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Contents

QuantumLTO-8 HH SAS User’s Guide

Function Code P: Post Error Reporting Enabled . . . . . . . . . . . 64
Function Code U: Post Error Reporting Disabled . . . . . . . . . . . 64

Chapter 5

Media

Data Cartridge. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
Cartridge Compatibility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71

Capacity Scaling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72

WORM (Write Once, Read Many) Cartridge . . . . . . . . . . . . . . . . . . . . . 72

Worm Media. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72
Data Security on WORM Media. . . . . . . . . . . . . . . . . . . . . . . . 73
WORM Media Errors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
Requirements for WORM Capability . . . . . . . . . . . . . . . . . . . . 73
Cleaning Cartridge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
Cartridge Memory Chip (LTO-CM). . . . . . . . . . . . . . . . . . . . . . 74

LTO-8 Type M Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
Bar Code Labels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75

Write-Protect Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77

Handling Cartridges. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78

Provide Training . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78
Ensure Proper Packaging. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78
Provide Proper Acclimation and Environmental Conditions . . 79
Perform a Thorough Inspection . . . . . . . . . . . . . . . . . . . . . . . 79
Handle the Cartridge Carefully . . . . . . . . . . . . . . . . . . . . . . . . 80

Examples of Cartridge Problems . . . . . . . . . . . . . . . . . . . . . . . 81

Environmental and Shipping Specifications for Tape Cartridges . . . . . 81
Disposing of Tape Cartridges. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82

Chapter 6

Troubleshooting

Procedure 1: Determining Firmware Level and Capturing Drive Dump 85
Procedure 2: Inspecting a Cartridge for Damage. . . . . . . . . . . . . . . . . 86
Procedure 3: Checking SAS Host Connections . . . . . . . . . . . . . . . . . . . 87
Resolving Problems Reported by the Server. . . . . . . . . . . . . . . . . . . . . 88

Fixing SAS Bus Errors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88

Resolving Media-Related Problems . . . . . . . . . . . . . . . . . . . . . . . . . . . 88

Summary of Contents for LTO-8 HH SAS

Page 1: ...Technical Reference Manual Quantum LTO 8 HH SAS User s Guide 6 68132 03 Rev A...

Page 2: ...um Corporation is prohibited by law and constitutes a punishable violation of the law TRADEMARK STATEMENT Quantum the Quantum logo DLT DLTtape the DLTtape logo SuperLoader Scalar StorNext and DXi are...

Page 3: ...g the Safety Inspection Procedure 3 Tape drive AC grounding inspection 4 Class I Laser Product 5 Rack Safety 5 Power Cords 8 Product Recycling and Disposal 8 Battery Return Policy 9 End of Life EOL Pl...

Page 4: ...Port 19 IBM Spectrum Archive 20 Specifications 20 Physical specifications 20 Power specifications 21 Other specifications 21 Environmental specifications 21 Chapter 3 Installation 23 Avoiding Drive Da...

Page 5: ...ing Maintenance Mode 48 Function Code 0 Maintenance Mode 49 Function Code 1 Run Drive Diagnostics 49 Function Code 2 Update Drive Firmware from FUP Tape 50 Function Code 3 Create FUP Tape 51 Function...

Page 6: ...bels 75 Write Protect Switch 77 Handling Cartridges 78 Provide Training 78 Ensure Proper Packaging 78 Provide Proper Acclimation and Environmental Conditions 79 Perform a Thorough Inspection 79 Handle...

Page 7: ...Contents QuantumLTO 8 HH SAS User s Guide vii Pre Call Checklist 89 Appendix A Error Codes and Messages 91 Appendix B Tape Alert Flags 101...

Page 8: ...Contents viii QuantumLTO 8 HH SAS User s Guide...

Page 9: ...f the Single character Display It gives instruction on inserting and removing a tape cartridge describes methods of updating drive firmware and explains how to clean the tape drive It also lists diagn...

Page 10: ...dous to people A lightning bolt symbol always accompanies a danger notice to represent a dangerous electrical condition A sample danger notice follows WARNING An electrical outlet that is not correctl...

