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Compaq ProLiant 1850R Servers Maintenance and Service Guide
Mass Storage Devices
Compaq ProLiant 1850R Servers can house up to 7 mass storage devices, including:
■ Preinstalled 3.5-inch, 1.44-MB diskette drive
■ Two available Half-Height 5.25-inch drive bays (removable media area)
■ Preinstalled 24X Max low-profile CD-ROM drive
■ Up to three 1-inch height or two 1.6-inch height Compaq hot-plug hard drives

Drive Installation Guidelines

When adding SCSI hard drives to the ProLiant 1850R Servers, observe the following
guidelines:
■ A maximum of seven SCSI devices per controller may be added.
■ Each SCSI drive must have a unique address.
■ SCSI addresses (IDs) are automatically determined for drives installed in the hot-plug
drive cage of the ProLiant 1850R. See Table 2-1.
■ Compaq non-hot-plug drive SCSI cables for the ProLiant 1850R servers are terminated.
Remove all terminating jumpers from third-party SCSI devices.
■ The hot-plug SCSI backplane board provides proper termination for SCSI devices
installed in hot-plug bays.
■ Supported Compaq SCSI options are not terminated.
The following chart provides the SCSI ID jumper settings for Compaq SCSI hard drives.

Table 2-1

SCSI ID Settings

SCSI ID Bit 2 Bit 1 Bit 0
6ON ON OFF
5 ON OFF * ON
4 ON O FF* OFF *
3 OFF * ON ON
2 OFF * ON OFF *
1 OFF * OFF * ON
0 OFF * OFF * OFF *
* NOTE: OFF = jumper removed