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Figure 8-2 SCSI termination in external drives

If you have more than one device on the SCSI bus, daisy-chain them by
connecting a cable from the SCSI-OUT connector on the first device to the
SCSI-IN connector on the second device and make sure that the second
device is terminated. (Always use an LVD-rated cable and an LVD-rated or
multimode terminator.)

Figure 8-3 SCSI termination in daisy-chained external drives

SCSI cables

Cables matter in SCSI systems. There are two factors to consider: cable
length and cable quality.

Cable length

•

For single-ended SCSI with Fast devices there is a maximum permissible
length of 6 meters for a single SCSI bus.

1018931

DAT SCSI Tape Drives

54

Chapter 8–SCSI configuration guide

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Summary of Contents for DAT 160

Page 1: ......

Page 2: ...tents of this document and specifically disclaims any implied warranties of merchantability or fitness for any particular purpose Further Tandberg Data Corporation reserves the right to revise this pu...

Page 3: ...nal tape drive 14 Power requirements 15 Drivers 15 Backup software 15 2 Installing an internal DAT tape drive 17 Check the drive s SCSI ID 17 Prepare mounting bay 18 Attach mounting hardware 19 Instal...

Page 4: ...Getting the most out of cartridges and drives 42 7 Troubleshooting 45 General Procedure 45 Problems with cartridges 46 The cartridge is jammed 47 The drive will not accept the cartridge or ejects it i...

Page 5: ...ive example 2 no mounting hardware used 23 Figure 2 6 Setting the SCSI ID 26 Figure 3 1 Connecting the SCSI cable 27 Figure 3 2 Connecting the power cable 28 Figure 3 3 Front panel DAT 160 tape drive...

Page 6: ...SCSI termination in daisy chained external drives 54 Figure 8 3 1018931 DAT SCSI Tape Drives 6...

Page 7: ...CSI bus types 14 Table 1 1 Power requirements 15 Table 1 2 LED sequences for DAT 160 33 Table 5 1 LED sequences for DAT 160 continued 34 Table 5 2 Data cartridge compatibility 40 Table 6 1 Cleaning ca...

Page 8: ...1018931 DAT SCSI Tape Drives 8 Notes...

Page 9: ...ldwide technical support information please visit the support pages at http www tandbergdata com Before contacting support collect the following information Product model names and numbers Technical s...

Page 10: ...ue text Table 1 on page X website addresses Blue underlined text http www tandbergdata com Bold text Keys that are pressed Text typed into a GUI element such as a box GUI elements that are clicked or...

Page 11: ...mounting requirements for an internal tape drive on page 14 Drivers on page 15 Backup software on page 15 DAT tape drive models This guide describes how to install and operate the following Tandberg...

Page 12: ...LED 3 Drive LED Figure 1 1 Front view of DAT 160 tape drive 1 3 2 3 Eject button 1 Clean LED 2 Tape LED Figure 1 2 Front view of DAT 72 tape drive Which operating systems are supported 1018931 DAT SC...

Page 13: ...ler on your server and a suitably rated SCSI cable Please visit the support pages at http www tandbergdata com to ensure that you are connecting Note to a supported HBA running the recommended firmwar...

Page 14: ...ltra160 LVD Ul tra320 LVD Yes These are supported but performance may be impaired Ultra2 LVD Ultra Wide LVD Yes But this is not a recommended configuration as it will restrict performance Ultra wide s...

Page 15: ...ckage On Linux and UNIX operating systems drivers are included with the operating system and should be loaded automatically To upgrade drivers we recommend that you patch to the latest version of the...

Page 16: ...plication is compatible with DAT tape drives but the user must always choose 4 mm tape even Note when using 8 mm tape with a Tandberg Data DAT 160 tape drive 1018931 DAT SCSI Tape Drives 16 Chapter 1...

