HP A7143A RAID160 SA Controller Support Guide, February 2007

Hard Drive Installation and Replacement
General Information About Hard Drive Failure
Appendix C
103
• The amber LED lights up on the front of supported StorageWorks™ disk enclosures, if failed drives are
inside. (Other problems such as fan failure, redundant power supply failure, or over-temperature
conditions, will also cause this LED to light up.)
• Event Monitoring Services (EMS) will cause an alert message to be sent when physical or logical drive
failure occurs. See “Event Monitoring Service (EMS)” on page 78, for details.
The sautil <device_file> command, can be used to investigate undetected disks.
The SCSI DEVICE SUMMARY section of the sautil <device_file> command output lists all of the disks the
firmware has detected.
The Participating Physical Disk(s) section of the LOGICAL DRIVE information contained in the sautil
<device_file> command output lists the channel and SCSI ID of all of the physical disks that have been
assigned to a logical drive.
By comparing the Participating Physical Disk(s) to the SCSI DEVICE SUMMARY, you can determine if
disks are missing or failed.
For example, in the following sautil <device_file> command output excerpt, the physical disk on channel
1 with a SCSI ID of 1 does not show up in the SCSI Device Summary, however, it is listed as a participating
physical disk in Logical Drive 0.
---- LOGICAL DRIVE SUMMARY ---------------------------------------------------
# RAID Size Status
0 1+0 17365 MB USING INTERIM RECOVERY MODE
---- SCSI DEVICE SUMMARY -----------------------------------------------------
Ch ID Type Capacity Status
1 0 DISK 18.2 GB OK
1 7 PROCESSOR N/A N/A
---- LOGICAL DRIVE 0 ---------------------------------------------------------
Logical Device File................. c6t0d0
Fault Tolerance Mode................ RAID 1+0 (Disk Mirroring)
Logical Drive Status................ USING INTERIM RECOVERY MODE
# of Participating Physical Disks... 2
Participating Physical Disk(s)...... Ch:ID
1: 0
1: 1
Participating Spare Disk(s)......... Ch:ID
none
Stripe Size......................... 64 KB
Logical Drive Cache Status.......... cache enabled
Configuration Signature............. 0xA36E047E
Media Exchange Detected?............ no
For more information on the sautil command see “Troubleshooting with sautil” on page 80.