On 19/03/20 19:55, Glenn Greibesland wrote: > After a bit of digging in the manual and on different forums I have > concluded that the next step for me is to recreate the array using > –assume-clean and –data-offset=variable. > I have tried a dry run of the command (answering no to “Continue > creating array”), and mdadm accepts the parameters without any errors: Oh my god NO!!! Do NOT use --create unless someone rather more experienced than me tells you to!!! The obvious thing is to somehow get the sixteen drives that you know should be okay, re-assembled in a forced manner. The --re-add should not have done any real damage because, as mdadm keeps complaining, you didn't have enough drives so it won't have touched the data on that drive. Unfortunately, my fu isn't good enough to tell you how to get that drive back in. What's wrong with the two failed drives? Can you ddrescue them? They might be enough to get you going again. You say you've read the web page "Raid recovery" - which says it's obsolete and points you at "When things go wrogn" - but you don't appear to have read that! PLEASE read "asking for help" and in particular you NEED to run lsdrv and give us that information. Without that, if you DO run --create, you will be in for a world of hurt. I know you may feel it's asking for loads of information, and the resulting email will be massive, but trust me - the experts will look at it and they will probably be able to come up with a plan of action. At present, they don't have much to go on, and nor will you if carry on as you're going ... Cheers, Wol