Page 11: ...n battery To avoid possible explosion do not burn Exchange only with the Quantum approved part Recycle or discard the battery as instructed by local regulations Caution The system contains circuit car...

Page 12: ...for proper fit It should be in place and secure 9 Check the product label on the tape drive to make sure that it matches the voltage at your outlet Tape drive AC grounding inspection 1 Power off the d...

Page 13: ...r all rack mounted devices DANGER Always lower the leveling pads on the rack cabinet Always install stabilizer brackets on the rack cabinet To avoid hazardous conditions due to uneven mechanical loadi...

Page 14: ...ing labels located on the equipment in the rack to determine the total power requirement of the supply circuit For sliding drawers Do not pull out or install any drawer or feature if the rack stabiliz...

Page 15: ...x 2032 mm 30 x 80 in Ensure that all devices shelves drawers doors and cables are secure Ensure that the four leveling pads are raised to their highest position Ensure that there is no stabilizer brac...

Page 16: ...ertified cord set consisting of a minimum 18 AWG Type SVT or SJT three conductor cord a maximum of 15 feet in length and a tandem blade grounding type attachment plug rated 15 amperes 250 volts For un...

Page 17: ...r specific battery information The battery must be recycled or disposed of properly Recycling facilities may not be available in your area For information on disposal of batteries contact your local w...

Page 18: ...ing notice is provided in accordance with California Code of Regulations Title 22 Division 4 5 Chapter 33 Best Management Practices for Perchlorate Materials This product part may include a lithium ma...

Page 19: ...y data storage device that is designed to back up and restore open systems applications It is the sixth generation in the Ultrium series of products and is available with a Serial Attached SCSI interf...

Page 20: ...um native data transfer rate of up to 300 MB per second Burst data transfer rate of 600 MB per second Dual port 6 Gbps Serial Attached Small Computer Systems Interface SAS Half height form factor Supp...

Page 21: ...tumLTO 8 HH SAS User s Guide 13 Front Panel of the Drive Figure 3 Front panel element descriptions 1 Cartridge unload button 2 Ready light green 3 Encryption light white 4 Fault light amber 5 Single C...

Page 22: ...r drive status and service only Drive Performance If you run applications that are highly dependent on tape processing speed take advantage of the significant performance improvements provided by this...

Page 23: ...he Quantum Ultrium Tape Drive Generation 7 The drive performs the following functions Reads and writes Ultrium 8 cartridges to Ultrium 8 format including WORM and Data Encryption Reads and writes Ultr...

Page 24: ...are as follows in the table below Table 2 Performance Parameters If the server s net compressed data rate is between two of the preceding native data rates the drive calculates the appropriate data ra...

Page 25: ...access As an example a customer could capacity scale a data cartridge to 20 of its normal length which improves the average access time by almost a factor of 5 however it also reduces the native capa...

Page 26: ...by the host application No checking is done if the firmware level is loaded by way of the host interface or the library interface SAS Interface The drive has a dual port 6 Gbps SAS Serial Attached SC...

Page 27: ...ice drivers for the drive on the Internet You can access this material at the web site http www quantum com serviceandsupport Note If you do not have Internet access and you need information about dev...

Page 28: ...folder tree structure Using the host operating system s graphical file manager reading data on a LTO tape cartridge is as easy as dragging and dropping Users can run any application designed for disk...

Page 29: ...at 100 Vac 0 48 A Line current at 240 Vac 0 20 A Specification Measurement Maximum altitude for operating and storage 3048 m 10 000 ft Maximum altitude for shipping 12192 m 40 000 ft Environmental Fac...

Page 30: ...Chapter 2 Introduction Specifications 22 QuantumLTO 8 HH SAS User s Guide...

Page 31: ...e on page 24 Verify the Shipment on page 25 Inspect the Power Cord and Outlet on page 25 Position the Tape Drive on page 26 Install the SAS Host Adapter Card if required on page 26 Connect the SAS Int...

Page 32: ...rotective packaging and install it directly into an enclosure without setting it down When this is not possible place the drive s packaging on a smooth level surface and place the drive on the packagi...

Page 33: ...ser s Guide 6 68132 03 this guide SAS cables are not part of the ship group They must be ordered separately Inspect the Power Cord and Outlet 1 Inspect the power cord plug to ensure that it matches th...

