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Troubleshooting Guide

Problems During Backup/Restore Operations

63

2.

If the tape drive is not attached to an LVD SCSI controller, attach the tape drive to a LVD SCSI
controller to achieve best possible hardware performance for best possible transfer rate.

3.

If the tape drive is attached to an LVD SCSI controller, see whether the tape drive is the only
device on the SCSI cable? This can be determined by viewing Windows Device Manager,
viewing Unix/Linux logs, or by viewing SCSI controller during system boot up.

4.

If other SCSI devices are attached to the SCSI controller and are active during the time when
a backup is performed to the tape drive, have the tape drive as the only device on the SCSI
cable to achieve the best possible backup performance.

The method of performing the backups can also be a factor in “slow” backups. Data sent to the tape
drive over a network connection and delays in data transfer over a network connection can cause
backups to slow down.

1.

Perform write/read test with diagnostic software. This ensures a test of the connection
between the tape drive and SCSI controller and removes the network data transfer and the
backup software from the diagnosis. The write/read test WILL OVERWRITE DATA ON THE
TAPE.

2.

When the test finishes, determine the megabyte per second data transfer. The resulting calcu-
lation shows the tape drive performing at an acceptable rate.

3.

If you believe that the write/read transfer is slow even after using the diagnostic software
write/read test, use the Certance Tape Diagnostic software to perform a trace buffer retrieval.
Send the file to Technical Support, so that the state of the SCSI bus can be determined.

4.

If the diagnostic write/read test transfer rate is acceptable, but backups still seem to be
“slow,” it may be attributed to the number of files and the average file size that are to be
backed up. These factors can have a significant effect on the backup performance. Backups
where the average file size is less than 200k bytes are slower than backups where the aver-
age file size is greater than 200k bytes. Obtain backup log files to determine number of files
and average file size.

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Содержание LTO 2

Страница 1: ...i Online User s Guide LTO 2 Half Height Tape Drive C E R T A N C E ...

Страница 2: ...ion may be reproduced in any form without written permission from Certance LLC Certance provides this manual as is without warranty of any kind either expressed or implied including but not limited to the implied warranties of merchantability and fitness for a particular purpose Certance reserves the right to change without notification the specifications contained in this manual Certance assumes ...

Страница 3: ...product Power cord protection The power cord should be routed so that it is not likely to be walked on or pinched by items placed upon or against it paying particular attention to the cord at the wall receptacle and the point where the cord exits from the product To complete the disconnection of the electricity please remove the power electric cord and the SCSI cable from their connections in the ...

Страница 4: ...40 F 40 C Keep the unit away from direct sunlight strong magnetic fields excessive dust humidity and electronic electrical equipment which generate electrical noise Hold the power cord by the head when removing it from the AC outlet pulling the cord can damage the internal wires Use the unit on a firm level surface free from vibration and do not place anything on top of the unit ...

Страница 5: ... or more of the following measures Reorient the receiving antenna Relocate the computer with respect to the receiver Move the computer into a different outlet so that the computer and receiver are on different branch cir cuits Further this equipment complies with the limits for a Class B digital apparatus in accordance with Canadian Radio Interference Regulations Cet appareil numérique de la class...

Страница 6: ...ng a Desktop LTO 2 Half Height Drive 22 Chapter 3 Operation 25 Understanding the Front Panel Display 25 Blink Codes 26 Using LTO Cartridges 27 Drive Maintenance 29 Chapter 4 Theory 30 Track Layout 30 Recording Method 31 Data Buffer 31 Data Integrity 31 Data Compression 33 Chapter 5 Specifications 35 Physical Specifications 35 Power Specifications 37 Drive Performance Specifications 38 Environmenta...

