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Step 1: Check the SCSI connection
Use the following questions to help you check your SCSI connection. If you answer 'Yes' to all
these questions, you are ready to install your tape drive. If you answer 'No', you will probably
need to purchase and install additional items.
Are you connecting to a SCSI
1
bus on a server?
Is there a spare SCSI port on
2
the server?
Is the spare port on an Ultra 3
3
(160) or Ultra 4 (320) SCSI
bus?
Will the drive be the only
4
device on the bus? This is the
recommended configuration.
Do not connect to a RAID
controller channel. This is for
disk drives only.
Does the HBA/controller have
5
a VHD SCSI connector?
SCSI Bus Type
Ultra 3 (160) LVD
Ultra 4 (320) LVD
Ultra 2 LVD
Single-ended, wide
High Voltage
Differential
table 1: supported SCSI bus types
No?
Yes?
No?
Yes?
No?
Yes?
No?
Yes?
No?
Transfer Speed
Up to 160 MB/s
Up to 320 MB/s
Up to 80 MB/s
Up to 40 MB/s
Up to 40 MB/s
For fibre channel connections, you need a
fibre channel/SCSI bridge of the correct
specification. Contact your fibre channel
infrastructure vendor for details.
Purchase and install one of the recommended
HBAs into an unused 64-bit PCI expansion
slot. (The HBA can also be installed in a 32-
bit PCI expansion slot, but performance may
be degraded.)
Performance may be impaired. See table
below. Consider replacing your card with
one of the recommended HBAs.
If you have a spare PCI slot, install a new
Ultra 160 HBA to provide a dedicated SCSI
bus. If you have to configure more than one
drive on the same bus, install an Ultra 4
(320) HBA and make sure the last device on
the bus is terminated.
Purchase and install a VHD-to-HD adapter
or use an HD-to-HD cable instead of the
supplied VHD-to-HD cable.
Supported
Yes. This is the recommended configuration.
Yes. This is the recommended configuration for more
than one drive per bus.
Yes, but this will not provide optimum performance.
Yes, but this is not recommended as it will severely
restrict performance.
Do not connect to a narrow SCSI bus.
No. The drive will not work and you may damage
the drive or controller
9
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