Page 34: ...Off the floor In a horizontal position Where the tape cartridge can be easily inserted The unit should not be stacked Do not place anything on top of the unit Install the SAS Host Adapter Card if req...

Page 35: ...AS host adapter and for the tape drive 3 The tape drive has two SAS ports and can be connected to two servers if desired Refer to the appropriate figure that represents your configuration for cabling...

Page 36: ...lready been installed turn power to the tape drive ON Connect Power 1 If the power cord has already been installed skip to step 3 2 Plug the power cord into the rear panel see Figure 4 on page 14 then...

Page 37: ...tall Device Drivers A device driver is firmware that enables the tape drive to interact with a variety of servers See Supported device drivers on page 19 for instructions on downloading the latest dev...

Page 38: ...support To update the firmware refer to the following sections Updating Firmware through the Host Interface Use xTalk SW to update your drive firmware Refer to xTalk User Guide for more details http w...

Page 39: ...iefly displays 8 then becomes blank not lit when the firmware download and update is complete and there are no errors An error code will be displayed if a firmware download or update error has been de...

Page 40: ...Chapter 3 Installation Updating firmware 32 QuantumLTO 8 HH SAS User s Guide...

Page 41: ...ad Button Encryption status light Operating modes The drive functions in the following modes Operation mode functions include reading and writing data cartridge manipulation error reporting and firmwa...

Page 42: ...he unit is powered on but idle the Ready light see 2 in Figure 3 on page 13 is solid green when it is performing a function the Ready light is flashing green Single character Display SCD The SCD 5 in...

Page 43: ...k or a SCSI command or update the drive firmware Note If the drive dump is stored in RAM memory SCD Dot on solid the dump will be lost when you turn OFF the power or reset the drive Status Lights The...

Page 44: ...lights and Single character Display SCD and provides an explanation of what each condition means Table 3 Meaning of Status Lights and Single character Display SCD Power On Reset Initialization random...

Page 45: ...Off Off Off Off If the drive contains a cartridge during the power on cycle the drive completes POST and slowly rewinds the tape the process may take up to ten minutes The light stops blinking and be...

Page 46: ...d SCD Dot lights ON 5 SCD will go blank Ready light ON after a successful power on or reset If an error is detected during the power on or reset the tape drive posts an error code to the SCD To determ...

Page 47: ...f using an FUP cartridge The SCD will be off if using the host interface For more information see Updating firmware on page 30 Off Flashing twice per second Off Off Off The drive detected an error and...

Page 48: ...ght is flashing and 0 appears in the SCD Note While in maintenance mode the drive does not accept host interface commands Note If you attempt to enter Maintenance Mode with a cartridge in the drive th...

Page 49: ...e is in maintenance mode Ready light is flashing and Fault light is On for Maintenance mode refer to Function Code 4 Force a Drive Dump on page 52 If the drive is in operating mode Ready light is On o...

Page 50: ...he tape load compartment Note If the cartridge is already in an ejected position and you want to reinsert it remove the cartridge then insert it again If the cartridge is already loaded and you cycle...

Page 51: ...rites any pertinent information to the cartridge memory Mid tape Recovery If reset occurs while a cartridge is loaded the drive will slowly rewind the tape and eject the cartridge If a power cycle occ...

Page 52: ...th the Fault light On means to insert a cartridge not clean the drive head To clean the head insert the cleaning cartridge into the tape load compartment see Figure 3 on page 13 The drive performs the...

Page 53: ...age 45 describes each diagnostic and maintenance function that the drive can perform gives the function code which appears on the Single character Display SCD and directs you to the instructions for p...

Page 54: ...dump from flash memory Function Code 5 Copy Drive Dump on page 52 6 Run Host Interface Wrap Test Performs a check of the circuitry from and to the connector Function Code 6 Run Host Interface Wrap Te...

Page 55: ...that the drive can read from and write to tape Function Code F Write Performance Test on page 59 H Test Head Performs tests to ensure that the tape drive s head and tape carriage mechanics are workin...