Страница 7: ...Configuring for the IBM AIX Environment AIX Version 4 1 x and later 47 Configuring for SCO Open Server 5 0 x 49 Configuring for Linux 51 Configuring for SGI Irix 52 Configuring for HP UX 11 0 53 Chapter 7 Troubleshooting Guide 54 Installation Best Practices 54 Troubleshooting Suggestions 55 Emergency Reset and Emergency Cartridge Eject 59 Problems During Backup Restore Operations 60 ...

Страница 8: ...ions 19 Figure 5 Rear View of the Internal LTO 2 Half Height Drive 20 Figure 6 Two SCSI Termination Examples for the Internal LTO 2 Half Height Drive 21 Figure 7 SCSI Termination Examples for the Desktop LTO 2 Half Height Tape Drive 23 Figure 8 Generic Front Panel Display 25 Figure 9 Ultrium Cartridge Showing Write protect Switch 28 Figure 10 Layout of Tracks on LTO Ultrium Tape 31 Figure 11 Inter...

Страница 9: ... Drive Blink Codes 26 Table 4 Physical Specifications 35 Table 5 Voltage and Current 37 Table 6 Power Dissipation 37 Table 7 Drive Performance Specifications 38 Table 8 Environmental Requirements 39 Table 9 Reliability 39 Table 10 Environmental Tolerances 41 Table 11 Safety Compliance 42 Table 12 Electromagnetic Compatibility 43 Table 13 SCSI Controllers 44 ...

Страница 10: ...elligent data compression The drive has a native capacity of 200 Gbytes 400 Gbytes assuming 2 1 data compression The LTO 2 half height drive as shown in Figure 1 below has a 5 inch half height form factor with automatic electromechanical cartridge soft load It is available as an internal and a desktop drive The internal LTO 2 half height drive is designed to fit in a 5 inch half height drive bay T...

Страница 11: ...by analyzing compressibility prior to recording Cartridge memory enables fast loading of cartridges and stores pertinent information about the media 32 Mbyte data buffer for extra fast backups on high performance systems Tape Alert drive performance monitoring and reporting 3rd generation read channel for increased maturity and data integrity Patented head positioner for increased data integrity S...

Страница 12: ...as well as a summary of cabling and connec tor specifications It also provides quick start instructions for getting the drives up and running in the shortest possible time Chapter 3 Operation explains the use and operation of the drive and describes mainte nance procedures Chapter 4 Theory describes the theory of operation behind the drives including the tech nology used in various drive component...

Страница 13: ...k each step as you complete it If you need more information about a step turn to the section refer enced in the step 1 Unpack the contents of your drive package and check for damaged items See Unpacking and Inspection on page 15 2 Review the drive s default settings and change them if necessary SCSI ID 6 Terminator Power Disabled See Configuring the Internal Tape Drive on page 16 3 Turn off your c...

Страница 14: ...erly 9 Register your tape drive See Registering Your Tape Drive on page 22 1 Unpack the contents of your drive package and check for damaged items See Unpacking and Inspection on page 15 2 Review the drive s default settings and change them if necessary SCSI ID 6 See Setting the SCSI ID on page 22 3 Connect a SCSI interface cable to the drive See Connecting a SCSI Cable on page 22 4 Check the SCSI...

Страница 15: ...ty of damage from static discharge the drives are shipped in a protective antistatic bag Do not remove the drive from the antistatic bag until you are ready to install it Before you remove the drive from the antistatic bag touch a metal or grounded surface to dis charge any static electricity buildup from your body Always lay the drive either on top of the antistatic bag or place it inside of the ...

Страница 16: ...I ID and terminator power features The default configuration settings for the LTO 2 half height drive are SCSI ID 6 Terminator power disabled If you need to change these settings refer to the following sections Otherwise skip to Mounting the Internal Tape Drive on page 18 SCSI ID Each SCSI device on the bus must have its own unique SCSI ID The internal tape drive is shipped with a default SCSI ID ...

