User guide

Installation Preparation 2-5
Drive Considerations
If you will be installing or replacing drives in your Compaq server, keep in
mind that:
■ Drives may be Wide Ultra3 SCSI, Wide Ultra2 SCSI or Wide-Ultra
SCSI-3. To maximize performance, the drives must all be the same type.
■ Drives on a single SCSI bus may be internal or external, but not both.
■ Drives should not contain termination. Compaq servers and internal
cabling provide the required termination of the SCSI bus.
■ For the most current list of Compaq hard drives supported by the Smart
Array 431 Controller, refer to the website,
www.compaq.com/products/StorageWorks/harddiskstorage.
■ Drives should be of the same capacity to provide the greatest storage
space efficiency when drives are grouped together into the same drive
array.
Determining Maximum Storage Capacity
The maximum number of controllers and drives supported depends on several
factors. To determine the number of drives supported by your server, refer to
the Setup and Installation, or Reference Guide that accompanied your server.
Server specifications are also available at www.compaq.com. For information
on expanding storage capacity, see the section in Appendix D, “Adding
Storage Capacity.”