Page 17: ...ault SCSI ID of 3 Each device on the SCSI bus must have an unique SCSI ID number The drive can be assigned any unused ID between 0 and 15 Do not use SCSI ID 7 which is reserved for the SCSI controller...

Page 18: ...jumper It should always be set Spare jumpers will be attached to the drive The drive is supplied with compression enabled It can be disabled by removing the compression jumper but this is not generall...

Page 19: ...their position and connections so you can put them back correctly later 4 Remove the filler panel from a spare 5 inch bay of your server as described in your server s documentation With some servers...

Page 20: ...ststrap if one is Caution available If not after you have disconnected power from the server and removed the cover touch a bare metal part of the chassis Similarly touch a bare metal part of the drive...

Page 21: ...e of the tape drive it is important that you connect to a recommended SCSI bus and use a suitably rated SCSI cable see Why is the SCSI bus type important on page 14 1 Check your server or HBA document...

Page 22: ...ld the SCSI terminator be Termination must be present at two and ONLY two positions on the SCSI bus at the beginning of the SCSI bus and at the end of the SCSI bus Termination is normally enabled by d...

Page 23: ...drive as described in your server documentation Ensure blanking plates are in place over empty bays and replace the cover on the server 1 plastic rail 2 server latch push down to lock the tape drive i...

Page 24: ...1018931 DAT SCSI Tape Drives 24 Chapter 2 Installing an internal DAT tape drive Notes...

Page 25: ...the range 100 240 volts 0 7 A 50 60 Hz No adjustment is needed A power cord and a SCSI cable are provided with your DAT tape drive Check the drive s SCSI ID Your DAT drive is shipped with a default S...

Page 26: ...installation power down both the computer and the tape drive change the drive s SCSI ID power up the tape drive and then power up the computer Note Connect the SCSI cable A wide VHD to HD SCSI cable...

Page 27: ...rear panel of the tape drive and secure it by tightening the screws 5 Connect the LVD terminator to the drive s other SCSI connector and tighten the screws to secure it Why does the tape drive need a...

Page 28: ...any voltage in the range 100 240 volts 0 7 A 50 60 Hz No adjustment is needed To connect your drive to the power supply proceed as follows 1 Make sure that the drive is switched OFF O side down The po...

Page 29: ...ile the Ready and Clean or Use Cleaning Cartridge LEDs are off This continues until the drive is reset DAT 72 drives If self test passes both front panel lights should be off If a hard error causes th...

Page 30: ...plication Check http www tandbergdata com for software compatibility and install any recommended upgrades 6 Carry out a backup and restore test to check that the drive can write data to tape Use a bla...

Page 31: ...5 Operating your tape drive In this chapter Front panel on page 32 LED sequences on page 32 Loading and unloading cartridges on page 36 Removing power from the drive on page 37 31 August 2009...

Page 32: ...eject button 3 clean LED 4 tape LED Figure 5 1 Front panel DAT 160 tape drive 4 tape LED 1 cartridge door 5 power LED external drives only 2 eject button 3 clean LED Figure 5 2 Front panel DAT 72 tape...

Page 33: ...vice Drive may not have power may be faulty or may have been power cycled or reset during a firmware upgrade All LEDs OFF None This is normal The drive is ready for operation Ready is ON None If the d...

Page 34: ...vice The drive believes the current tape or the tape just ejected is faulty Tape FLASHES Load a new cartridge If the error persists power cycle or reset the drive If the Drive LED remains on call for...

Page 35: ...gnal flashing slowly off or flashing 1 Wait for the current operation to finish then insert a different tape and repeat the operation that was being performed 2 If the media caution signal does not sh...

Page 36: ...more information about tape drive and cartridge compatibility Note 1 cartridge slot 2 arrow indicates leading direc tion Figure 5 3 Inserting a data cartridge into a DAT 160 external drive 2 DAT 160...

Page 37: ...ompletes any task it is currently performing winds the tape to the beginning and ejects the cartridge The sequence will take about 25 seconds for a write enabled cartridge and 10 seconds for a write p...

