Dell PowerEdge 2300 Service Manual - Page 16

An integrated Adaptec AIC-7860 Ultra/Narrow SCSI host adapter attached

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drives, greatly simplifying drive installation. The integrated SCSI controller resides on the PCI local bus for optimum performance. An integrated Adaptec AIC-7860 Ultra/Narrow SCSI host adapter attached to the PCI bus supports up to three SCSI devices in the external drive bays through a 50-pin connector on the system board. Dell PowerEdge 2300 systems include a SCSI backplane board, which greatly simplifies cabling and configuration for SCSI hard-disk drives. SCSI ID and termination for SCSI hard-disk drives are both configured by the SCSI backplane board, rather than on individual drives. SCSI hard-disk drives are supplied by Dell in special drive carriers that fit in the internal drive bays. Three SCSI backplane board options (see Figures 1-11 through 1-13) include a non-hot-pluggable 2 x 2 backplane, non-hot-pluggable 2 x 3 backplane, and hot-pluggable 1 x 6 backplane boards. The hot-pluggable 1 x 6 backplane board supports hot-pluggable SCSI hard-disk drive installation and removal. NOTE: For maximum performance, install Ultra2/LVD drives exclusively. Although you can install a mixture of Ultra2/LVD and Ultra hard-disk drives, they will operate at the slower Ultra transfer rate. SCSI hard-disk drives must be configured as follows: Disable termination on the drive. The SCSI backplane board provides termination for the SCSI bus. Set the SCSI ID on all drives to 0. All SCSI ID numbers for the drives are set by the SCSI backplane board. Configure the drive so that the drive motor waits for a start unit command from the SCSI host adapter before spinning. 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 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 BIOS as SCSI ID 7. 1-6 Dell PowerEdge 2300 Systems Service Manual

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1-6
Dell PowerEdge 2300 Systems Service Manual
drives, greatly simplifying drive installation. The integrated SCSI controller
resides on the PCI local bus for optimum performance.
An integrated Adaptec AIC-7860 Ultra/Narrow SCSI host adapter attached to
the PCI bus supports up to three SCSI devices in the external drive bays
through a 50-pin connector on the system board.
6&6,±+DUG´’LVN±’ULYHV±
Dell PowerEdge 2300 systems include a SCSI backplane board, which greatly
simplifies cabling and configuration for SCSI hard-disk drives. SCSI ID and ter-
mination for SCSI hard-disk drives are both configured by the SCSI backplane
board, rather than on individual drives. SCSI hard-disk drives are supplied by
Dell in special drive carriers that fit in the internal drive bays.
Three SCSI backplane board options (see Figures 1-11 through 1-13) include a
non–hot-pluggable 2 x 2 backplane, non–hot-pluggable 2 x 3 backplane, and
hot-pluggable 1 x 6 backplane boards. The hot-pluggable 1 x 6 backplane board
supports hot-pluggable SCSI hard-disk drive installation and removal.
NOTE: For maximum performance, install Ultra2/LVD drives exclusively.
Although you can install a mixture of Ultra2/LVD and Ultra hard-disk drives,
they will operate at the slower Ultra transfer rate.
6&6,±&RQILJXUDWLRQ±*XLGHOLQHV±
SCSI hard-disk drives must be configured as follows:
¹
Disable termination on the drive. The SCSI backplane board provides termi-
nation for the SCSI bus.
¹
Set the SCSI ID on all drives to 0. All SCSI ID numbers for the drives are set
by the SCSI backplane board.
¹
Configure the drive so that the drive motor waits for a
start unit
command
from the SCSI host adapter before spinning.
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.
6&6,±,’±1XPEHUV
Each device attached to the Ultra/Narrow SCSI host adapter must have a
unique SCSI ID number from 0 to 7.
When SCSI devices are shipped from Dell, the default SCSI ID numbers are
assigned as follows:
¹
The on-board Ultra/Narrow SCSI host adapter is configured through the
BIOS as SCSI ID 7.