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use the external LVD SCSI channel connector (J14) to connect external SCSI
devices to the server, you must remove the knockout on the rear of the server and
install an optional external SCSI cable.
Note: If you install a PCI RAID adapter to configure and manage the internal
hot-swap drives, you must move the SCSI cable from the system-board
SCSI connector to an internal channel connector on the RAID adapter. See
"Cabling a RAID or SCSI adapter" on page 56 for additional information.
Setting SCSI IDs
Each SCSI device that is connected to a SCSI controller must have a unique SCSI
ID. This ID enables the SCSI controller to identify the device and ensure that
different devices on the same SCSI channel do not attempt to transfer data
simultaneously. SCSI devices that are connected to different SCSI channels can
have duplicate SCSI IDs. SCSI IDs 6 and 7 are reserved for SCSI controllers. The
default ID for the SCSI controller is 7. The hot-swap-drive backplane controls the
SCSI IDs for the internal hot-swap drive bays. See "Working with the optional
xSeries 6-Pack Hot-Swap Hard Drive Expansion Kit" on page 61 for instructions for
installing the 6-Pack option, and "Installing internal drives" on page 71 for
instructions for installing hard disk drives.
Table 12 lists the SCSI IDs for the standard backplane and the hard disk drives in
bays 1 through 6; these devices are connected to the same SCSI channel. In the
typical server configuration, the standard backplane and the hard disk drives in
bays 1 through 6 are connected to channel B (internal SCSI connector J15 on the
system board). Table 13 lists the SCSI IDs for the optional backplane and the hard
disk drives in bays 7 through 12; these devices are connected to the same SCSI
channel. The optional backplane and the hard disk drives in bays 7 through 12 are
connected to a channel on a RAID adapter (see "Cabling a RAID or SCSI adapter"
on page 56). Note that in Table 12 and Table 13, the hot-swap hard disk drive bay
numbers are from left to right.
Table 12. SCSI IDs for standard backplane, SCSI controller, and hot-swap drives in bays 1
through 6
Device
Drive bay 1
Drive bay 2
Drive bay 3
Drive bay 4
Drive bay 5
Drive bay 6
SCSI controller
Backplane
Table 13. SCSI IDs for optional backplane, SCSI controller, and hot-swap drives in bays 7
through 12
Device
SCSI controller
Backplane
Drive bay 7
Drive bay 8
SCSI ID
0
1
2
3
4
5
6 or 7 (default)
8
SCSI ID
6 or 7 (default)
9
10
11
Chapter 4. Customer replaceable units
111
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