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ArrayMasStor J Series User’s Manual

6 5

 Appendix B   Accessories

Accessories for the  ArrayMasStor (AXRR-JxxxS-(T).

•

 

Support Angle for installation to cabinet ( with M6 screws and floating knot )                1 set
* shipped only with Rack model ( not included with AXRR-JxxxS-T model )

      * may not fit on some of the EIA 19” cabinet

•

 

SCSI Terminator (Part No.: A208243 )                                                                               x 1

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Power Cable ( Part No.: A208079 )

                                          

    x 2

•

 

Drive Lock Key ( Part No.: A200213 )

    x 2

•

 

Power On/Off Key ( Part No.: A207183 )

    x 2

•

 

ArrayMasStor J series User’s Manual ( this booklet ) ( Part No.: A208233 )                     x 1

Summary of Contents for ArrayMasStor

Page 1: ...ArrayMasStor J Series 19 Rack Model Tower Model USER S MANUAL P N A208233 Revision 1 2e ...

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Page 3: ...e condensation of humidity to form on the ArrayMasStor Do not use the subsystem where it will not evaporate l Do not install the ArrayMasStor near electronic components with strong electromagnetic fields such as televisions or loud speakers l Turn off the power before moving connecting or disconnecting the ArrayMasStor This will prevent vibrations or mechanical shocks from damaging the hard disk d...

Page 4: ...ptimum performance the total length of the SCSI bus should be as short as possible The total cable length must be less than 1 5 m for single ended mode and 12m for LVD mode l A maximum of two host computers can be connected to the ArrayMasStor in a dual host configuration l Set the ArrayMasStor s UNIX2 C H S mode before connecting it to the operating systems shown below Changing the UNIX C H S mod...

Page 5: ...erative when a drive fails However if two or more drives fail all of the data may not be recoverable And if any other parts of the ArrayMasStor malfunction there is possibility of data loss l It is strongly recommended that the surface verification check implement before dynamic data reallocation l It is strongly recommended that an interruptible power supply UPS be used with the ArrayMasStor to a...

Page 6: ...TING THE PASSWORD 16 3 5 SETTING THE TIME DATE 16 3 6 SETTING THE SCSI ID 16 3 7 SETTING THE SPARE MODE AND RECONFIGURING THE LUN 16 3 8 FORMATTING 16 3 9 CONNECTION TO A MACINTOSH 16 3 10 CONNECTION TO THE UNIX SYSTEMS 17 4 ARRAYMASSTOR J SERIES OPERATIONS 18 4 1 OPERATION BUTTONS 18 4 2 STATUS DISPLAY MAIN MENU 19 4 2 1 Normal Mode 19 4 2 2 Degraded Mode drive failure 20 4 2 3 Drive Replacement ...

Page 7: ... 41 4 9 6 Changing the Buzzer Mode 41 4 9 7 Configuring the Write Cache Mode 42 4 9 8 Changing the Automatic Reconstruction Mode 43 4 9 9 Maximum SCSI Transfer Rate 44 4 9 10 DPO FUA Bit 45 4 9 11 Changing the AIX Error Notice Mode 46 4 9 12 Changing the UNIX C H S Mode 47 4 9 13 Performing Surface Check 48 4 9 14 Stopping Surface Check 49 4 9 15 Background Surface Check 50 4 9 16 Setting Initiato...

Page 8: ...Series User s Manual V I I APPENDIX D REPLACEMENT PARTS 67 APPENDIX E FEATURE SETTING 68 ELECTRONIC EMISSION NOTICES 69 FEDERAL COMMUNICATIONS COMMISSION FCC STATEMENT 69 FCC WARNING 69 INFORMATION 70 MANUFACTURER 70 ...

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Page 10: ...eries l Stores a large capacity data securely with excellent performance and data availability l Allows a failed drive to replace without interrupting system operation Data reconstruction starts automatically upon drive replacement l Data reconstruction onto the spare drive starts immediately when a drive fails hot spare mode l Improves write performance with large capacity cache buffer l Recogniz...

Page 11: ... over all of the drives in the array This provides the maximum storage capacity since the entire array is used solely for data storage and the ArrayMasStor s input output performance is maximized because of the drives parallel processing ability IMPORTANT In RAID Level 0 there is no data redundancy Data will be lost if a drive fails The effective storage capacity of this RAID level is as follows E...

