Users guide

35 Intel® RAID Software User Guide
Caution: It is not recommended to increase the rebuild rate to over 50%. A higher
rebuild rate can result in operating system requests not being serviced in a
timely fashion and causing an operating system error.
• A consistency check scans the consistency of data on a fault-tolerant disk to
determine if data has been corrupted.
• Background initialization is a background check of consistency. It has the same
functionality as the check consistency option but is automatic and can be canceled
only temporarily. If it is canceled, it starts again in a few minutes. Background
initialization is only performed on redundant volumes.
• RAID level migration and online capacity expansion are completed in the
background.
• Patrol Read is a user definable option available in the Intel
®
RAID Web Console 2
that performs drive reads in the background and maps out any bad areas of the
drive.
3.5.5 Error Handling
• Most commands are retried four or more times. The firmware is programmed to
provide the best effort to recognize an error and recover from it if possible.
• Failures are logged and stored in NVRAM. Operating system-based errors are
viewable from the event viewer in the Web Console 2.
• RAID-related errors can be reported by the hard drive firmware, SAF-TE
controller, or the RAID controller firmware. These errors may be reported to the
operating system through RAID management software, through SMART
monitoring, or through CIM management. Some errors may also be reported by the
SAF-TE controller and logged in the system event log (SEL) for the Intel
®
server
board. In addition, the operating system may report access errors. Depending on the
RAID controller and drive enclosure, the error may be evident by the color of
LEDs, the flashing of LEDs, or audible alarms.
3.5.6 Audible Alarm
The following list of beep tones is used on Intel
®
Intelligent RAID Controllers. These
beeps usually indicate that a drive has failed.
• Degraded Array or Disk Group: Short tone, 1 second on, 1 second off
• Failed Array or Disk Group: Long tone, 3 seconds on, 1 second off
• Hot Spare Commissioned - Short tone, 1 second on, 3 seconds off
During a rebuild, the tone alarm stays on. After
the rebuild completes, an alarm with a
different tone will sound.
The disable alarm option in either the Intel
®
RAID BIOS Console 2 or Intel
®
Web
Console 2 management utilities holds the alarm disabled after a power cycle. You must
use the enable alarm option to re-enable the alarm.