Dell PowerEdge 2300 Installation and Troubleshooting Guide - Page 129

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NOTE: Unused power cables may be held in a retention clip just underneath the computer's top cover. The power cable connectors may be covered with protective plastic caps. SCSI devices in the external drive bays are controlled by the Ultra/Narrow SCSI controller on the system board. Although SCSI devices are installed essentially the same way as other devices, their configuration requirements are different. To configure SCSI devices installed in the external bays, follow the guidelines in the following subsections. Each device attached to the Ultra/Narrow SCSI host adapter must have a unique SCSI identification (ID) number from 0 to 7. When SCSI devices are shipped from Dell, the default SCSI ID numbers are assigned as follows: The on-board Ultra/Narrow SCSI host adapter is configured through the basic input/output system (BIOS) as SCSI ID 7. A SCSI tape drive is configured as SCSI ID 6 (the default ID number for a tape drive). A SCSI CD-ROM drive is usually configured as SCSI ID 5. NOTE: There is no requirement that SCSI ID numbers be assigned sequentially or that devices be attached to the cable in order by ID number. SCSI logic requires that the two devices at opposite ends of the SCSI chain be terminated and that all devices in between be unterminated. Before installing SCSI devices in the computer, you must configure the termination on the SCSI device(s) to conform to the following guidelines: A single SCSI device (such as the standard CD-ROM drive) must be terminated. If two or more SCSI devices are installed, connect the devices as follows: - Attach one of the devices to the end connector on the SCSI cable, and leave the termination enabled on that device. - Connect the other end of the SCSI cable to the computer's on-board Ultra/ Narrow SCSI host adapter or to an optional SCSI host adapter card. - Disable the termination on all other devices you attach to the cable. Installing Drives in the External Bays 9-5

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Installing Drives in the External Bays
9-5
NOTE: Unused power cables may be held in a retention clip just underneath the com-
puter’s top cover. The power cable connectors may be covered with protective plastic
caps.
,QVWDOOLQJ±6&6,±’HYLFHV±LQ±WKH±([WHUQDO±%D\V
SCSI devices in the external drive bays are controlled by the Ultra/Narrow SCSI con-
troller on the system board.
6&6,±&RQILJXUDWLRQ±,QIRUPDWLRQ
Although SCSI devices are installed essentially the same way as other devices, their
configuration requirements are different. To configure SCSI devices installed in the
external bays, follow the guidelines in the following subsections.
6&6,±,’±1XPEHUV
Each device attached to the Ultra/Narrow SCSI host adapter must have a unique SCSI
identification (ID) number from 0 to 7.
When SCSI devices are shipped from Dell, the default SCSI ID numbers are assigned
as follows:
²
The on-board Ultra/Narrow SCSI host adapter is configured through the basic
input/output system (BIOS) as SCSI ID 7.
²
A SCSI tape drive is configured as SCSI ID 6 (the default ID number for a tape
drive).
²
A SCSI CD-ROM drive is usually configured as SCSI ID 5.
NOTE: There is
no
requirement that SCSI ID numbers be assigned sequentially or that
devices be attached to the cable in order by ID number.
’HYLFH±7HUPLQDWLRQ
SCSI logic requires that the two devices at opposite ends of the SCSI chain be termi-
nated and that all devices in between be unterminated.
Before installing SCSI devices in the computer, you must configure the termination on
the SCSI device(s) to conform to the following guidelines:
²
A single SCSI device (such as the standard CD-ROM drive) must be terminated.
²
If two or more SCSI devices are installed, connect the devices as follows:
—
Attach one of the devices to the end connector on the SCSI cable, and leave
the termination enabled on that device.
—
Connect the other end of the SCSI cable to the computer’s on-board Ultra/
Narrow SCSI host adapter or to an optional SCSI host adapter card.
—
Disable the termination on all other devices you attach to the cable.