RAID 5 array offline due to power failure on more than 2 drives. How to recover?
Posted on 2005-04-18
I have a Promise SuperTrak SX6000 IDE RAID controller card. This past weekend I lost power to 5 of the 6 drives in the raid set. I did not lose power to the computer, just the drives. The drives are still in good condition. Only the loss of power to the caused the raid set to fail. The 5 drives show up in the controller configuration as offline. Once I get power restored to them, is it possible to get the RAID 5 stripe back online in its original state so I can access the data?
On Promise.com, they specifically mention RAID 0 in their FAQs. However, there is no mention of RAID 5. Here is the FAQ.
567 My RAID 0 array went offline. How can I recover my data?
If one of the RAID 0 hard drives has failed, it is not possible to recover your data. If all of the members of the array are still functioning, it may be possible to recover your data. In the FastBuild BIOS utility, delete the array and re-create it [ IMPORTANT: Make sure that when you recreate the array you use exactly the same array settings (RAID level, drive assignments, and stripe size) of the original array ]. Going offline may indicate trouble with a hard drive, so it is recommended to perform a data backup and then perform a disk diagnostic on the hard drives.
Should I assume that it is the same procedure for RAID 5? I am looking for someone who has had experiance in this area so I can eliminate the guesswork. Thanks.