On Fri, 9 Mar 2001, Benoit SERRA wrote: > > > 3) Any ideas on a path to take to replace the failed disk in the RAID 0 > > setup, without losing data? > > > > In fact, with RAID 0, if one drive fail, you lose all the data you had > on this drive. If you are doing stripping, you'll lose almost > everything. It's written in the howto : it is not possible to recover > from a disk failure with raid 0. !! I know the differences between RAID levels and I now that RAID 0 is non-redundant. I'm not looking for a RAID level to do something it wasn't designed for. What I'm looking to accomplish is to find a way to get one disk out off an array of three disks, two of which are good and one which periodically fails. The array is mostly functional; when the drive fails, I just reconfigure the RAID formatting in the PERC BIOS and after a fsck, it comes back up but I'm playing Russian Roulette with it - sometime it will fail totally I'm sure. I see two ways of doing it: the first is to low-level image the drive that is periodically failing, reinsert that into the array and hope everything works. The other is to dump the filesystem to something else, remove the failing disk, recreate the array, then restore the filesystem. Its not too hard to backup the filesystem but its harder to restore since I'll have to boot from some other medium or remove the drives and create the array in another machine and then restore. I was hoping to leave them in place. I was looking for pros and cons to each method and possibly experiences with such a situation. > > If you want a fault tolerant sertup, use RAID 1 or RAID 5, but you 'll > have only 18 GB usable with RAID 5 and 9 with RAID 1 but, in this case, > you will survive a two disk failure. I only have three disks, so I can't survive a two disk failure. Kevin -- Kevin M. Myer Systems Administrator Lancaster-Lebanon Intermediate Unit 13 (717)-560-6140 - To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to [EMAIL PROTECTED]