Страница 17: ...ed Open Shunted Open 6 default Open Shunted Shunted Open 7 Shunted Shunted Shunted Open 8 Open Open Open Shunted 9 Shunted Open Open Shunted 10 Open Shunted Open Shunted Drive Configuration Jumper Pins Jumper Settings Default settings SCSI ID 0 SCSI ID 1 SCSI ID 2 SCSI ID 3 SCSI ID 4 SCSI ID 5 SCSI ID 6 SCSI ID 7 SCSI ID 8 SCSI ID 9 SCSI ID 10 SCSI ID 11 SCSI ID 12 SCSI ID 13 SCSI ID 14 SCSI ID 15...

Страница 18: ...t side up Figure 3 Acceptable Mounting Orientations Mount the drive in a 5 25 inch half height drive bay and secure it using two M3 0 X 3 metric screws on each side of the drive Do not use screws longer than 3 mm or you may damage the drive Figure 4 on page 19 shows the locations of the mounting screw holes on the side and bottom of the drive respectively 11 Shunted Shunted Open Shunted 12 Open Op...

Страница 19: ...alf Height Drive 19 Figure 4 Internal LTO 2 Half Height Drive Mounting Dimensions 226 5 O ALL LENGTH INCL CONECTORS THIS HOLE 3 0 10 0 40 75 4X M3 0 X 5 0 0 5 47 4 52 9 79 2 2X M3 0 NEARSIDE 2X M3 0 FARSIDE 3X 5 0 5 0 BEZEL THICKNESS 2 4 146 0 140 0 144 8 221 0 ...

Страница 20: ...nation By default the internal LTO 2 half height drive does not provide SCSI termination If you use this default setting you must place a SCSI bus terminator or a SCSI device with termination enabled at the end of the SCSI chain Two examples of SCSI termination are shown in Figure 6 below The internal LTO 2 half height drive provides terminator power if a jumper is placed on the termina tion power...

Страница 21: ...back of the drive see Figure 5 on page 20 Pin descriptions are detailed in Table 2 below Connecting a Power Cable Attach a four pin power cable to the power connector on the back of the drive Figure 5 on page 20 shows the location of the power connector Table 2 Serial Interface Connector Pin Assignments Pin Numbers Description 1 Txa Rxd 2 Txa Rxd 3 Ground 4 Txa Rxa 5 Txd Rxa 6 Sensed 7 Sensea 8 Re...

Страница 22: ...omputer through a SCSI port Installing a desktop drive involves the following steps 1 Setting the SCSI ID on page 22 2 Connecting a SCSI Cable on page 22 3 Checking the SCSI Termination on page 23 4 Connecting a Power Cord on page 23 5 Registering Your Tape Drive on page 24 Setting the SCSI ID Each SCSI device on the bus must have its own unique SCSI ID The desktop tape drive is shipped with a def...

Страница 23: ... terminating plug on the unused SCSI connector See Figure 7 on page 23 for two SCSI termination examples Figure 7 SCSI Termination Examples for the Desktop LTO 2 Half Height Tape Drive Connecting a Power Cord Attach the power cord securely to the power connector on the back of the desktop LTO 2 half height drive NOTE Termination power is enabled as a default for desktop drives External Tape Drive ...

Страница 24: ...the LTO driver See the Resource CD This driver is not necessary with commercial backup application software Registering Your Tape Drive After you install the desktop tape drive be sure to register it Registering your drive ensures that you will receive the latest information about your drive as well as other product service and support information For your convenience you can register your drive t...

Страница 25: ... Front Panel Display Figure 8 below shows a generalized view of the LTO 2 half height drive front panel display Figure 8 Generic Front Panel Display All drives have four LEDs on the front panel The LED colors and functions are summarized below Power LED green Activity LED green Error LED orange Status LED amber The Activity Error and Status LEDs blink or go on to indicate information about the tap...

