Thank you for the encouraging response. I think I would like to attempt to rescue the smaller array first as the data there is somewhat less crucial and I may learn something before working with the more important larger array. > > md1 consists of 4x 4TB drives: > > > > role drive events state > > 0 sdj 5948 AAAA > > 1 sdk 38643 .AAA > > 2 sdl 38643 .AAA > > 3 sdm 38643 .AAA > > This array *should* be easy to recover. Again, use overlays, and > force-assemble sdk, sdl, and sdm. DO NOT include sdj - this was ejected > from the array a long time ago, and including it will seriously mess up > your array. This means you've actually been running a 3-disk raid-0 for > quite a while, so provided nothing more goes wrong, you'll have a > perfect recovery, but any trouble and your data is toast. Is there any > way you can ddrescue these three drives before attempting a recovery? I do have plenty of additional disk space. If I try ddrescue first, will that just give me a backup of the array in case something goes wrong with the force-assemble with overlays? Can you give me some guidance on what to do with ddrescue? Thanks, Bill
