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Review the maintenance information in Chapter 3, "Operating the drive" and in the Warranty information document that comes with the tape drive, because periodic maintenance is not covered by the IBM warranty. Repairs or exchanges that result from improper maintenance might result in billable service charges.
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IBM Half High LTO Gen 5 SAS Tape Drive Installation and User's Guide Machine Type 3628 Model L5X and N5X...
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Note: Before using this information and the product it supports, read the general information in Appendix F, “Notices,” on page 77, the Safety Information and Environmental Notices and User Guide documents on the IBM Documentation CD, and the Warranty information and Important notices documents that come with the product.
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Antes de instalar este produto, leia as Informações sobre Segurança. Antes de instalar este producto, lea la información de seguridad. Läs säkerhetsinformationen innan du installerar den här produkten. Half-High LTO Gen 5 SAS Tape Drive Installation and User's Guide...
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Statement 1 DANGER Electrical current from power, telephone, and communication cables is hazardous. To avoid a shock hazard: v Do not connect or disconnect any cables or perform installation, maintenance, or reconfiguration of this product during an electrical storm. v Connect all power cords to a properly wired and grounded electrical outlet. v Connect to properly wired outlets any equipment that will be attached to this product.
Statement 3 CAUTION: When laser products (such as CD-ROMs, DVD drives, fiber optic devices, or transmitters) are installed, note the following: v Do not remove the covers. Removing the covers of the laser product could result in exposure to hazardous laser radiation. There are no serviceable parts inside the device.
Statement 8 CAUTION: Never remove the cover on a power supply or any part that has the following label attached. Hazardous voltage, current, and energy levels are present inside any component that has this label attached. There are no serviceable parts inside these components.
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viii Half-High LTO Gen 5 SAS Tape Drive Installation and User's Guide...
. 56 Australia and New Zealand Class A statement . 80 Hardware service and support . . 56 European Union EMC Directive conformance IBM Taiwan product service . . 56 statement . . 80 Germany Class A statement . . 81 Appendix B.
Inserting a cartridge into the drive . . 22 Attaching the leader pin to the tape . . 71 The IBM LTO Ultrium data cartridge . . 41 Removing the screws that secure the cover and Ultrium data cartridge on the left; WORM internal drive .
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Half-High LTO Gen 5 SAS Tape Drive Installation and User's Guide...
Preface This guide describes how to install and use both the internal and external IBM LTO Ultrium 5 Half-High Tape Drive in the following chapters: Chapter 1, “Introduction,” on page 1 describes the product, supported servers, operating systems, and device drivers, and lists hardware specifications.
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v Important: These notices provide information or advice that might help you avoid inconvenient or problem situations. v Attention: These notices indicate potential damage to programs, devices, or data. An attention notice is placed just before the instruction or situation in which damage might occur.
The tape drive is available as an internal or external device (L5X and N5X models). The L5X model of the tape drive includes a power cord for use in the United States; the N5X model does not include a power cord.
Table 1. CRU and Option part numbers Description CRU part number Option part number IBM Internal Half High LTO Gen 5 SAS 46X5683 49Y9898 Tape Drive IBM External Half High LTO Gen 5 SAS 49Y9907 3628L5X Drive, with US line cord...
Ready Encryption Cartridge light unload Fault light (green) button (amber) Single character display (SCD) Figure 4. Internal tape drive front panel element descriptions Rear panel of the drive Important: 1. The tape drive supports only one host connection. 2. The Ethernet port is only used by service personnel. Figure 5.
Ultrium 5 drives. In addition to using the IBM LTO Ultrium Data Cartridge with up to 1500 GB capacity, the drive also has read and write capabilities with certified LTO Ultrium tape cartridges.
Speed matching To improve system performance, the drive uses a feature called speed matching to dynamically adjust its native (uncompressed) data rate to the slower data rate of a server. With speed matching, the drive operates at different speeds when reading or writing the Ultrium 4 or Ultrium 5 cartridge formats.
® Application-managed encryption is supported on AIX , Windows Server, Linux and Solaris. Encryption requires the latest device drivers available on the IBM ftp download website: ftp://public.dhe.ibm.com/storage/devdrvr. For more information, see the IBM Tape Device Drivers Encryption Support and IBM LTO Ultrium Tape Drive SCSI Reference documentation.
