Avago Technologies MegaRAID Fast Path Software - Manual (Page 31)

LSI Corporation Confidential | July 2011 Page 31
MegaRAID SAS Software User Guide Chapter 2: Introduction to RAID | Components and Features
2.4.17 Virtual Drive States The virtual drive states are described in Table 5 .
2.4.18 Beep Codes An alarm sounds on the MegaRAID controller when a virtual drive changes from an
optimal state to another state, when a hot spare rebuilds, and for test purposes.
Unconfigured Bad A drive on which the firmware detects an unrecoverable error; the drive was
Unconfigured Good or the drive could not be initialized.
Missing A drive that was Online but which has been removed from its location.
Offline A drive that is part of a virtual drive but which has invalid data as far as the
RAID configuration is concerned.
Table 4: Drive States (Continued)
State Description
Table 5: Virtual Drive States
State Description
Optimal The virtual drive operating condition is good. All configured drives are
online.
Degraded The virtual drive operating condition is not optimal. One of the configured
drives has failed or is offline.
Partial Degraded The operating condition in a RAID 6 virtual drive is not optimal. One of the
configured drives has failed or is offline. RAID 6 can tolerate up to two drive
failures.
Failed The virtual drive has failed.
Offline The virtual drive is not available to the RAID controller.
Table 6: Beep Codes, Events, and Virtual Drive States
Event Virtual Drive State Beep Code
RAID 0 virtual drive loses a virtual
drives Offline 3 seconds on and 1 second off
RAID 1 loses a mirror drive Degraded 1 second on and 1 second off
RAID 1 loses both drives Offline 3 seconds on and 1 second off
RAID 5 loses one drive Degraded 1 second on and 1 second off
RAID 5 loses two or more drives Offline 3 seconds on and 1 second off
RAID 6 loses one drive Partially
Degraded 1 second on and 1 second off
RAID 6 loses two drives Degraded 1 second on and 1 second off
RAID 6 loses more than two drives Offline 3 seconds on and 1 second off
A hot spare completes the rebuild
process and is brought into a drive
group N/A 1 second on and 3 seconds off