HP Integrity rx4640 Server - Manual (Page 86)

E
Hard Drive Installation and Replacement
Each SCSI channel on the controller supports up to 14 drives. Drives can be of the
Wide Ultra3 or Wide Ultra2 type.
Each drive on a SCSI bus must have a unique ID value in the range 0 to 15 (except
ID 7, which is reserved for controller use). This value is set automatically on hot-
pluggable drives in ProLiant servers and storage systems, but values for other drives
must be set manually.
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Do not terminate the drives. HP and Compaq branded servers and internal
cabling provide the required termination of the SCSI bus.
Do not use drives of different capacity in the same array. The excess capacity of
larger drives cannot be used by the array and is wasted.
Do not use hot-pluggable drives on the same SCSI bus as non-hot-pluggable
drives.
Hard drives that are currently supported by Smart Array controllers are listed at
www.hp.com/products/smartarray .
General Information About Hard Drive Failure
When a hard drive fails, all logical drives that are in the same array will be affected.
Each logical drive in an array may be using a different fault-tolerance method, so
each logical drive can be affected differently.
RAID 0 configurations cannot tolerate drive failure. If any physical drive in the
array fails, all non-fault-tolerant (RAID 0) logical drives in the same array will
also fail.
HP Smart Array 5300 Controller User Guide E-1
HP CONFIDENTIAL
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