On 01/27/2013 08:52 AM, Theo Cabrerizo Diem wrote: > Hello, > > I had (hopefully still have ;) ) a raid5 setup using 4x 2Tb HDDs. > Recently when I was on vacations one disk failed and before I could > come back (15 days after) a second one failed also. > > Of course I had no backups ;) and to make it worse the raid device had > luks running on top of it, but that would come later. Just as > clarfication I did encrypt the md device, and not built a md on top of > luks devices. > > I did read the wiki, and took a copy of mdadm --examine /dev/sd[ghij]1 > before doing anything. I've tried to run : > > mdadm --create --assume-clean --level=5 --chunk 64 --raid-devices=4 > /dev/md/stuff1 /dev/sdh1 /dev/sdg1 /dev/sdj1 /dev/sdi1 For some reason, people are unwilling to use "--assemble --force", which is made for these situations. This is the correct device order, though, so you aren't toast yet. > Including the "supposed" correct order taken from examine command and > all possible permutations of the disk orders with no luck. > > From there I have three questions : > - From the output of --examine I have "Chunk Size: 64K". I suppose I > should add "--chunk 64" on the mdadm --create line right? Yes. > - Should I attempt "mdadm --create" command with just the last 3 good > disks and a "missing" one or should I attempt with all four ? > - Any further suggestions to try to recover it ? I would leave out the disk that failed first (/dev/sdg1, I believe). Presumably there was still some activity on the system? > Following my output of mdadm --examine after a reboot (don't know why > the distro detected and assembled the raid with only two devices in a > inactive state) The appended --examine reports show a creation time from 2011, but an update time from just a little while ago. Did you cancel the "--create" operation(s)? (That would be good, actually.) Please show the saved "--examine" reports, and current "--examine" reports. It wouldn't hurt to also post the "smartctl -x" for each of these drives. Phil -- To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