Страница 26: ...ding or verifying Slow Manual intervention required ON Power On Self Test POST failure Fast ON Cleaning cartridge present ON ON Cleaning cartridge at EOT ON Fast Servo initialization Slow Slow Power On Self Test POST in progress Slow Slow Slow Cleaning failure or media error Fast Fast Microcode download Fast Slow Fast Microcode download error Fast Fast Fast NOTE In Table 3 on page 26 ON refers to ...

Страница 27: ... on the front of the drive Write protecting a Cartridge Ultrium cartridges have a sliding write protect switch near the back right corner of the cartridge as shown in Figure 9 below If you slide the switch to the position farthest from the corner of the cartridge data can be read from the cartridge but not written to it If you slide the switch all the way toward the corner as shown in Figure 9 dat...

Страница 28: ...rtation a data cartridge has been exposed to conditions outside the above range it must be conditioned before use in the operating environment The conditioning process requires exposure to the operating environment for a time equal to or greater than the time away from the operating environment up to a maximum of 24 hours Keep the cartridge away from direct sunlight and heat sources such as radiat...

Страница 29: ...g process is completed the cartridge may be ejected automatically or you may need to press the load unload button to remove the cartridge depending on the drive configuration Each time you use the clean ing cartridge write the date on the label for future reference Each time the drive is cleaned the tape advances to a new unused section of media After approxi mately 50 cleanings all of the media w...

Страница 30: ...e data bands are numbered 2 0 1 3 Data band 2 is closest to the bot tom edge of the tape A track group is a set of tracks that is recorded concurrently The sets of 16 data tracks in a data band are data sub bands There are 8 data sub bands per data band The data tracks are accessed in a serpentine manner A wrap is a track group recorded in the physical forward or physical reverse direction The wra...

Страница 31: ... data compression in the case of compressible data being transferred from SCSI at 160 Mbytes sec Data Integrity The mechanical and electrical design of the drives ensures that drive performance does not degrade over a drive s operating life Changes in head alignment head wear component drift and other factors are minimized to ensure that data integrity and interchange capability are not compromise...

Страница 32: ... to the invalid Codeword Pair is passed to the C1 ECC correction engine If the C1 ECC correction engine can correct the error then the corrected bytes are writ ten to memory and the Valid bit is set Otherwise the Valid bit is left cleared As data is read from memory to the Data Processor for decompression the C1 ECC is again checked and an interrupt generated if it is not correct C2 ECC C2 ECC inv...

Страница 33: ...stream is identified and represented by codewords or symbols which allow the same data to be recorded in a fewer number of bits These codewords or symbols point back to the original data string using fewer characters to represent the strings Because these smaller symbols are substituted for the longer strings of data more data can be stored in the same physical space Some important benefits result...

Страница 34: ...after a compression attempt than the native uncompressed size then the record is written in its native form The intelligent data compression utilizes two compression schemes Scheme 1 is a LZ1 based compression scheme using a history buffer to achieve data compres sion Scheme 2 is a pass through compression scheme designed to pass uncompressible data through with minimal expansion There are three s...

Страница 35: ... Mean Time Between Failures on page 40 LTO Cartridge Specifications on page 41 Regulatory Compliance on page 42 Physical Specifications Table 4 below lists the physical specifications of the LTO 2 half height drive Table 4 Physical Specifications Specification Internal SCSI Drive without Bezel Internal SCSI Drive with Bezel Height 1 6 inches 41 0 mm max 1 69 inches 43 1 mm Width 5 75 inches 146 05...

Страница 36: ...ons of the internal LTO 2 half height drive Figure 11 Internal LTO 2 Half Height Drive Dimensions 226 5 O ALL LENGTH INCL CONECTORS THIS HOLE 3 0 10 0 40 75 4X M3 0 X 5 0 0 5 47 4 52 9 79 2 2X M3 0 NEARSIDE 2X M3 0 FARSIDE 3X 5 0 5 0 BEZEL THICKNESS 2 4 146 0 140 0 144 8 221 0 ...