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Page 13: ...e degradation due to the intensive access requirements that would result from using a single or specific parity drive The effective storage capacity of this RAID level is as follows Effective storage capacity Capacity of one drive x Number of drives 1 This RAID level is most appropriate when data protection is the primary consideration BLOCK 0 BLOCK 1 BLOCK 2 PARITY 0 2 3 4 5 PARITY 3 5 6 7 8 PARI...

Page 14: ...ogical units LU and that a different RAID level can be assigned to each LU The ArrayMasStor can support up to seven separate LU 0 6 and separate RAID levels A sample configuration is shown below LUN DESIGNATION HOST CONFIGURATION LUN 0 RAID 0 LUN 1 RAID 1 LUN 2 RAID 5 LUN 3 RAID 0 LUN 3 LUN 2 LUN 1 LUN 0 LUN 3 LUN 2 LUN 1 LUN 0 LUN 3 LUN 2 LUN 1 LUN 0 LUN 3 LUN 2 LUN 1 LUN 0 ...

Page 15: ...After the data recovery process is complete the ArrayMasStor is redundant fault tolerant again In the following example there are four drives in the ArrayMasStor The hot spare feature is only available when more than three drives are used When one of the on line drives fails the data recorded on the failed drive is re generated and written onto the spare drive After the data recovery process is co...

Page 16: ...mall amounts of write data to the cache buffer and writes this data onto the drives at one time When shutting down the ArrayMasStor using the power switch on the front panel the ArrayMasStor s firmware detects the power switch status flushes the data in the cache to the drives and then turns off the power When powering down from the AC line a synchronize cache command must be sent from the host co...

Page 17: ...but there is no data redundancy when the re stripping or reallocation procedure is executed Increasing the number of drives allows the same total storage capacity to be accessed faster because four rather than three drives are concurrently accessing the 40 MB of data in each LUN Each new LUN is treated as an individual drive by the host computer and is easily configured from the operating system f...

Page 18: ...ArrayMasStor J Series User s Manual 9 2 Naming Convention 2 1 Front view Front cover rackmount type 1 Screw for Front Cover 2 Drive Access Status LED 3 Display Panel ...

Page 19: ...Ltd 1 0 Removal of Front cover rackmount type 1 Power LED 2 Host Access LED 3 Power switch 4 Drive lock 5 Drive unit 1 6 Drive unit 2 7 Drive unit 3 8 Drive unit 4 9 Drive access LED 10 Operation buttons 11 Fan Module 12 Fan module screw ...

Page 20: ...ArrayMasStor J Series User s Manual 1 1 Front cover tower type 1 Screw for Front Cover 2 Drive Access Status LED 3 Display Panel ...

Page 21: ...o Ltd 1 2 Removal of Front cover tower type 1 Power LED 2 Host Access LED 3 Power switch 4 Drive lock 5 Drive unit 1 6 Drive unit 2 7 Drive unit 3 8 Drive unit 4 9 Drive access LED 10 Operation buttons 11 Fan Module 12 Fan module screw ...

Page 22: ...ser s Manual 1 3 2 2 Rear view rackmount type 1 SCSI connector Dual channel 68 pins VHDCI connector 2 Power supply switch Normal ON I is pressed in 3 Power cord receptacle 4 Power Module screw 5 Power supply status indicator ...

Page 23: ...and Systems Co Ltd 1 4 Rear View tower type 1 SCSI connector Dual channel 68 pins VHDCI connector 2 Power supply switch Normal ON I is pressed in 3 Power cord receptacle 4 Power Module screw 5 Power supply status indicator ...

Page 24: ...voltage detection CAUTION Simply plugging the AC power cord will not mean that the ArrayMasStor is in POWER ON condition 3 2 Connecting the SCSI Cable Use a SCSI cable meeting SCSI 2 or SCSI 3 specifications to connect the ArrayMasStor to the host computer s SCSI interface If the ArrayMasStor is located at the end of the SCSI bus attach a SCSI terminator to the unused SCSI connectors on the back o...

Page 25: ...lt changes to these settings must be made before creating partitions or formatting the storage area For information about setting the spare mode see section 4 10 1 Add Drive as Hot Spare Drive After setting the spare mode and the LUN configuration restart the ArrayMasStor The new settings will take effect after the initialization process is completed The spare mode does not need to be set if the d...