Page 56: ...inserted Maintenance functions cannot be performed concurrently with read or write operations While in maintenance mode the drive does not receive host interface commands from the server Exiting Main...

Page 57: ...the test to complete Compare the recorded time with the Approximate Run Time above If the test runs successfully but the execution time is significantly longer than the Approximate Run Time run Funct...

Page 58: ...again or reboot the drive by pressing and holding the Unload button for 10 seconds Function Code 2 Update Drive Firmware from FUP Tape Caution When updating drive firmware do not power off the drive u...

Page 59: ...his function insert only a scratch blank data cartridge or a cartridge that may be overwritten During the test the drive overwrites the data on the cartridge Note If you inserted an invalid tape cartr...

Page 60: ...oad button once per second until 4 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 three o...

Page 61: ...tion 5 1 copy dump to tape clears RAM dump 5 2 copy dump to flash memory clears RAM dump 5 3 erase flash memory If you cycle past the desired code press the Unload button once per second until the cod...

Page 62: ...of the drive Connect the wrap plug to the SAS port to be tested 2 Place the drive in Maintenance Mode For instructions see Entering Maintenance Mode on page 48 3 Press the Unload button once per secon...

Page 63: ...ction Code 7 Run RS 422 Wrap Test Note This function is described here for information only It is not supported on the LTO 6 7 or 8 Tape Drives This test causes the drive to perform a check of the cir...

Page 64: ...he Unload button once per second until the code reappears 3 Press and hold the Unload button for three or more seconds then release it to select function 8 The SCD changes to a flashing C requesting a...

Page 65: ...view the most recent error code 4 Press and release the Unload button again to view successive error codes Let two to three seconds pass between each depression The Ready light and Fault light will f...

Page 66: ...d the cartridge Caution When you perform this test data on the suspect tape will be overwritten Note If you inserted an invalid tape cartridge error code J or 7 appears in the SCD If you inserted a wr...

Page 67: ...ress the Unload button to stop the diagnostic and exit maintenance mode Pressing the Unload button once will abort the test at the end of the current test loop Pressing the Unload button twice will ab...

Page 68: ...loop Total Number of Loops 10 Function Code H performs tests to ensure that the tape drive s head and tape carriage mechanics work correctly Once you begin this test the diagnostic begins the loop se...

Page 69: ...the diagnostic will loop and begin again To stop the loop press the Unload button for one second and release When the diagnostic ends 0 temporarily appears in the SCD and the tape drive exits Maintena...

Page 70: ...cartridge and exits Maintenance Mode after the cartridge is removed 1 Place the drive in Maintenance Mode For instructions see Entering Maintenance Mode on page 48 2 Press the Unload button once per s...

Page 71: ...either case the tape drive unloads the cartridge and exits Maintenance Mode after the cartridge is removed 1 Place the drive in Maintenance Mode For instructions see Entering Maintenance Mode on page...

Page 72: ...structions see Exiting Maintenance Mode on page 48 4 To disable Post Error Reporting Press and hold the Unload button for three seconds while P appears in the SCD The SCD changes to U after you releas...

Page 73: ...ting For instructions see Exiting Maintenance Mode on page 48 4 To disable Post Error Reporting Press and hold the Unload button for three seconds while P appears in the SCD The SCD changes to U after...

Page 74: ...Chapter 4 Operations Diagnostic and Maintenance Functions 66 QuantumLTO 8 HH SAS User s Guide...

Page 75: ...M Write Once Read Many Cartridge Cleaning cartridge To ensure that your Quantum Ultrium Tape Drive conforms to Quantum s specifications for reliability use only Quantum LTO Ultrium tape cartridges You...

Page 76: ...pter 5 Media 68 QuantumLTO 8 HH SAS User s Guide Figure 8 The Quantum LTO Ultrium Data Cartridge 1 LTO cartridge memory 2 Cartridge door 3 Leader Pin 4 Write protect Switch 5 Label area 6 Insertion gu...

Page 77: ...rium Tape Drives use a linear serpentine recording format The native data capacity and recording format of Ultrium data cartridges is as follows Type Color Ultrium 8 Burgundy Ultrium 8 WORM Burgundy a...