Страница 37: ... or 10 5 00 or 5 Non operating max voltage 14 Volts peak 7 Volts peak Max operating current Continuous Peak 1 0 amps RMS 2 0 amps 1 sec max 3 5 amps max RMS N A Standby current max 1 0 amps RMS 2 0 amps RMS Ripple peak to peak 100 mV 100 mV RMS parameters measured at the power connector using a true RMS digital meter Table 6 Power Dissipation Specification LTO 2 Max Standby Power 17 watts RMS Max ...

Страница 38: ...er write Reed Solomon ECC 2 levels Recording unrecoverable errors 1 in 1017 data bits Recording undetectable errors 1 in 1027 data bits Tape drive type LTO Ultrium Head configuration 16 thin film write heads 16 MR read heads 4 MR servo heads During operation 8 write heads 8 read heads and 2 servo heads are active at the same time Recording format Ultrium 8 channel U 18 Recording method 0 13 11 RLL...

Страница 39: ...nternal 9 CFM front to back N A Thermal gradient 11 C per hour 10 40 C 11 C per hour 10 40 C Relative humidity 20 to 80 non condensing 10 to 95 non condensing Humidity gradient 10 per hour 10 per hour Altitude max 10 000 feet MSL at 25 C 40 000 feet power off Shock 1 2 sine wave 10 Gs peak 11 msec 25 Gs peak 11 msec Vibration sweep test 0 005 inches DA 5 43 Hz 0 20 G peak 43 1000 Hz sweep rate 5 1...

Страница 40: ...TTR for LTO products is less than 0 5 hour 30 minutes The Certance LTO drives are field replaceable units If a problem occurs with a subassembly or com ponent in the drive you should replace the entire unit Return the drive to the factory in its original packaging Contact your distributor dealer your computer system company or your Certance sales representative to arrange the return Mean time betw...

Страница 41: ...cartridge The stray magnetic field at any point on the tape shall not exceed 4000 A m Cartridge Memory Each Ultrium cartridge has 4 Kbytes of nonvolatile memory 3 Kbytes are used to store tape directory and hardware specific information 1 Kbyte is available for application and OEM use The cartridge memory is powered read and written to via a radio frequency link Cartridge Reliability Recommended c...

Страница 42: ...SB safety certification South Korea JEON JEON safety certification Argentina Instituto Argentino de Racionaliza tion de Materiales IRAM IRAM safety certification China China Chinese Commodity Import Bureau CCIB CCIB safety certification EU member nations Comité Europèen de Normalisa tion Electrotechnique the European Committee for Electro technical Standardization CENELEC IEC 950 EN60950 including...

Страница 43: ...try Canada Digital Apparaus Interference Causing Equipment Standard ICES 003 ICES 003 Class B Digital Apparatus EU member nations CE Emissions per CISPR 22 1997 EN55022 1998 and Immunity per CISPR 24 1997 EN55024 1998 Australia and New Zealand Standards Australia Spectrum Management C Tick AS NZS 3548 1995 same as CISPR 22 Japan Voluntary Control Council for Interface VCCI This is a voluntary comp...

Страница 44: ...2 half height drive transfers data at 20 Mbytes per second with 2 1 compression of the data The drive supports the SCSI Ultra2 specification and can transfer data at burst rates of up to 32 Mbytes per second To achieve maximum drive performance it is important to choose high performance disk drives for your system as well as high performance SCSI controllers Table 13 below lists the types of SCSI ...

Страница 45: ...s tk TagQueueDepth 0 MaxTransferSize 0x0ffffff 16MB 1 ReadyTimeSeconds 180 seconds CMD_PreventAllow supported CMD_ExtReserveRelease supported BlockSize 0 PwrMgmt_capable 0 DENSITY DensityNumber 0 2 3 4 5 6 7 DensityCode default CompressionCode 0x0 Buffered 0x1 DENSITY DensityNumber 1 DensityCode default CompressionCode 0x1 Buffered 0x1 Save the file Then run the following command ddr_config c ddr_...