Page 26: ...connected to the following operating systems Solaris SPARC 2 X IRIX 5 X The configuration file in Sun OS Solaris 2 5 1 2 6 must be edited to use the LUN Example To set two LUNs to the ArrayMasStor J Series at SCSI ID 0 SPARC station5 Turbo 170M File name to edit kernel dev sd conf Before Edit After Edit name sd class scsi name sd class scsi target 0 lun 0 target 0 lun 0 name sd class scsi target 0...

Page 27: ...uttons you can review the ArrayMasStor s status information or make changes to the ArrayMasStor s configuration 4 1 Operation Buttons There are four operation buttons The up and down buttons scroll from one menu item to the next The select button is used to activate the menu item shown on the display The Cancel button returns the display to the previous menu Cancel Down Up Select ...

Page 28: ...t settings for the number of online drives spare drives buzzer auto reconstruction mode write cache AIX error notice mode UNIX C H S mode ultra SCSI mode initiator mode periodic check and DPO FUA bit This option accesses the system status window which displays the current system status serial number microcode level system status code current system time and current system calendar status This opti...

Page 29: ...zer mode is switched on the buzzer beeps and STOP BUZZER appears on the display To turn the buzzer off press the select button When the buzzer mode is off this is replaced by the DRIVE n FAIL display as shown in the next figure This is the final display for degraded mode If a spare drive fails the system goes to degraded mode the drive number is displayed If a data drive and a spare drive fail sim...

Page 30: ...e start of data reconstruction press the select button If the cancel button is pressed the display returns to the main menu without starting reconstruction Press the select button to confirm The display indicates that data reconstruction has started and indicates the drive that is being reconstructed and the progress in percent of the reconstruction process When data reconstruction is complete the...

Page 31: ...s The time required for data initialization depends on the configuration and storage capacity of the ArrayMasStor During the data initialization the progress in percent is displayed When initialization is in progress the ArrayMasStor will not accept SCSI commands from the host computer When data initialization is complete the operation panel returns to the main menu and the ArrayMasStor accepts SC...

Page 32: ...2 8 Forced Data Reconstruction b During system halt replace the failed drives by following the procedures in section 4 2 9 System Halt The display indicates that the ArrayMasStor is in degraded mode 2 which means that two or more drives have failed This menu turns off the buzzer Pressing the select button advances the display to the stop buzzer menu The display indicates the physical numbers of th...

Page 33: ...rs on the display This menu appears when the source drive failed during normal reconstruction mode without replacement of the first failed drive Press the select button to start forced data reconstruction When the data reconstruction is complete the ArrayMasStor enters degrade mode when only one failed drive is left or degrade mode 2 when more than one failed drives are left except spare drive The...

Page 34: ...it will beep To stop the buzzer press the select button To turn off the buzzer press the select button again If the cancel button is pressed the display returns to the previous menu without turning off the buzzer Initialization erases all error information on the drives and returns the system to normal mode However during initialization all data is erased A password is necessary to start initializ...

Page 35: ...nce The display indicates that the fan has failed If the buzzer is switched on it will beep To stop the buzzer press the select button To turn off the buzzer press the select button again If the cancel button is pressed the display returns to the previous menu without turning off the buzzer The display returns to the main menu the FAN FAIL appears along with the ArrayMasStor s RAID level and total...

Page 36: ...above have been checked and the power supply failure still occurred Call a trained personnel if the power supply module to be replaced is done while the machine is in operation Please follow the procedure described in section 5 2 to replace the power supply module with the machine powered down The display indicates that the power supply has failed If the buzzer is switched on it will beep To stop ...

Page 37: ... consistency From the Change Configuration menu use the up or down button to choose the SURFACE CHECK option After selecting the SURFACE CHECK option the ArrayMasStor immediately checks the entire data storage area During the procedure the progress of the scan is displayed in percent When the scan is complete the display returns to the main menu Choose the PARITY CHECK option from the CHECK MODE m...

Page 38: ...el or to both channels Case 1 LUN0 are visible to both channels The LUN number RAID level and capacity information are shown on the display Pressing the select button will show the CHS information Press the select button to display the CHS information of LUN 0 Case 2 LUN0 is visible to channel n only The LUN number RAID level and capacity information are shown on the display Pressing the select bu...

Page 39: ...PARE DRIVE appears 4 6 3 Buzzer Mode The on off status of the buzzer is displayed When the buzzer is on it beeps when a failure occurs 4 6 4 Automatic Reconstruction Mode When automatic reconstruction mode is turned on data reconstruction starts automatically when a replacement drive is installed If both the hot spare drive and auto reconstruction mode are enabled data reconstruction on the spare ...