External tape drive specifications The following sections show the physical, power, and environmental specifications for the external tape drive. For specifications for the internal tape drive, see “Internal tape drive specifications.” Specifications for tape cartridges are shown in “Environmental specifications.” Physical specifications Width 213 mm (8.4 in.)
Power specifications The internal tape drive receives power from the host system in which it is installed. Other specifications Maximum altitude for operating and storage 3,048 m (10,000 ft) Maximum altitude for shipping 12,192 m (40,000 ft) Environmental specifications Environmental factor Operating Storage or Shipping Drive temperature...
Internal or external tape drive v Power cord: – The L5X model of the external drive comes with a power cord for the United States. – The N5X model of the external drive does not include a power cord.
Unpack the drive Unpack the drive and store the packaging for future moves or shipping. Attention: If you return the unit for service, ship it in its original or equivalent packing material, or the warranty might be invalidated. Acclimate the drive and media Acclimation time is required if the temperature of the drive and media when unpacked is different than the temperature of its operating environment (measured at the front of the bezel near the air intake area).
Table 5. Feature switch definitions (continued) Switch On function Off function Enable ADI Enable LDI Reserved Reserved Disable head brush ERP Enable head brush ERP Reserved Reserved Note: The default settings for the feature switches are all switches placed in the off position.
Upper Side Mounting Holes Drive Air Intake Area Lower Side Mounting Holes 2.5mm (0.10 in.) Drive MAXIMUM Penetration Depth From OUTSIDE of Drive 5.0mm (0.20 in.) MAXIMUM Penetration Depth From OUTSIDE of Drive Figure 7. Mounting holes on the drive. The holes are located on both sides of the drive. The drive is shown with a front bezel.
remainder of the power-on and initialization phase. The status LED becomes solid green after the power-on/initialization and POST are complete. 6. Turn off the enclosure. 7. Disconnect the power cord from both the enclosure and the electrical outlet. Connect the internal cable Connect the enclosure internal SAS cable to the SAS connector on the drive.
Configure the drive to the server, switch, or hub To configure the drive to work with the server, see the documentation for that server, switch, or hub. The drive is now ready for use. Installing an external tape drive 1. Unpack the drive and store the packaging for future moves or shipping. Important: If you return the unit for service, ship it in its original or equivalent packing material, or the warranty might be invalidated.
It is your responsibility to make sure that the drive has the latest firmware. Periodically check for updated levels of drive firmware by visiting the IBM website. To download the latest firmware, go to http://www-947.ibm.com/systems/ support/supportsite.wss/docdisplay?lndocid=TAPE-FILES&brandind=5000019, or...
The SCD dot is solid if the dump is in RAM memory. The SCD dot flashes if the dump is in FLASH memory. The SCD dot turns off when you obtain a dump with IBM TotalStorage Tape Diagnostic Tool (ITDT) or a SCSI command) or update the drive firmware.
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Table 6. Meaning of status lights and single-character display (SCD) (continued) Ready Fault status Encryption SCD dot Meaning status light light status light Flashing On or off The drive is reading from the tape, green (once writing to the tape, rewinding the tape, per second) locating data on the tape, loading the tape, or unloading the tape.
Table 6. Meaning of status lights and single-character display (SCD) (continued) Ready Fault status Encryption SCD dot Meaning status light light status light Flashing Displaying An error occurred and the drive or amber (once error code media might require service, or it might per second) require cleaning.
Table 7. Functions that the Unload button performs (continued) Unload button function How to initiate the function Scroll through the While in Maintenance mode, press the Unload button once per second to increase the maintenance functions display character by one. When you reach the character of the diagnostic or maintenance function that you want (see “Diagnostic and maintenance functions”...
Figure 8. Inserting a cartridge into the drive Removing a tape cartridge Attention: To clean the tape drive, use only an IBM LTO Ultrium Cleaning Cartridge. The use of cleaning methods other than an LTO cleaning cartridge might cause damage to the drive.
Cleaning the drive head Attention: When cleaning the drive head, use the IBM LTO Ultrium Cleaning Cartridge. You can use another LTO cleaning cartridge, but it might not meet the standards of reliability established by IBM. Clean the drive head whenever is displayed on the single-character display and the status light is flashing amber once per second.
Table 8. Diagnostic and maintenance functions Function Diagnostic or maintenance function Instructions location code Exit Maintenance Mode: Causes the drive to become “Function code 0: Maintenance mode” on available for reading and writing data. page 26 Run Drive Diagnostics: Runs tests to determine whether “Function code 1: Run drive diagnostics”...