Страница 46: ...n use and the SCSI target devices installed For example the command dmesg egrep target sort uniq can find all SCSI controllers and SCSI targets The output may look similar to sd32 at ithps0 target2 lun0 sd34 at ithps0 target4 lun0 st21 at ithps1 target0 lun0 st22 at ithps1 target1 lun0 In this case the LTO 2 half height drive can be set for SCSI ID address 2 through 6 and attached to controller it...

Страница 47: ...kernel must be reconfigured by booting the system using the boot r command If you are replacing a tape device with the same SCSI ID you may want to delete the st devices from the dev rmt directory recommended When using commands that require a blocking factor such as tar or ufsdump we suggest a mini mum factor of 64 The preferred factor is 128 For commands that use density and tape size settings t...

Страница 48: ...s Set RETURN error on tape change or reset to no Set Use EXTENDED file marks to yes Set RESERVE RELEASE support to yes Set BLOCK SIZE for variable length support Num to 0 Set Density 1 to 0 6 Leave the Set delay and Set timeout lines at the default value 7 Click OK and the drive will be installed in the system database and devices created There is no need to reboot the system 8 Exit SMIT NOTE Reco...

Страница 49: ...stallation of the drive is performed using the following command mkdevtape A numeric based menu appears If you are replacing an existing SCSI tape drive use option 3 to remove the existing tape drive from the configuration files Then follow the instructions below to add an LTO 2 half height drive 1 From the menu choose Configure a SCSI or Enhanced IDE tape drive 2 From the next menu choose Install...

Страница 50: ...orks The following tape commands are not available for use with the LTO 2 half height drive getcomp setcomp the LTO 2 drives will always compress the data before writing the data to tape under SCO Open Server 5 0 x partition setpart getpart getspeed setspeed rsm wsm The following tape commands are available for use with the LTO 2 half height drive status load reset rewind retention getblk setblk u...

Страница 51: ...lutely sure that the control ler is not addressed for ID 7 The widely available distributions of Linux automatically install the proper SCSI and tape device driv ers If you executed the cat command above you have ensured that the SCSI driver for your con troller is installed To view currently loaded modules execute the lsmod command Ensure that one of the entries is st To view the st device number...

Страница 52: ...h the LTO 2 half height drive to IRIX the file scsi needs to be modified by a text editor The file can be found in var sysgen master d Open the file and use the text editor to add the following at the end of the tape device entries For IRIX 6 4 6 5 DATTAPE TPDAT 8 7 CERTANCE ULTRIUM 2 0 0 0 MTCAN_BSF MTCAN_BSR MTCAN_APPEND MTCAN_SETMK MTCAN_PREV MTCAN_SYNC MTCAN_SPEOD MTCAN_CHKRDY MTCAN_VAR MTCAN_...

Страница 53: ...e Description Tape 7 8 12 6 0 stape Claimed Device SEAGATE ULTRIUM From the root directory and as superuser issue the command sbin insf C tape Then issue the command sbin mksf d stape H x x x x I y c 1 n u dev rmt zcnb Where x is the data under H WPath from the ioscan y is the data under I from the ioscan z is the tape device identifier number You can execute an ls command for the dev rmt director...

Страница 54: ... In addition do not Attach the tape drives to a non LVD SCSI controller as this will degrade the performance of the tape drive and the performance of your backups Attach non LVD SCSI devices on the same bus cable as this will degrade the performance of the tape drive and your backups Connect the tape drive to a disk RAID controller as this is not supported If you are installing an adapter we recom...

Страница 55: ...SI HBA reduces the chances of installation difficulties arising from duplicate SCSI IDs on the same bus channel Ensure that the SCSI cable is of high quality and conforms to Ultra 2 SCSI specifications A lesser quality cable or a cable that does not conform to the Ultra 2 SCSI specification may cause intermit tent write read errors SCSI timeouts and corrupted data Troubleshooting Suggestions Compu...