Page 40: ...n using the ArrayMasStor with non AIX operating system Failure to do so may cause the ArrayMasStor to malfunction 4 6 7 UNIX C H S Mode The UNIX C H S status is displayed When the ArrayMasStor is used with host computers using the UNIX operating system the C H S mode should be turned on 4 6 8 Ultra SCSI Mode When the ultra SCSI mode is turned on a maximum data transfer rate of 40MB second can be a...

Page 41: ...he DPO FUA disable page out force unit access is used only when the host computer s operating system issues the FUA command for every read write command Use of this command7 degrades the ArrayMasStor s performance To prevent this from happening the DPO FUA bit should be turned off IMPORTANT Only turn on the DPO FUA bit if your operating system uses the force unit accesses command with its read and...

Page 42: ...e auto reconstruction mode is turned off Use the operation buttons to start data reconstruction DEGRADE MODE 2 Two or more drives have failed Save all data onto backup media and replace the failed drives RECONSTRUCTION 2 Forced data reconstruction is in progress If a sector of the source drive cannot be read data reconstruction skips that sector and proceeds to the next sector REALLOCATION Data re...

Page 43: ...digits of the system status code are displayed For additional information about system status codes see section 4 7 1 System Status The last four digits of the system status code are displayed 4 7 5 System Status Time and Date Displays the time Displays the day and date SYSTEM STATUS S N XXXXXXXX SYSTEM STATUS MICRO JXXX SYSTEM STATUS CODE XXXXXXX SYSTEM STATUS MORE XXXXXXX SYSTEM STATUS TIME 10 1...

Page 44: ... and spare drives are swapped In this case the logical drive number will be different from the physical number DRIVE STATUS AND STATUS CODE DRIVE STATUS STATUS CODE Meaning ON LINE 000 The drive is operating normally FAIL 010 The drive has failed and should be replaced as soon as possible NO DMA33 010 The drive does not support Ultra DMA 33MB It should be replaced with a drive that supports Ultra ...

Page 45: ...ton to change the password configuration Use the up or down button to display the correct digit then press the select button to enter the digit Repeat this procedure until all four digits are entered See Appendix C for the default password Confirm the password by entering the four digit number Press the Select button to confirm The main menu is displayed after configuring the password RAID SUBSYST...

Page 46: ...button to choose a new value Press the select button to enter the new value Use the up or down button to choose a new value Press the select button to enter the new value Use the up or down button to choose a new value Press the select button to enter the new value Use the up or down button to choose a new value Press the select button to enter the new value Use the up or down button to choose a n...

Page 47: ...he cancel button to return the display to the change configuration menu without changing the SCSI ID Press the select button again Use the up or down button to choose a new SCSI ID for channel 2 Press the select button again to confirm Press the cancel button to return the display to change configuration menu without changing the SCSI ID The new SCSI ID will take effect when the ArrayMasStor is re...

Page 48: ...all of the data stored on the ArrayMasStor To confirm press the select button Pressing the cancel button aborts the change Use the up or down button to display spare assignment Press the select button to assign a single spare drive Use the up button to select the desired RAID level for the first available LUN Then press the select button to enter the new setting Press select button to confirm Ente...

Page 49: ...n to continue Press the select button to confirm Press the select button to configure additional LUN for multiple LUN configuration This displays the total number of LUN configured Press the select button to confirm The changes will take effect after the ArrayMasStor is restarted OR MORE LUN PRESS O OR X n LUNS CONFIGURED PRESS O OR X CHANGED RESET OR X TO CANCEL LUN ASSIGN SET HOST Ch1 Ch2 LUN AS...

Page 50: ... failure occurs From the change configuration menu use the up or down button to display BUZZER MODE Press the select button to choose this item Use the up or down button to choose ON or OFF and press the select button to accept the change Press the select button to confirm the change or press the cancel button to abort the change and return the display to the previous menu MODE CHANGED appears to ...

Page 51: ...the select button to access this menu Use the up or down button to choose ON or OFF and press the select button to enable or disable the write cache mode To confirm the change press the select button or press the cancel button to return the display to the previous menu without changing the write cache mode MODE CHANGED appears to confirm that the changed has been made Press the select button to re...

