User guide

4-4 Compaq Smart Array 431 Controller User Guide
SCSI Termination
All SCSI buses require termination on both ends of the bus to prevent signal
degradation. The Smart Array 431 Controller supplies the termination on the
origination end of the SCSI bus. Termination for the opposite end of the bus is
either provided by the internal SCSI cable or by the backplane. Therefore,
individual SCSI drives in Compaq servers should not contain bus termination.
External SCSI devices must also provide termination for the SCSI bus. This is
supplied in Compaq ProLiant Storage systems. Therefore, individual SCSI
drives in Compaq ProLiant Storage systems should not contain bus
termination.
SCSI IDs
The Smart Array 431 contains one SCSI bus (port), which supports up to 15
drives. Peripherals attached to either connector must have a unique SCSI ID in
the range of 0 to 6, 8 to 15. SCSI IDs on all peripherals are set manually with
switches or jumpers on the device itself or set automatically on Compaq
products that support hot-pluggable drives. The SCSI ID determines the
device’s priority when attempting to use the SCSI bus. The highest priority,
SCSI ID 7, is reserved for use by the controller.
Internal Cabling for Compaq Servers
Internal Drives and Cabling
IMPORTANT: Determine if your storage device is a hot-pluggable or a non-hot-pluggable
drive.
IMPORTANT: Port 1 cannot be used for both internal and external drives concurrently
Hot-Plug Drives
■ Install the hot-plug drives into the server hot-plug drive cage.
NOTE: For additional hot-plug drive installation instructions, consult the original
installation information that accompanied your drives.
■ Drives need not be the same capacity, except for maximum space
efficiency when grouped together in the same array.