Sun Microsystems StorEdge S1 AC100, Installation And Maintenance Manual

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Chapter 3 Installing the StorEdge S1 Enclosure 39
Setting the SCSI IDs
To Determine the Available SCSI IDs
Refer to the Solaris Handbook for Sun Peripherals in the Solaris AnswerBook2 online
documentation for information on how to determine which SCSI target IDs are
available for your system.
1. Determine which SCSI IDs are not available to assign to StorEdge S1 drives.
■
Which SCSI IDs are being used by the host system?
Some host systems have dedicated SCSI devices on the system bus. For example,
the Netra t1 Model 100/105 system reserves SCSI ID 7 for the SCSI controller and
SCSI ID 0 and 1 for internal disks. When selecting a base SCSI ID for the StorEdge
S1 storage enclosure, avoid these three reserved IDs. The Netra T1 AC200 and
DC200 server has no such restrictions.
■
Is there already an external SCSI device connected to the SCSI bus?
For example, is there an existing Netra st D130 storage enclosure or an external
tape drive? If so, the Netra st D130 enclosures are assigned one or both of the
following SCSI ID sequences:
■
SCSI ID base address 2 for drive IDs 2, 3, and 4
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SCSI ID base address 10 (A) for drive IDs 10 (A), 11 (B), and 12 (C)
See the Netra st D130 documentation for further information on setting SCSI ID
addresses for the Netra st D130 storage enclosure.
■
The default SCSI controller ID is SCSI ID 7. This ID cannot be assigned to a
StorEdge S1 drive unless the controller ID has been modified from the default.
2. Determine which SCSI IDs you can assign to the StorEdge S1 units that you have
to install.
All three drive bays of the StorEdge S1 unit have to be assigned to a SCSI ID
number, whether or not a disk drive occupies the bay. SCSI IDs must be assigned to
the StorEdge S1 unit in groups of three (see
FIGURE 3-13
). Each of the SCSI IDs in the
series must be unassigned to the host system or other peripheral.