Dell PowerEdge 2200 Service Manual - Page 15

SCSI Hard-Disk Drives, SCSI Configuration Guidelines, SCSI ID Numbers - user guide

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SCSI Hard-Disk Drives A SCSI hard-disk drive cage is located below the externally accessible drive bays at the front of the computer (see Figure 1-4). The SCSI hard-drive cage can contain up to three, 1.6-inch-high SCSI hard-disk drives (either Fast/Wide or Ultra/Wide). These SCSI hard-disk drives mount vertically. The SCSI hard-disk drive bays are populated from left to right (facing the front of the computer), so that the SCSI termination jumper is accessible on the leftmost drive installed (last drive on the SCSI channel). NOTE: The externally accessible drive bays at the front of the computer are normally used for diskette drives, CD-ROM drives, and/or tape drives. Harddisk drives should be installed in the SCSI hard-disk drive cage. For detailed information about installing externally accessible drives, see Chapter 8, "Installing Drives in the External Bays," in the User's Guide. For detailed information about installing SCSI hard-disk drives, see Chapter 9, "Installing Drives in the Internal Bays," in the User's Guide. SCSI Configuration Guidelines Although SCSI devices are installed essentially the same way as other devices, their configuration requirements are different. To configure your SCSI subsystem, follow the general guidelines offered in the following subsections. SCSI ID Numbers Each device attached to the SCSI host adapter must have a unique SCSI ID number from 0 to 15. See Chapter 9, "Installing Drives in the Internal Bays," in the User's Guide for additional SCSI addressing information. NOTE: Any narrow SCSI devices installed in the externally accessible drive bays will require SCSI ID numbers less than 7. When SCSI devices are shipped from Dell, the default SCSI ID numbers are assigned as follows: • The computer's built-in SCSI controller is configured through the BIOS as SCSI ID 7 (the default ID number for a host adapter) if the system includes a CD-ROM or tape drive. NOTE: If only wide SCSI hard-disk drives are connected to the built-in SCSI controller (no CD-ROM or tape drives), the controller may be configured as SCSI ID 15. • A SCSI CD-ROM drive (installed in an externally accessible drive bay) is configured as SCSI ID 5. • A SCSI tape drive (if installed) is configured as SCSI ID 6. System Overview 1-7

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System Overview
1-7
SCSI Hard-Disk Drives
A SCSI hard-disk drive cage is located below the externally accessible drive
bays at the front of the computer (see Figure 1-4). The SCSI hard-drive cage
can contain up to three, 1.6-inch-high SCSI hard-disk drives (either Fast/Wide
or Ultra/Wide). These SCSI hard-disk drives mount vertically. The SCSI
hard-disk drive bays are populated from left to right (facing the front of the
computer), so that the SCSI termination jumper is accessible on the leftmost
drive installed (last drive on the SCSI channel).
NOTE: The externally accessible drive bays at the front of the computer are
normally used for diskette drives, CD-ROM drives, and/or tape drives. Hard-
disk drives should be installed in the SCSI hard-disk drive cage. For detailed
information about installing externally accessible drives, see Chapter 8, “Installing
Drives in the External Bays,” in the
User’s Guide
. For detailed information about
installing SCSI hard-disk drives, see Chapter 9, “Installing Drives in the Internal
Bays,” in the
User’s Guide
.
SCSI Configuration Guidelines
Although SCSI devices are installed essentially the same way as other devices,
their configuration requirements are different. To configure your SCSI sub-
system, follow the general guidelines offered in the following subsections.
SCSI ID Numbers
Each device attached to the SCSI host adapter must have a unique SCSI ID
number from 0 to 15. See Chapter 9, “Installing Drives in the Internal Bays,” in
the
User’s Guide
for additional SCSI addressing information.
NOTE: Any narrow SCSI devices installed in the externally accessible drive
bays will require SCSI ID numbers less than 7.
When SCSI devices are shipped from Dell, the default SCSI ID numbers are
assigned as follows:
•
The computer’s built-in SCSI controller is configured through the BIOS as
SCSI ID 7 (the default ID number for a host adapter) if the system includes
a CD-ROM or tape drive.
NOTE: If only wide SCSI hard-disk drives are connected to the built-in SCSI
controller (no CD-ROM or tape drives), the controller may be configured as
SCSI ID 15.
•
A SCSI CD-ROM drive (installed in an externally accessible drive bay) is
configured as SCSI ID 5.
•
A SCSI tape drive (if installed) is configured as SCSI ID 6.