Step 4. Determining the SCSI Address
The 7207-122 Tape Drive can only be set to SCSI addresses 0-7. (Addresses 8
and 9 are selectable options, but should not be used in normal operation or errors
will result; address 8 is invalid and address 9 starts the drive self test described in
the preceding step.)
Before you install the 7207-122 Tape Drive, you must find a SCSI address that is
not an address being used by another device. To find an unused SCSI address,
you must:
Identify the name and the port of the RS/6000 SCSI I/O controller that you want
to attach to
Identify the SCSI address of that SCSI I/O controller
Identify the SCSI addresses of other devices connected to that SCSI I/O
controller
Note: If you attach to a wide bus, SCSI addresses 0-15 are available but only 0-7
can be used as an address for this tape unit. Even though the 7207-122
Tape Drive uses only the range of addresses for a narrow bus, it is
designed to not impact the function of the other devices on the wide bus;
they still negotiate a wide attachment and run at appropriate data rates.
1. To identify the name and the port of an RS/6000 SCSI I/O controller that
you want to attach to, at the system prompt type
lsdev -C | grep scsi
and
press Enter. A list of controllers display in the following format. The names
appear in the first column (for example,
scsið
and
scsi2
). The ports appear
in the third column and in the fourth position (highlighted as follows):
Note: Column headings are for reference only; they do not appear on the
screen.
Column 1
Column 2
Column 3
Column 4
scsið
Available ðð-ð
ð
-ðS
Standard SCSI I/O Controller
scsi2
Available ðð-ð
2
SCSI I/O Controller
Note the name and port of the SCSI I/O controller that you want to attach to
(for example, the
scsi2
controller on port
2
).
2. To determine the SCSI address of the SCSI I/O controller that you noted in
the previous step, type
lsattr -El scsix | grep id
(where
x equals the
last character in the name of the SCSI I/O controller) and press Enter. The
address of the SCSI I/O controller displays in the following format:
id
7
Adapter card SCSI I
True
Note the address of the SCSI I/O controller (in this case,
7
).
Chapter 2. Setting Up
5
Summary of Contents for System Storage 7207
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