RAID Alert... Redundant Arrays of Inexpensive Disks (RAIDs) allow safe and inexpensive storage of important data using two (or more) hard disks - either internally or as Firewire drives.
Apple delivers software for buidling mirrored software RAIDs with every copy of Mac OS X.
RAID Volumes continue to work even if one drive failes. However, the failed drive should be replaced ASAP. Without RAID Alert, those failures might go unnoticed!
RAID Alert informs you about any RAID systems' status changes (esp. failures) via email, a notification dialog and/or alert sound.
No need to be logged in. RAID Alert's Daemon fully works with no user logged in or on headless systems (without a display).
SUJATA What a nice and hassle free utility that gives me peace of mind. Exactly what you need on an unattended server. One more thing that I don't need to worry about. (Version 2.0)
Having a Raid (level 1) set up for my working files has been wonderful. each morning, first thing, I: Open Disk Utility. Select my RAID. Click on the "RAID" tab and see that it says 'Online.' Takes about 10 seconds. Now I feel ever so much better, knowing that I have also saved $40 ! (Version 1.0)