample session Drive SERVER DRIVEl volume WSVOL...

Page 93: ... and tape errors At the end of this discussion you will ind a table that outlines miscellaneous problems their causes and possible solutions DISK READ ERRORS If the Mirror Server program cannot read data from specific areas of the drive during a backup it notes the number of the defective block or blocks Once the backup is complete the screen displays the error status showing the total number of d...

Page 94: ...rrors I I ACCT I servero I Drivel I 2 I Press space to continue 86 Once all entries are listed use the information to identify which drive has the read errors Write down the server and drive names of any disk with errors Pressing SPACE will redisplay the main menu or if one screen cannot display all entries will continue the listing Run throuqh the backup procedure again If the program again repor...

Page 95: ...r defective First clean the heads on the VCR If the program continues to report recovered errors at the end of verify or restore procedures after the heads are cleaned the tape may be too damaged to use and may need replacing TAPE ERRORS When a tape read error is listed in the error status of a verify or restore procedure all four copies of the specific block of data are incorrect or incomplete Th...

Page 96: ...p the data clean the recordinq heads Also make sure the VCR color enhancement feature is turned off If errors occur durinq the restore procedure run throuqh the procedure aqain This time however build a separate transfer table for each imaqe containinq tape errors then try to restore each imaqe to the drive If after the second restore procedure the error status still contains tape read errors the ...

Page 97: ... remaining tape read errors and again indicates that a retry pass is needed It may take many retry passes to rebuild the incomplete blocks of data Follow the above procedure until no more tape read errors are listed If the program continues to list tape read errors after 10 retry passes the tape is too damaged to use Use an earlier backup tape to restore the volume or drive Another tape error mess...

Page 98: ...ion check option of constellation II to check the size of the volume or disk system to restore If the two sizes do not match find the correct image or restore to a drive or volume of the correct size The error message tape dropout during playback indicates that a portion of the tape being read was not recorded or has been partially erased Possible causes are that o Someone accidentally stopped or ...

Page 99: ...ted image This message usually appears on the screen when the program or the user misjudges the position of the image on the tape and rewinds the tape to the wrong starting point If this happens begin the procedure again MISCELLANEOUS PROBLEMS The table below lists miscellaneous problems and error messages that may occur when the Mirror Server is used It also lists the possible causes and remedies...

Page 100: ...retry backup I not read or under I I stand operating sys I I tem code I Controller time I Loose or incorrect out I connections between Error 255 86 I Mirror Server and Mirror server I VCR receiving no I incoming data I Blank or defective I tape Position error Error s Invalid restore command Error 2 Appendix A I I Incorrect VCR I settings I I Color enhancement f feature on I f VCR started in f midd...

Page 101: ...nged Check the fuse and replace it if it appears burned out The unit will not work without a fuse To change the fuse follow the steps below 1 TUrn off the Mirror server 2 unplug the Mirror Server Never change a fuse with the Mirror Server plugged in 3 Unlatch the fuse cylinder On the back of the Mirror Server is a circular fuse holder Using a screwdriver push the central cylinder in and turn it co...

Page 102: ...Mirror Server Manager Guide Unlatching Fuse Cylinder 4 R ove the cylinder from the holder Removing Cylinder s Check the fuse Appendix B 94 7100 06601 01 ...

Page 103: ...ve the detective fuse If the fuse is defective remove it PUll gently to remove it from the cylinder 7 Insert a good fuse 95 The Mirror Server uses 1 2 AMP 250V fuses available from computer dealers or electronics stores Gently push a good fuse into the cylinder Inserting Fuse in Cylinder Appendix B 7100 06601 01 ...

Page 104: ...lder 9 Latch the cylinder in place Using a screwdriver push the cylinder in and turn it clockwise Latching the Cylinder 96 Plug in the Mirror Server and turn it on The indicator lights should light up If they do not the unit should be checked by an authorized Corvus service center Appendix B 7100 06601 01 ...

Page 105: ...sfer 28 29 see also Transfer methods CORWS volume 34 Chained drives 22 Chanqinq the fuse 93 96 Cleaninq VCR heads 4 87 88 90 Copyinq the boot diskette 19 Creatinq a transfer table 25 31 buildinq a table 25 27 entry 23 number of entries 23 sample session 62 68 where table is saved 25 26 31 see also Transfer table Date of backup 3 7 Disk read errors 85 86 see also Brror status Disk server 7 22 Drive...

Page 106: ...also Identifying a tape image and Listing a tape directory Identifying a tape image 51 55 selected images or all images 52 53 Image 1 22 33 maximum size 57 types of images 1 see also Drive image Image locator scale 42 43 49 50 54 Image name 22 27 default names 27 28 29 duplicate names 27 length 27 Indicator lights 23 Installing Mirror server software 16 19 volume containing the program 7 replaceme...

Page 107: ...p 21 23 Pathname 27 Recommended backup schedule 21 see also Backing up data Backup Recovered errors 87 see also Error status Restoration 1 see also Restoring data Restoration results file 48 see also Spooling results files Restoring data 45 50 from within a drive image 46 sample session 80 84 to the volume or drive containing the program 46 when server and drive name are damaged 45 from older Corv...

Page 108: ...ransfer table 23 25 31 see also creatinq a transfer table Transfer methods 23 26 27 see also Block transfer Drive transfer and Volume transfer Updatinq disk servers 7 Usinq the boot diskette 7 VCR 1 4 requirements 4 5 connectinq to Mirror Server 14 16 connectinq video cable 16 see also Cleaninq VCR heads Verify results file 41 see also Spoolinq results files Verifyinq the backup 39 44 sample sessi...

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Corvus systems Mirror Server, Manager'S Manual

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