User guide

E-18 Compaq StorageWorks RAID Array 4100 User Guide
Drive Failure Alert Features
Drive failure features produce various drive alerts or error messages depending
on the Compaq server model. Refer to the documentation included with your
server to determine what drive failure features are included on your server
model.
Other Compaq options such as Compaq Insight Manager and Compaq Server
Manager/R provide additional drive failure features. See your Authorized
Compaq Reseller for more information on these products.
Interim Data Recovery
In RAID 1, RAID 4, or RAID 5 fault tolerant configurations, if a drive fails,
the system continues to operate in an interim data recovery mode. For
example, if you had selected RAID 5 for a logical drive with four physical
drives and one of the drives fails, the system continues to process I/O requests,
but at a reduced performance level. Replace the failed drive as soon as
possible to restore performance and full fault tolerance for that logical drive.
Automatic Data Recovery
After a failed drive is replaced, automatic data recovery reconstructs the data
and places it on the replaced drive. This allows a rapid recovery to full
operating performance without interrupting normal system operations.
NOTE: You must specify RAID 5, RAID 4, or RAID 1 through the Array Configuration Utility
to make the recovery feature available. The drive failure alert system and automatic data
recovery are functions of the controller, and they operate independently of the operating
system.