Table 8. Diagnostic and maintenance functions (continued) Function Diagnostic or maintenance function Instructions location code Load/Unload Test: Tests the ability of the drive to load “Function code L: Load/unload test” on and unload a tape cartridge. page 37 Enable Post Error Reporting: When selected, “Function code P: Enable post error deferred-check conditions are reported to the host.
Function code 0: Maintenance mode Function code makes the drive available for running drive diagnostics or maintenance functions. 1. Put the drive in Maintenance mode. For instructions, see “Entering Maintenance mode” on page 25. 2. To exit Maintenance mode, see “Exiting Maintenance mode” on page 25. The drive exits Maintenance mode automatically after it completes a maintenance function or after 10 minutes if no action has occurred.
Appendix C, “Error codes and messages,” on page 59. Push the Unload button to eject the cartridge. The drive exits Maintenance mode after the cartridge is removed. Contact IBM Technical Support for problem determination or machine replacement.
Function code 3: Create FMR tape Function code copies the drive field microcode replacement (FMR) data to a scratch data cartridge. The resulting FMR tape can only be used to update the firmware on other LTO Gen 5 tape drives with the same host interface (SAS). Attention: For this function, insert only a scratch (blank) data cartridge or a cartridge that can be overwritten.
3. Press and hold the Unload button for 3 or more seconds, then release it to select the function. The drive performs the dump. The SCD shows , then goes blank, and the drive exits Maintenance mode. To access the contents of the dump, see “Function code 5: Copy drive dump.”...
5. If you selected the drive will exit Maintenance mode. If you selected the SCD will change to a flashing while the procedure is being performed. After the procedure is completed the drive will exit Maintenance mode. If you selected the SCD will change to a flashing indicating that a data cartridge is to be inserted.
: exit 6. Press and hold the Unload button for 3 or more seconds, then release it to select one of the above functions. The drive automatically starts the test. If you cycle past the desired code, press the Unload button once per second until the code reappears.
Function code 8: Unmake FMR tape Function code erases the field microcode replacement (FMR) data and rewrites the cartridge memory on the tape. This converts the cartridge into a valid scratch (blank) data cartridge. To execute Function code 8: Unmake FMR tape, complete the following steps: 1.
5. After viewing all error codes, exit this function by pressing the Unload button again. The SCD will display and exit Maintenance mode. Function code A: Clear error code log Function code erases the contents of the error code log. To execute Function code A: Clear error code log, complete the following steps: 1.
1. Put the drive in Maintenance mode. For instructions, see “Entering Maintenance mode” on page 25. 2. Press the Unload button once per second until appears in the SCD. (If you cycle past the desired code, press the Unload button once per second until the code reappears.) 3.
2. Press the Unload button once per second until appears in the SCD. (If you cycle past the desired code, press the Unload button once per second until the code reappears.) 3. Press and hold the Unload button for 3 or more seconds, then release it to select the function.
To execute Function code H: Test head, complete the following steps: 1. Put the drive in Maintenance mode. For instructions, see “Entering Maintenance mode” on page 25. 2. Press the Unload button once per second until appears in the SCD. (If you cycle past the desired code, press the Unload button once per second until the code reappears.) 3.
example, Gen 3 media), error code appears in the SCD. In either case, the tape drive unloads the cartridge and exits Maintenance mode after the cartridge is removed. To execute Function code J: Fast read/write test, complete the following steps: 1.
4. Insert a scratch (blank) data cartridge. The SCD changes to a flashing the tape drive runs the tests. v If no error is detected, the diagnostic will loop and begin again. To stop the loop, press the Unload button for 1 second and release. When the loop ends, temporarily appears in the SCD.
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1. Put the drive in Maintenance mode. For instructions, see “Entering Maintenance mode” on page 25. 2. Press the Unload button once per second until either appears in the SCD. will appear in the SCD to indicate the current setting for post error reporting.
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Chapter 4. Using Ultrium media To make sure that your IBM Ultrium tape drive conforms to IBM's specifications for reliability, use only IBM LTO Ultrium tape cartridges. Other LTO-certified data cartridges might not meet the standards of reliability that are established by IBM.
Cartridge Memory chip (LTO-CM) All generations of IBM LTO Ultrium data cartridges include a Linear Tape-Open Cartridge Memory (LTO-CM) chip (see Figure 9 on page 41), that contains...
