On 28/04/18 05:32, Nick Leli wrote: > These (sd[ab]) drives are not explicitly mounted (at least in > /proc/mounts), yet this seems to cause a problem. So I'm curious: > > 1. Is it possible to mount these devices, while a RAID array is active? > 2. If mounting is not possible, is there another way to verify that > each disk contains the correct data (besides /proc/mdstats or dd)? There's nothing there to mount! The only time you can mount a raid member, is if you've got a file-system directly on a v0.9 or v1.0 mirror. You've got a v1.2. To add to that, as I understand you, you have an LVM volume on your raid array. So sd5 contains a raid "whatever-it-is", which then has a lvm "whatever-it-is" starting at some random position within the raid whatever-it-is, which then itself has your file-system at some random position within that! Seeing as mount only works with file-systems, good luck in working out where the file-system is physically located to mount it! Not knowing LVM, it wouldn't surprise me to find it's not actually a contiguous chunk of disk, so mounting it would be extremely dangerous. Oh - and that md5 sum idea *might* work, but the more layers you have in the stack the more likely it is to fail, and any management work like replacing disks is almost certain to mess it up. I'm afraid you'll really have to assume that if all the monitoring tools say every layer is working correctly as designed, that the whole system is okay. Cheers, Wol -- 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
