Tandberg Data Magnum 224, Руководство по эксплуатации продукта, Страница: 36 / 278

18
P
RODUCT
M
ANUAL
1017472
C
HAPTER
2—I
NSTALLING THE
L
IBRARY
G
UIDELINES FOR
C
ONNECTING TO
SCSI
Keep these guidelines in mind as you plan your SCSI connections:
Do not connect to an inadequate host bus adapter.
Do not connect single-ended SCSI devices. Although single-ended SCSI is
compatible with the tape drive’s LVD SCSI interface, Tandberg Data does
not support connecting single-ended devices to the SCSI bus attached to the
tape drives.
Do not connect the tape drives to a RAID controller. The library will not
operate if the tape drives are connected to a RAID controller.
Do not exceed SCSI bus length restrictions.
The maximum allowable length
of an LVD SCSI bus is 12 meters (39 feet) if you have more than two devices
on the bus. Make sure the SCSI bus attached to the tape drive (or tape drives)
does not exceed this length.
a. a. a. a. Add together the lengths of all external SCSI cables on the bus.
b. b. b. b. Add 20.3 centimeters (8.0 inches) for the internal cable length used by
each installed tape drive. If you daisy-chain the tape drives, add the length
of the cable between the drives.
c. c. c. c. Add the internal cable lengths for any other SCSI devices on the bus.
Make sure the SCSI bus is properly terminated. You must install a
terminator on the device at the physical end of the SCSI bus. If one of the
tape drives in the library terminates the SCSI bus, you must install the
required terminator on one of the tape drive’s SCSI connectors.
If there are additional devices on the SCSI bus, ensure that only the device
at the physical end of the bus is terminated.
M
AKING THE
SCSI C
ONNECTIONS
1. 1. 1. 1. Power off the library (press the 0 on the back of the unit).
! ! ! !
Important
LTO-2, LTO-3, and LTO-4 SCSI tape drives are Ultra 160 SCSI
devices and require a minimum Ultra 160 non-RAID SCSI host
bus adapter card.
!
! !
!
Important
LTO-2, LTO-3, and LTO-4 SCSI tape drives require an Ultra 3
or LVD 160 terminator to function properly on the SCSI bus.
An inadequate terminator will result in various SCSI bus issues,
including bus hangs and Read/Write failures. See
“Tape Drive
Fails with Sporadic Errors” on page 197 .