Page 52: ... up or down button to display AUTO RECON Press the select button to access this menu Choose ON or OFF by using the up or down button Then press the select button to enable or disable automatic reconstruction To confirm the change press the select button or press the cancel button to return the display to the previous menu without changing the automatic reconstruction mode MODE CHANGED appears to c...

Page 53: ...n to display ULTRA SCSI MODE Press the select button to access this menu Use the up or down button to choose ON or OFF and press the select button to enable or disable the ultra SCSI mode Press the select button to confirm the change or press the cancel button to return the display to the previous menu without changing the ultra SCSI mode MODE CHANGED appears to confirm that the changed has been m...

Page 54: ...s the select button to access this menu Use the up or down button to choose ON or OFF or press the select button to enable or disable the DPO FUA bit Press the select button to confirm the change or press the cancel button to return the display to the previous menu without changing the DPO FUA bit MODE CHANGED appears to confirm that the change has been made Press the select button to return to th...

Page 55: ... to occur From the change configuration menu use the up or down button to display AIX ERR NOTICE Press the select button to access this menu Choose ON or OFF by using the up or down button Then press the select button to enable or disable the AIX error notice mode To confirm the change press the select button Press the cancel button to return to the previous menu without changing the AIX error not...

Page 56: ...ult in data loss From the change configuration menu use the up or down button to display UNIX C H S Press the select button to access this menu Use the up or down button to choose ON or OFF and then press the select button to enable or disable the UNIX C H S mode To confirm the change press the select button or press the cancel button to return the display to the previous menu without changing the...

Page 57: ...strongly recommended that these checks implement to ensure data and parity consistency From the change configuration menu use the up or down button to display SURFACE CHECK Press the select button to access this menu Use the up or down button to display the desired mode then press the select button to confirm Pressing the cancel button returns the display to the previous menu Use up or down button...

Page 58: ...stopped under the CHANGE CONFIG Menu From the change configuration menu use the up or down button to display SURFACE CHECK Press the select button to choose this item Press the select button to stop the surface check The display return to the main menu after the select button is pressed CHANGE CONFIG SURFACE CHECK CHECK MODE CANCEL CHECK ...

Page 59: ...his menu Press the select button to confirm or press the cancel button to return to the display to the previous menu Press the select button to confirm or press the cancel button to return to the display to the previous menu Use the up or down button to set the interval for the background surface check Use the up or down button to set the start time hour for the background surface check Use the up...

Page 60: ...ut changing the initiator mode MODE CHANGED appears to confirm that the change has been made Press the select button to confirm the change The changes will take effect when the ArrayMasStor is restarted After the ArrayMasStor is restarted it acts as the initiator host Press the select button to continue Press the select button to confirm Press the cancel button to return to the previous display Pr...

Page 61: ...vailable when one of the drives has failed From the change configuration menu use the up or down button to display ERROR INSERTION Press the select button to access this menu Use the up or down button to choose the drive number that will be used in the simulated failure Press the select button to confirm the choice of drive The hot spare drive cannot be used as the target drive for the simulated f...

Page 62: ...cel button to return the display to the previous menu 4 9 19 Erasing the System Trace Data This function which deletes the system trace data should only be performed on the advice of qualified service personnel From the change configuration menu use the up or down button to display CLEAR TRACE Press the select button to erase the system trace data Press the select button to confirm Press the cance...

Page 63: ...the new drive a hot spare drive press the up or down button to display this menu and then press the select button To assign the capacity of additional drives as new LUN press the up or down button to display this menu and then press the select button To initialize the original drives and add a new drive press the up or down button to display this menu and then press the select button This display ...

Page 64: ...on to continue A password is necessary to change the ArrayMasStor s configuration For instructions on how to enter the password refer to section 4 9 1 Entering the Password To assign the new drive as a spare drive press the select button Press the select button again to confirm Pressing the cancel button returns the display to the previous menu and the spare drive will not be assigned The system g...

Page 65: ...nstructions on how to enter the password refer to section 4 9 1 Entering the Password Press the up and down buttons to display the ADD DRIVE INIT Press the select button to continue or the cancel button to return to the main menu To assign the new drive as data drive press the select button Once confirmed the ArrayMasStor is ready to be reconfigured Refer section 4 9 4 Reconfigure for instructions...

Page 66: ...s configuration For instructions on how to enter the password refer to section 4 9 1 Entering the Password Press the up and down buttons to display the ADD NEW LUN To assign the new drive as a new LUN press the select button Press the select button to confirm Press the cancel button to return to the previous display The display shows the RAID level n of the new LUN Press the up and down buttons to...

