HP NetRAID Installation and Configuration Guide

Chapter 4 Planning
33
Channels
In this section you determine which physical devices will connect to each SCSI
channel of the adapter. Record the SCSI ID number and physical capacity of each
disk drive in the correct channel on Worksheet A. No two devices on a single
channel can have the same SCSI ID. SCSI ID 7 is reserved for the HP NetRAID
Series adapter. For some HP NetServers and optional mass storage enclosures,
another SCSI ID is reserved for the processor managing the mass storage cage or
enclosure. Physical drives on different channels can be assigned to the same
array.
HP NetRAID Series adapters support all HP hot-swap SCSI devices and certain
non-hot-swap SCSI devices, such as the Wide hard disk drives installed in the
HP NetServer E 45, E 50, or E 60 and the HP NetServer LC II or LC 3.
As explained in Chapter 1, "Introduction," for each channel, you have either one
internal or one external connection. HP NetRAID Series adapters support the
following channels and connectors:
• The HP NetRAID-3Si adapter provides internal and external connectors
for Channels 0, 1, and 2.
• The HP NetRAID-1Si adapter provides an internal and external connector
for Channel 0.
SCSI Transfer Rate
On Worksheet A, record the SCSI transfer rate for each channel. The default
SCSI transfer rate is Fast, but you can change this rate to Ultra or Ultra2 for the
channels that use it.
HP NetRAID-3Si and HP NetRAID-1Si adapters support Ultra2 drives. Refer to
your system or external disk enclosure documentation to determine whether your
disk enclosure supports Ultra or Ultra2 SCSI drives.
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