If the switch is in the locked position, (solid red), data cannot be written to the tape. If the switch is in the unlocked position (black void), data can be written to the tape. If you must manually set the write-protect switch, slide it left or right to the desired position.
Note: The drive will automatically eject an expired cleaning cartridge. IBM cleaning cartridges are valid for 50 uses. The cartridge LTO-CM chip tracks the number of times that the cartridge is used. Cartridge compatibility Table 9.
Incorrect handling or an incorrect environment can damage cartridges or their magnetic tape. To avoid damage to your tape cartridges and to ensure the continued high reliability of your IBM LTO Ultrium tape drives, use the following guidelines. Provide training v Post procedures that describe proper media handling in places where people gather.
spring clips (seeFigure 15 on page 66). If the leader pin has become dislodged, seeAppendix D, “Repairing a cartridge,” on page 65. v Do not handle tape that is outside the cartridge. Handling the tape can damage the tape surface or edges, which might interfere with read or write reliability. Pulling on tape that is outside the cartridge can damage the tape and the brake mechanism in the cartridge.
Figure 12. Double-boxing tape cartridges for shipping Environmental and shipping specifications for tape cartridges Before you use a tape cartridge, acclimate it to the operating environment to prevent condensation in the drive (the time will vary, depending on the environmental extremes to which the cartridge was exposed). The best storage container for the cartridges (until they are opened) is the original shipping container.
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If your local, state, country (non-U.S.A.), or regional regulations are more restrictive than EPA 40CFR261, you must review them before you dispose of a cartridge. Contact your account representative for information about the materials that are in the cartridge. If a tape cartridge must be disposed of in a secure manner, you can erase the data on the cartridge by using a high-energy ac degausser (use a minimum of 4000 oersted peak field over the entire space that the cartridge occupies).
Start 1. Try another electrical outlet. Does the 2. Try another power cord. tape drive 3. Refer to Appendix A in this document before you call IBM power on? Technical Support. 4. Contact IBM Technical Support. Y es Refer to Appendix A in this document before you call IBM Does air flow Technical Support.
4. Try loading or unloading another tape cartridge. v If the new cartridge loads or unloads properly, discard the cartridge that originally failed. v If the new cartridge does not load or unload properly, contact your IBM technical-support representative for additional problem determination. Note: 1.
Replacing the tape drive The drive is a Tier 1 customer replaceable unit (CRU). Replacement of Tier 1 CRUs is your responsibility. If IBM installs a Tier 1 CRU at your request, you will be charged for the installation. Chapter 5. Resolving problems...
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The following table lists the replaceable components. Table 11. CRU and Option part numbers Option part Description CRU part number number IBM Internal Half High LTO Gen 5 SAS Tape 46X5683 49Y9898 Drive IBM External Half High LTO Gen 5 SAS Drive, 49Y9907...
If you need help, service, or technical assistance or just want more information about IBM products, you will find a wide variety of sources available from IBM to assist you. This section contains information about where to go for additional information about IBM and IBM products, what to do if you experience a problem with your system, and whom to call for service, if it is necessary.
You can find service information for IBM systems and optional devices at http://www.ibm.com/supportportal/. Software service and support Through IBM Support Line, you can get telephone assistance, for a fee, with usage, configuration, and software problems with System x and xSeries servers, BladeCenter products, IntelliStation workstations, and appliances. For information about which products are supported by Support Line in your country or region, see http://www.ibm.com/services/supline/products/.
The server reads the flags from Log Sense Page 0x2E. See the IBM LTO Ultrium Tape Drive SCSI Reference document for the list of TapeAlert flags that are supported by this tape drive. To download the IBM LTO Ultrium Tape Drive SCSI Reference document (PDF), go to http://www-01.ibm.com/support/docview.wss?uid=ssg1S7001045&aid=1.
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3. If the problem persists, download new firmware and retry the operation. 4. If the problem persists, send the drive dump that you collected in step 1 to IBM Support. The error code clears when you place the tape drive in Maintenance mode.
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Table 12. Error codes on the SCD (continued) Error code Cause and action For Problems with Writing Data: If the problem occurred while the tape drive was writing data to the tape, retry the operation with a different cartridge: v If the operation succeeds, the original cartridge was defective. Copy the data from the defective cartridge and discard it according to the security policy for your organization.
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Table 12. Error codes on the SCD (continued) Error code Cause and action Media error. The tape drive determined an error occurred because of a faulty tape cartridge or an invalid tape cartridge. Make sure that the tape cartridge is the correct media type: v Ultrium 1 and Ultrium 2 tape cartridges are not supported in Ultrium 5 tape drives.
