IBM 86807RY Hardware Maintenance Manual - Page 145

SCSI Drives, SCSI IDs

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The Netfinity 7000 M10 supports one diskette drive only. Your server supports four slim-high (1-inch) or two half-high (1.6-inch), 3.5-inch hot-swap hard disk drives in the hot-swap bays. The hot-swap bays connect to a SCSI backplane. This backplane is the printed circuit board behind the bay. The backplane supports up to four hard disk drives. The diskette drive uses 1 MB and 2 MB diskettes. For optimum use, format 1 MB diskettes to 720 KB and format 2 MB diskettes to 1.44 MB. SCSI Drives: Some drives have a special design called small computer system interface, or SCSI. This design allows you to attach multiple drives to a single SCSI connector. Notes 1. Any information about SCSI drives also applies to other SCSI devices, such as tape drives. 2. If you plan to install both internal and external SCSI devices, you must follow the instructions in "Connecting External Options" on page 100, in addition to the instructions in this section. A 16-bit (wide) SCSI cable connects the hot-swap backplane to one channel of the integrated SCSI controller on the I/O function card. SCSI IDs: Each SCSI device that is connected to an individual integrated SCSI controller needs a unique identification (ID) so that the controller can identify the devices and ensure that different devices do not attempt to transfer data at the same time. (The integrated SCSI controllers operate independently.) If you need to set IDs for SCSI devices, refer to the instructions that come with those devices. Your server automatically sets SCSI IDs for hot-swap hard disk drives, according to the jumper settings on the SCSI backplane. The server uses the hard disk drive SCSI IDs to send status information to the indicator lights above each hot-swap bay. Note Do not set the SCSI ID jumpers on hard disk drives. The SCSI backplane in the server supports up to four hot-swap drives. Table 9 on page 138 shows the default SCSI IDs that the backplane assigns for hot-swap hard disk drives. Netfinity 7000-M10 - Type 8680 137

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±
The Netfinity 7000 M10 supports one diskette drive
only.
±
Your server supports four slim-high (1-inch) or two
half-high (1.6-inch), 3.5-inch hot-swap hard disk
drives in the hot-swap bays.
±
The hot-swap bays connect to a SCSI
backplane
.
This backplane is the printed circuit board behind the
bay.
The backplane supports up to four hard disk
drives.
±
The diskette drive uses 1
MB and 2
MB diskettes.
For optimum use, format 1
MB diskettes to 720
KB
and format 2
MB diskettes to 1.44
MB.
SCSI Drives:
Some drives have a special design
called
small computer system interface
, or SCSI.
This
design allows you to attach multiple drives to a single
SCSI connector.
Notes
1.
Any information about SCSI drives also applies to
other SCSI devices, such as tape drives.
2.
If you plan to install both internal and external
SCSI devices, you must follow the instructions in
“Connecting External Options” on page
100, in
addition to the instructions in this section.
A 16-bit (wide) SCSI cable connects the hot-swap
backplane to one channel of the integrated SCSI controller
on the I/O function card.
SCSI IDs:
Each SCSI device that is connected to an
individual integrated SCSI controller needs a unique
identification (ID) so that the controller can identify the
devices and ensure that different devices do not attempt to
transfer data at the same time.
(The integrated SCSI
controllers operate independently.)
If you need to set IDs
for SCSI devices, refer to the instructions that come with
those devices.
Your server automatically sets SCSI IDs for hot-swap hard
disk drives, according to the jumper settings on the SCSI
backplane.
The server uses the hard disk drive SCSI IDs
to send status information to the indicator lights above
each hot-swap bay.
Note
Do not set the SCSI ID jumpers on hard disk drives.
The SCSI backplane in the server supports up to four
hot-swap drives.
Table
9 on page
138 shows the default
SCSI IDs that the backplane assigns for hot-swap hard
disk drives.
Netfinity 7000-M10 - Type 8680
137