HP Compaq Integrated Smart Array Controller - Manual (Page 123)

Understanding Drive Arrays B-17
Compaq Confidential – Need to Know Required
Writer: CDresden Project: Compaq Integrated Smart Array Controller User Guide Comments:
Part Number: 153236-001 File Name: i-appb Understanding Drive Arrays.doc Last Saved On: 8/27/99 11:35 AM
Dynamic Sector Repairing
Using the dynamic sector repairing process, the controller automatically
remaps any sectors with media faults it detects either during normal operation
or during auto reliability monitoring.
Drive Parameter Tracking
Drive parameter tracking monitors more than 15 drive operational parameters
and functional tests. This includes parameters such as read, write, and seek
errors, spin-up time, cable problems, and functional tests such as track-to-track
seek time, one-third stroke, and full-stroke seek time. Drive parameter tracking
allows the Integrated Smart Array Controller to detect drive problems and
predict drive failure before they actually occur. This function also makes
prefailure warranty possible on Compaq disk drives.
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 which 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 Compaq
authorized reseller for more information on these products.
Interim Data Recovery
In RAID 5 or RAID 1 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.