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Step 6: Attach power and SCSI cables
1 Attach a spare power cable from the server's internal power supply to the power connector,
as shown in Figure 7, item 1.
2 Attach a spare connector on the server or HBA’s SCSI ribbon cable to the SCSI connector of
the drive, as shown in Figure 7, item 2.
3 If the drive is the last device on the SCSI chain, make sure that the SCSI cable is terminated
correctly
Do not daisy-chain Ultrium 960 tape drives. Up to two Ultrium 460 tape drives may be daisy-
chained, but is not recommended. If you do so, install your tape drives on an Ultra 320 SCSI
bus. Similarly, up to two Ultrium 230 drives may be installed on an Ultra 160 SCSI bus.
Do
not mix drive families.
Note If you attach your drive to a higher-rated SCSI bus, the internal SCSI cable should be of the
same specification as the SCSI HBA. For example, if you connect an Ultrium 460 to an Ultra
320 bus, make sure that the internal cable supports Ultra 320.
Where should 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 default on the HBA and most internal SCSI cables have a terminator attached. This will
usually be a small, rectangular block of plastic attached to the cable end and marked ‘SCSI
Terminator’.
Therefore, assuming the HBA is the first device on the bus, you should check that the second
terminator is placed after the last device, as shown in Figure 7, item 2.
ult960_master_internal.fm Page 19 Tuesday, September 21, 2004 4:13 PM