On 06/01/2016 07:32 AM, Peckins, Steven E wrote: > > On May 31, 2016, at 2:19 PM, Phil Turmel <philip@xxxxxxxxxx> wrote: > >> On 05/30/2016 10:43 PM, Peckins, Steven E wrote: >>> >>> The component devices in the array are supposed to be multipath devices (dm-multipath), but for some reason, when the server was restarted, md grabbed both dm-* components and raw devices. I *think* that this is what caused the problem. >> >> Quite possible. You probably need a DEVICES clause in your mdadm.conf >> to exclude the raw devices from the arrays. > > I had a typo in the DEVICE glob for the system disks (/dev/sd[ab]* instead of /dev/sd[ab][12]). Understood, but be aware that if you have to hotswap one of these system devices, they may not get the sda or sdb name, preventing a re-add or a replacement from joining the array. Since you are having to use /dev/mapper entries for some arrays, consider using /dev/disk/by*/ symlinks for your system arrays. >>> I'm seeking advice on how to proceed at this point. If more information is required, please ask. >> >> Hmmm. The partial success on mdadm --force suggests trying that again. >> Possible with --force twice on the command line. >> >> Forced assembly is precisely what you need -- don't despair and attempt >> anything else. > > Repeating the command was not successful; it is still reporting "/dev/md10 assembled from 5 drives and 1 spare - not enough to start the array." Four drives are listed as “possibly out of date." I assume those are the four that are not being incorporated. > > Output from --assemble --force 1x and 2x: http://pastebin.com/k1dT2zYC { In the future, please paste these in-line so the archives will have them. The size limit for this list is ~ 100k. } I vaguely recall a bug in forced reassembly for many out-of-date drives. Please clone and build the latest mdadm userspace[1] and run that mdadm binary for the forced assembly. Also show the portion of dmesg that corresponds to the attempt. Phil [1] https://github.com/neilbrown/mdadm -- 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