Page 67: ...system halt When the buzzer mode is switched on the buzzer beeps and STOP BUZZER appears on the display Press the select button to turn the buzzer off Press the select button to initialize the ArrayMasStor This will erase the data stored on the ArrayMasStor A password is necessary to start the initialization For instruction on how to enter the password refer to section 4 9 1 Entering the Password ...

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Page 69: ... located on the rear side 3 Disconnect all the cables Power cable X 2 SCSI cable and etc 4 Unscrew the failed power supply module 5 Pull out the failed power supply module 6 Install the replacement power supply module 7 Screw the fix screws 2X of the power supply 8 Reconnect all the cables that were disconnected in procedure no 3 9 Set the power switch to 1 of the power supply module located on th...

Page 70: ... fingers into the removed area Replacement Procedure 1 Unscrew and remove the front cover See 2 1 Front side 2 Unscrew the fan module refer below 3 Pull out the fan module 4 Install the replacement fan module 5 Fasten the fan module using the fix screws 6 Install the front cover IMPORTANT The FAN FAIL indication will be erased within one 1 minute Call your sales representative for repair if FAN FA...

Page 71: ...Advanced Technology and Systems Co Ltd 6 2 5 4 Other Failures If replacing new drive unit fan module or power supply module doesn t solve any troubles contact your sales representative ...

Page 72: ... RAID 1 capacity 46GB 69GB 92GB RAID 5 capacity N A 92GB 138GB RAID level 0 1 1 0 1 5 2 0 1 5 Host interface SCSI 3 Single Ended LVD Max transfer rate 40MB s Cache buffer 64MB Max number of drives 2 3 4 HDD Capacity 46GB 46GB 46GB AXRR J762S T AXRR J763S T AXRR J764S T RAID 0 capacity 153GB 230GB 307GB RAID 1 capacity 76 8GB 115GB 153GB RAID 5 capacity N A 153GB 230GB RAID level 0 1 1 0 1 5 2 0 1 ...

Page 73: ...ure 5 40o C Humidity 10 90 non condense Power 100 240 V AC 50 60Hz Current 1 0 A 100V Capacity refers to the approximate storage capacity when used in RAID levels 0 1 and 5 without a spare drive The actual capacity depends on the operating system the number of drives and the configuration The specifications or physical appearance of the ArrayMasStor may change without prior notice ...

Page 74: ...ith M6 screws and floating knot 1 set shipped only with Rack model not included with AXRR JxxxS T model may not fit on some of the EIA 19 cabinet SCSI Terminator Part No A208243 x 1 Power Cable Part No A208079 x 2 Drive Lock Key Part No A200213 x 2 Power On Off Key Part No A207183 x 2 ArrayMasStor J series User s Manual this booklet Part No A208233 x 1 ...

Page 75: ...0 Number of LUN 1 RAID level More than 3Drive Model 5 2Drive Model 1 Hot spare drive No Buzzer mode On Auto reconstruction mode On Cache buffer mode On AIX Off UNIX C H S Off Ultra SCSI On Initiator mode Off Background surface verify On Period of surface verify Weekly Start time Sunday at 00 00 Execution time 60 minutes DPO FUA bit OFF Password 1 2 3 4 ...

Page 76: ...76 S drives Replacement Box for AXRR JxxxS A208244 Replacement for AXRR JxxxS except drive units and RAID controller card Replacement Box for AXRR JxxxS T A208245 Replacement for AXRR JxxxS T except drive units and RAID controller card Replacement RAID controller card A208246 Support angle for installation to cabinet A208224 Shipped with rackmount type machine only Replacement power supply module ...

Page 77: ...f drives configured Refer the chart when changing the ArrayMasStor configuration No of Drives Feature RAID Level Spare 1 2 3 4 5 Assigned X X X O 5 Not assigned X X O O 1 Assigned X X O O 1 Not assigned X O O O 0 Assigned X X X X 0 Not assigned X O O O Where O means configuration is ALLOWED X means configuration is NOT ALLWED ...

Page 78: ... reception which can be determined by turning the equipment off and on the user is encouraged to try to correct the interference by one or more of the following measures Reorient or relocate the receiving antenna Increase the separation between the equipment and receiver Connect the equipment into an outlet on a circuit different from that to which the receiver is connected Consult the dealer or a...

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