LSI MegaRAID Express 500 - Manual (Page 131)

Appendix B Audible Warnings 117
B Audible Warnings
The MegaRAID Express 500 RAID controller has an onboard tone generator that
indicates events and errors.
Tone Pattern Meaning Examples
Three seconds on
and one second
off A logical drive is
offline. One or more drives in a RAID
0 configuration failed.
Two or more drives in a RAID
1, 3, or 5 configuration failed.
One second on
and one second
off A logical drive is
running in degraded
mode. One drive in a RAID 3 or 5
configuration failed.
One second on
and three seconds
off An automatically
initiated rebuild has
been completed. While you were away from the
system, a disk drive in a RAID
1, 3, or 5 configuration failed
and was rebuilt.