Page 78: ...tridge For more information see Write Protect Switch on page 77 Data Cartridge Native Data Capacity Recording Format Ultrium 8 12000 GB 30000 GB at 2 5 1 compression Reads and writes data on 6656 trac...

Page 79: ...y Table 6 Cartridge Compatibility Table 7 Ultrium cartridge compatibility with Ultrium tape drives Type Load Unload Cycles Ultrium 8 20 000 20k Ultrium 7 20 000 20k Ultrium 6 20 000 20k Ultrium 5 20 0...

Page 80: ...ape cartridge is loaded into the drive Note WORM format is not available for Ultrium 7 M8 format cartridges Worm Media Because standard read write media are incompatible with the WORM feature a specia...

Page 81: ...12000 GB and compressed data capacity is 30000 GB When the drive senses a WORM cartridge the firmware prohibits the changing or altering of user data already written on the tape The firmware notes th...

Page 82: ...ridge expires It is no longer usable and must be replaced Cartridge Memory Chip LTO CM All generations of the Quantum LTO Ultrium Data Cartridges include a Linear Tape Open Cartridge Memory LTO CM chi...

Page 83: ...de are M8 Quantum strongly recommends that M formatted media are labelled with M8 bar code labels Bar Code Labels A bar code label contains A volume serial number VOLSER that is human readable A bar c...

Page 84: ...ulling it at a right angle to the cartridge case Use peel clean labels that do not leave a residue after being removed If there is glue residue on the cartridge remove it by gently rubbing it with you...

Page 85: ...termines whether you can write to the tape If the switch is set to The locked position solid red data cannot be written to the tape The unlocked position black void data can be written to the tape If...

Page 86: ...ling in places where people gather Ensure that anyone who handles tape has been properly trained in handling and shipping procedures This includes operators users programmers archival services and shi...

Page 87: ...exist near high current cables or power supplies Such exposure can cause the loss of recorded data or make the blank cartridge unusable Maintain the conditions that are described in Environmental and...

Page 88: ...e Cartridge Carefully Do not drop the cartridge If the cartridge drops slide the cartridge door back and ensure that the leader pin is properly seated in the pin retaining spring clips see 2 in Figure...

Page 89: ...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 st...

Page 90: ...rtridge If a tape cartridge must be disposed of in a secure manner you can erase the data on the cartridge with a high energy ac degausser use a minimum of 4000 oersted peak field over the entire spac...

Page 91: ...AS User s Guide 83 offset 90 degrees from each other to accomplish complete erasure in one pass for higher throughput Degaussing makes the cartridge unusable If you burn the cartridge and tape ensure...

Page 92: ...Chapter 5 Media Disposing of Tape Cartridges 84 QuantumLTO 8 HH SAS User s Guide...

Page 93: ...ble for updating Firmware For optimum performance the customer must obtain the latest level of firmware for the unit by downloading the firmware from the web site http www quantum com serviceandsuppor...

Page 94: ...e case the cartridge door and the write protect switch for damage 3 Inspect the rear of the cartridge the part that you load first into the tape load compartment and ensure that there are no gaps in t...

Page 95: ...t eject properly contact your service representative Procedure 3 Checking SAS Host Connections Check the host connections for your drive by following the steps below If your server is not communicatin...

Page 96: ...ncludes Test Cartridge Media diagnostic that verifies whether a suspect cartridge and its magnetic tape are acceptable for use Statistical Analysis and Reporting System SARS to assist in isolating fai...

Page 97: ...are securely tightened 2 Verify that the drive s firmware is at the most recent level To determine the latest release of firmware visit the web See Updating firmware on page 30 for instructions on do...

Page 98: ...sure that the drive can read from and write to tape Function Code H Test Head on page 60 to ensure that the tape drive s head and tape carriage mechanics work correctly Function Code J Fast Read Write...

Page 99: ...red with a cartridge in the drive push the Unload button to eject the cartridge To clear the SCD error code and power cycle the drive press the Unload button for ten seconds A drive dump will be creat...

Page 100: ...ove any blockage that prevents air from flowing freely through the tape drive Ensure that the operating temperature and airflow is within the specified range see Specifications on page 20 Clear the er...