Page 38: ...1018931 DAT SCSI Tape Drives 38 Chapter 5 Operating your tape drive Notes...

Page 39: ...es DAT 160 cartridges can only be used with DAT 160 tape drives they are wider than earlier formats and will not fit into earlier tape drive models DAT 160 cartridges provide optimum performance and m...

Page 40: ...GB read write read write not sup ported not sup ported DAT 160 not suppor ted 72 GB read write read write not sup ported DAT 72 Capacity assumes 2 1 compression Write protecting cartridges If you want...

Page 41: ...rd DDS cleaning cartridge All other DAT tape drives Do not use swabs or other means of cleaning the heads The cleaning cartridge uses a special tape to clean the tape heads A cleaning cartridge can on...

Page 42: ...nsformers Do not drop cartridges or handle them roughly Do not stick more than one label onto the cartridge label area extra labels can cause the cartridges to jam in the drive Stick labels onto the l...

Page 43: ...trolled environment You need to make sure there are no other cartridges with sensitive information on them anywhere near the bulk eraser when in use All data will be lost on cartridges that are bulk e...

Page 44: ...1018931 DAT SCSI Tape Drives 44 Chapter 6 Use the correct media Notes...

Page 45: ...ter of this guide 2 Check the power connectors 3 Is the SCSI ID correctly set Is there a SCSI system conflict Has the SCSI bus been correctly terminated See also SCSI configuration guide on page 49 4...

Page 46: ...oblem probably lies with the drive or the host computer Has the drive been moved recently Have any cables been disconnected and reconnected Has the environment changed unusually hot cold damp or dry H...

Page 47: ...om the time of the first press to give the normal eject procedure a chance to proceed After this period it immediately releases the tape and ejects the cartridge regardless of what operation it was pe...

Page 48: ...your media and discard it if it is damaged 5 Use a new or known good piece of media and see if it loads If it does the original cartridge is faulty and should be discarded 6 Check if another DAT drive...

Page 49: ...to a SCSI bus of a similar or higher specification This means that you need An Ultra160 or Ultra320 SCSI host bus adapter Ultra2 SCSI is also supported but performance may be degraded if there are se...

Page 50: ...ters such as the LSI Logic LSI22320 R have more than one SCSI bus available on a single card Various terms are used when describing SCSI devices These terms relate to the factors that affect performan...

Page 51: ...s you will need to know their IDs to avoid any conflict with the new tape drive Here are some methods of finding out the information Most computers display a list of SCSI devices and IDs during the bo...

Page 52: ...cal ends of the bus and only at the ends There are two main types of termination active and passive Active terminators reduce interference and allow faster data throughput On devices with high transfe...

Page 53: ...to the same SCSI bus the HBA will be in the middle of the cable Note and thus its termination must be disabled See the host bus adapter s documentation for details of how to do this External drives Al...

Page 54: ...ond device is terminated Always use an LVD rated cable and an LVD rated or multimode terminator Figure 8 3 SCSI termination in daisy chained external drives SCSI cables Cables matter in SCSI systems T...

Page 55: ...ar take care when connecting or disconnecting not to damage the high density connectors Avoid putting excessive twists in external shielded cables as this can cause premature failure With internal dev...

Page 56: ...between the wire pairs determines the signal value This enables faster data rates and longer cabling with less susceptibility to noise than SE signaling and reduced power con sumption If you use LVD S...

Page 57: ...es 39 DAT tape drive front view 11 32 LEDs 33 loading 36 models supported 11 powering off 37 unloading 37 default SCSI ID 17 25 document conventions IX drive operating 32 drivers installing 15 unix 16...

Page 58: ...ification See S SCSI ID default 17 25 software troubleshooting 46 supported operating systems 12 symbols in text X T technical support IX text symbols X troubleshooting cartridge ejected 47 cartridges...

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