Страница 56: ... one from a known working device such as a CD ROM If the Power LED is illuminated the problem was with the power connector Otherwise the tape drive may be bad and Technical Support should be contacted Desktop tape drive 1 Turn power off to the tape drive and reseat the AC power cord 2 Power on the tape drive and check the Power LED 3 If the Power LED is not illuminated use an AC power cord from a ...

Страница 57: ...native Windows operating system backup utility you must install the proper tape driver for the tape drive Red Hat Linux The tape driver for Red Hat Linux is called st This driver is automatically installed when Red Hat Linux is installed on your system When Red Hat Linux boots the operating system recognizes the tape drive and installs the tape drive as a device in the dev directory If this is the...

Страница 58: ...sure tape labels are only on proper tape surfaces and that labels are flat and not curled Ensure that tape drive opening is free of debris and tape labels Ensure that tape pin and tape are fully within the cartridge Attempt to insert a second tape if available 8 If a tape still cannot be inserted into the tape drive If you are inserting a cleaning cartridge be sure the cleaning tape is valid The t...

Страница 59: ...the Hardware or Firmware Error or Manual Intervention LED is flashing after the tape drive is rebooted the tape may be stuck Contact Technical Support Emergency Reset and Emergency Cartridge Eject In the unlikely event the LTO 2 half height drive stops communicating with the host computer use the following procedure to reset the drive and eject a cartridge if necessary To perform an emergency rese...

Страница 60: ... If the backup fails try to isolate the tape media vs tape drive Use diagnostic software to per form a write read test of 4GB of data The current data on the tape WILL BE OVERWRITTEN AND ALL PREVIOUSLY WRITTEN DATA ON THE TAPE WILL BE DESTROYED Use a second tape for the diagnostic test If the diagnostic test passes on the second tape use the tape for the backup process and remove the first tape fr...

Страница 61: ...up should be successful The first tape cannot be used for further backups If you insert a second tape for a backup and other tape alert messages appear in the backup software again the tape drive may be bad 4 If you start a backup and the software displays a message on the console a message similar to Overwrite protection is set to ______ Click OK to overwrite the media or insert new media that ca...

Страница 62: ...e This message means the tape drive does not recognize the cleaning tape as being of a valid type You may have purchased a cleaning tape that is not supported by the tape drive Purchase a sup ported cleaning tape 4 If the tape drive issues a message to backup software to instruct you to clean the tape drive you may see the message The tape drive needs cleaning 1 If the operation has stopped eject ...

Страница 63: ...rform write read test with diagnostic software This ensures a test of the connection between the tape drive and SCSI controller and removes the network data transfer and the backup software from the diagnosis The write read test WILL OVERWRITE DATA ON THE TAPE 2 When the test finishes determine the megabyte per second data transfer The resulting calcu lation shows the tape drive performing at an a...

Страница 64: ...9 Drive performance specifications Specifications drive performance 38 E Ejecting a cartridge 59 Electromagnetic compatibility 43 Emergency cartridge eject 59 Emergency reset 59 Environmental requirements 39 Error correction code 32 External drives quick start 14 F Features 11 Front panel display 25 G Guidelines internal drives 15 H HP UX 11 0 settings 53 I IBM AIX 4 1 x and later settings 47 Inje...

Страница 65: ...romagnetic compatibility 43 environmental requirements 39 injected noise 39 LTO cartridge 41 mean time between failures 40 physical 35 power 37 regulatory compliance 42 reliability 39 Sun Solaris 2 4 2 5 2 6 7 8 9 Unix settings 46 T Tape drive cleaning 29 registering 22 24 Tape drive not recognized by operating system or application 57 Tape drive troubleshooting 58 Tape drives covered in this User...

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