Page 101: ...t a drive dump from one of the following Note Do not force a new dump one already exists Server s host interface by using a device driver utility or system tool for instructions about reading a drive...

Page 102: ...defective cartridge and discard it If the operation fails and another tape drive is available insert the cartridge into the other unit and retry the operation If the operation fails discard the defect...

Page 103: ...If the diagnostic succeeds the error was temporary If another tape drive is not available insert a scratch data cartridge into the unit and run Function Code 1 Run Drive Diagnostics on page 48 If the...

Page 104: ...e Function Code 8 Unmake FUP Tape Drive will not Unmake FUP Tape Maintenance Code 8 with a cartridge that is not an FUP tape If the tape cartridge is the correct media type try another tape cartridge...

Page 105: ...uring the test The test will fail if the correct interface wrap tool is not attached 2 If the correct interface wrap tool was attached during the test replace the drive The error code clears when you...

Page 106: ...oop by pressing the Unload button once to stop the diagnostic after the completion of the first loop then record the time it takes for the test to complete Compare the recorded time with the Approxima...

Page 107: ...gher Data Cartridges only Retry the encryption operation with the tape cartridge in another encryption enabled drive Replace the media if the problem repeats with the same tape cartridge in multiple d...

Page 108: ...Appendix A Error Codes and Messages 100 QuantumLTO 7 HH SAS User s Guide...

Page 109: ...NSI that defines conditions and problems that are experienced by tape drives The technology enables a server to read TapeAlert flags from a tape drive through the host interface The server reads the f...

Page 110: ...Appendix B Tape Alert Flags 102 QuantumLTO 7 HH SAS User s Guide...

Page 111: ...compression as compared to the quantity of data that can be stored without compression In 2 5 1 compression two and a half times as much data can be stored with compression as can be stored without c...

Page 112: ...ng 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...

Page 113: ...ransmit at a given moment byte A string consisting of a certain number of bits usually 8 that are treated as a unit and represent a character A fundamental data unit C capacity The amount of data that...

Page 114: ...t connection A connection between a channel path and a drive caused when a unit check occurs during an I O operation controller A device that provides the interface between a system and one or more ta...

Page 115: ...y that can receive and send data device driver A file that contains the code needed to use an attached device DIAG Diagnostic section of maintenance information manual differential See High Voltage Di...

Page 116: ...ocode in response to a detected subsystem error FC Feature code FCC Federal communications commission FE Field engineer customer engineer or service representative field replaceable unit FRU An assemb...

Page 117: ...conversion speed matching encoding first level error recovery and interfaces to one or more tape drives FP File protect frayed Damaged as if by an abrasive substance FRU Field replaceable unit FSC Fau...

Page 118: ...re characters used to identify or name data element and possibly to indicate certain properties of that data element 3 A sequence of bits or characters that identifies a program device or system to an...

Page 119: ...high capacity The Ultrium format is the preferred format when capacity rather than fast access is the key storage consideration An Ultrium cartridge has a compressed data capacity of up to 800 GB 2 1...

Page 120: ...e millionth of microcode 1 One or more micro instructions 2 A code representing the instructions of an instruction set implemented in a part of storage that is not program addressable 3 To design writ...

Page 121: ...system The oersted is the magnetic field strength in the interior of an elongated uniformly wound solenoid that is excited with a linear current density in its winding of one abampere per 4 centimeter...

Page 122: ...ome page PROM Programmable read only memory R rack A unit that houses the components of a storage subsystem such as the library rackmount kit A packaged collection of articles used to install the rack...

Page 123: ...in which at least one of the system signals represents mechanical motion Small Computer Systems Interface SCSI A standard used by computer manufacturers for attaching peripheral devices such as tape...

Page 124: ...ating independently of or asynchronously with a controlling system sync Synchronous synchronize Occurring with a regular or predictable time relationship T tachometer tach A device that emits pulses t...

Page 125: ...d conveniently as a unit VPD Vital product data The information contained within the tape drive that requires nonvolatile storage used by functional areas of the drive and information required for man...

Page 126: ...Glossary 118 Quantum LTO 7 HH SAS User s Guide...

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