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Table 12. Error codes on the SCD (continued) Error code Cause and action Degraded operation. The tape drive determined that a problem occurred which degraded the operation of the tape drive, but it did not restrict continued use. If the problem persists, determine whether the problem is with the drive or the media.
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1. Check the host application to make sure that the host application is providing the correct encryption key. v See the IBM Tape Device Drivers Encryption Support documentation and the IBM LTO Ultrium Tape Drive SCSI Reference documentation for the Sense Data returned for an encryption operation.
If the leader pin in your cartridge becomes dislodged from its pin-retaining spring clips or detaches from the tape, you must use the IBM Leader Pin Reattachment Kit (part number 08L9129) to reposition or reattach it. Important: Do not reattach the pin if you must remove more than 7 m (23 ft) of leader tape.
Figure 15. Leader pin in the incorrect and correct positions. The cartridge door is open and the leader pin is visible inside the cartridge. To reposition the leader pin, see Figure 16 and complete the following steps: 1. Slide open the cartridge door and locate the leader pin. Note: If necessary, shake the cartridge gently to roll the pin toward the door.
To rewind the tape, see Figure 17 and perform the steps below. 1. Insert the cartridge manual rewind tool into the cartridge hub and turn it clockwise until the tape becomes taut. 2. Remove the rewind tool by pulling it away from the cartridge. 3.
Figure 18. Leader Pin Reattachment Kit The parts included in the Leader Pin Reattachment Kit are: Leader pin attach tool A plastic brace that holds the cartridge door open. Cartridge manual rewind tool A device that fits into the cartridge hub and lets you wind the tape into and out of the cartridge.
To reattach a leader pin by using the IBM Leader Pin Reattachment Kit, see Figure 19 and perform the steps below. 1. Attach the leader pin attach tool to the cartridge so that the hook latches into the cartridge door.
To find the end of the tape inside the cartridge, see Figure 20 and complete the following steps: 1. Attach the cartridge manual rewind tool to the cartridge hub by fitting the tool teeth between the teeth of the hub. 2.
To attach the leader pin to the tape, see Figure 22 and complete the following steps: 1. Position the tape in the alignment groove of the leader pin attach tool. 2. Place a new C-clip into the retention groove on the leader pin attachment tool and make sure that the open side of the clip faces up.
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Appendix E. Information for trained service personnel Attention v The drive and stuck tape should be returned to IBM for removal and recovery. v These procedures must be performed only by a trained IBM service provider. SSRs should claim their time against service code 33 ECA 013 when performing this procedure.
Figure 23. Removing the screws that secure the cover and internal drive 5. Return the unit to its upright position. 6. Gently push on the rear panel of the drive to remove the chassis from the cover (see Figure 24 on page 75). Half-High LTO Gen 5 SAS Tape Drive Installation and User's Guide...
Removing the internal drive Figure 24. Removing cables from the internal drive 1. Disconnect the SAS interface cable and the Ethernet interface cable (see Figure 24) from the drive. Disconnecting the internal SAS interface cable disconnects both the SAS interface and electrical power from the drive. Attention: Do not disconnect the internal power cable.
Consult your local IBM representative for information on the products and services currently available in your area. Any reference to an IBM product, program, or service is not intended to state or imply that only that IBM product, program, or service may be used. Any functionally equivalent product, program, or service that does not infringe any IBM intellectual property right may be used instead.
A current list of IBM trademarks is available on the web at “Copyright and trademark information” at http://www.ibm.com/ legal/copytrade.shtml. Adobe and PostScript are either registered trademarks or trademarks of Adobe Systems Incorporated in the United States and/or other countries.
IBM makes no representations or warranties with respect to non-IBM products. Support (if any) for the non-IBM products is provided by the third party, not IBM. Some software might differ from its retail version (if available) and might not include user manuals or all program functionality.
In the request, be sure to include the publication part number and title. When you send information to IBM, you grant IBM a nonexclusive right to use or distribute the information in any way it believes appropriate without incurring any obligation to you.
Klasse A ein. Um dieses sicherzustellen, sind die Geräte wie in den Handbüchern beschrieben zu installieren und zu betreiben. Des Weiteren dürfen auch nur von der IBM empfohlene Kabel angeschlossen werden. IBM übernimmt keine Verantwortung für die Einhaltung der Schutzanforderungen, wenn das Produkt ohne Zustimmung der IBM verändert bzw.
