I have an older Apple XRaid with 14x 750GB EIDE drives. The RAID is set up with drives 1-7 in a RAID 0 stripe and drives 8-14 in a second RAID 0 stripe, then the two stripes are mirrored.
Drive 9 has failed and has been replaced. During this time the data has remained accessible, exactly as planned. Replacing the drive physically did not cause this ideal RAID configuration to be reestablished, however.
I could use a hand/verification in getting this back properly configured with mirrored stripes.
Currently, Disk Utility shows the following (all colors accurate as shown)
5.25 TB APPLE Xserve RAID Media
__[=gray]RAID Slice for "Storage"/color
5.25 TB APPLE Xserver RAID Media
__[=red]RAID Slice for "Storage"/color
[=orange]5.25 TB Storage/color
Further, it indicates that the Mirrored RAID Set is "[=orange]Degraded/color" and the second 5.25 TB RAID Slice (disk1s2) is "[=red]Failed/color"
So far, so good - it looks like it simply did not rebuild the setup and it needs to be recreated manually - not unexpected from a stripe failure.
RAID Admin shows the following:
__- All drives are Status OK
__- Drive 9 (the original failed drive) is Status: OK, Type:Spare, but does not have a  on it, indicating that it is not part of the array
At this pint I have poked around in RAID Admin's Utilities and Advanced sections, but I am not familiar enough with RAID Admin specifically to feel comfortable enough to actually try functions and overcome some of the scary-sounding warnings :wink:
A couple more symptoms:
It [u]looks/u like what I need to do is to delete Array 2 and recreate it, then recreate the mirror.
So, the question is, what do I need to do in order to recreate this RAID setup - both the stripe array and then the mirror?
Also, will this require downtime or merely cause poor performance while it rebuilds the mirror?/u