914-499-1900 Der verantwortliche Ansprechpartner des Herstellers in der EU ist: IBM Deutschland Technical Regulations, Department M456 IBM-Allee 1, 71137 Ehningen, Germany Telephone: +49 7032 15-2937 E-mail: tjahn@de.ibm.com Generelle Informationen: Das Gerät erfüllt die Schutzanforderungen nach EN 55024 und EN 55022 Klasse...
Russia Electromagnetic Interference (EMI) Class A statement People's Republic of China Class A electronic emission statement Taiwan Class A compliance statement Appendix F. Notices...
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A circuit board that adds function to a computer. Adjustment. Advanced Interactive Executive. IBM’s implementation of the UNIX operating system. The RS/6000 system, among others, uses AIX as it's operating system. alphanumeric Pertaining to a character set that contains letters, numerals, and usually other characters, such as punctuation marks.
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assignment The naming of a specific device to perform a function. asynchronous Pertaining to two or more processes that do not depend upon the occurrence of specific events such as common timing signals. attention (notice) A word for calling attention to the possibility of danger to a program, device, or system, or to data.
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cartridge manual rewind tool A device that can be fitted into the reel of a cartridge and used to rewind tape into or out of the cartridge. cartridge storage slot Individual slot located within a magazine that is used to house tape cartridges.
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data Any representations such as characters or analog quantities to which meaning is or might be assigned. data buffer The storage buffer in the control unit. This buffer is used to increase the data transfer rate between the control unit and the channel. data cartridge A tape cartridge dedicated to storing data.
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drive, magnetic tape A mechanism for moving magnetic tape and controlling its movement. Drive. Data security erase. Digital signal processor. EBCDIC Extended binary-coded decimal interchange code. Edge connector. Engineering change. Error correction code. EEPROM Electrically erasable programmable read-only memory. Electronics Industries Association. EIA unit A unit of measure, established by the Electronic Industries Association, equal to 44.45 millimeters (1.75 inches).
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field replaceable unit (FRU) An assembly that is replaced in its entirety when any one of its components fails. file A named set of records stored or processed as a unit. Also referred to as a dataset. file protection The processes and procedures established in an information system that are designed to inhibit unauthorized access to, contamination of, or deletion of a file.
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IBM Ultrium Tape Drive Located within the library, a data-storage device that controls the movement of the magnetic tape in an IBM LTO Ultrium Tape Cartridge. The drive houses the mechanism (drive head) that reads and writes data to the tape.
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Light-emitting diode. Linear Tape-Open (LTO) A type of tape storage technology developed by the IBM Corporation, Hewlett-Packard, and Certance. LTO technology is an “open format” technology, which means that its users will have multiple sources of product and media. The “open” nature of LTO technology enables compatibility between different vendors' offerings by ensuring that vendors comply with verification standards.
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Pertaining to the bar code on the bar code label of the IBM Ultrium Tape Cartridge, a 2-character code, L1, that represents information about the cartridge. L identifies the cartridge as one that can be read by devices which incorporate LTO technology;...
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modifier That which changes the meaning. mount a device To assign an I/O device with a request to the operator. Microprocessor. Millisecond. Message. multipath Pertaining to using more than one path. Not applicable. node In a network, a point at which one or more functional units connect channels or data circuits.
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Portable Document Format. Parity error. Product engineer. pick Pertaining to the library, to remove, by means of a robotic device, a tape cartridge from a storage slot or drive. picker A robotic mechanism located inside the library that moves cartridges between the cartridge storage slots and the drive.
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robot Picker. robotics Picker assembly. Request for price quotation. Read/write. Seconds of time. Service Action Code. Code developed to indicate possible FRU or FRU's to replace to repair the hardware. Serial attached SCSI interface. scratch cartridge A data cartridge that contains no useful data, but can be written to with new data.
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v Ultra160 SCSI: Uses a 16-bit bus and supports data rates of 80 or 160 MBps. Sense. special feature A feature that can be ordered to enhance the capability, storage capacity, or performance of a product, but is not essential for its basic work. Service representative, see also CE.
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utilities Utility programs. utility programs A computer program in general support of the processes of a computer; for instance, a diagnostic program. Under voltage. VOLSER Volume serial number. volume A certain portion of data, together with its data carrier, that can be handled conveniently as a unit.