On Sat, Jun 08, 2019 at 10:47:30AM -0500, Colt Boyd wrote: > I’ve also since tried to reassemble it with the following create but > the XFS fs is not accessible: > 'mdadm --create /dev/md0 --data-offset=1024 --level=6 --raid-devices=5 > --chunk=1024K --name=OMV:0 /dev/sdb1 /dev/sde1 /dev/sdc1 /dev/sdd1 > /dev/sdf1 --assume-clean --readonly' Well, all sorts of things can go wrong with a re-create. You should be using overlays for such experiments. https://raid.wiki.kernel.org/index.php/Recovering_a_failed_software_RAID#Making_the_harddisks_read-only_using_an_overlay_file Also, which kernel version are you running? I think there was a RAID6 bug recently in kernel 5.1.3 or so. https://www.spinics.net/lists/raid/msg62645.html > /dev/sdg1: > Magic : a92b4efc > Version : 1.2 > Feature Map : 0x1 > Array UUID : f8fdf8d4:d173da32:eaa97186:eaf88ded > Name : OMV:0 > Creation Time : Mon Feb 24 18:19:36 2014 > Raid Level : raid6 > Raid Devices : 6 > > Avail Dev Size : 5858529280 (2793.56 GiB 2999.57 GB) > Array Size : 11717054464 (11174.25 GiB 11998.26 GB) > Used Dev Size : 5858527232 (2793.56 GiB 2999.57 GB) > Data Offset : 2048 sectors > Super Offset : 8 sectors > Unused Space : before=1960 sectors, after=2048 sectors > State : clean > Device UUID : 92e022c9:ee6fbc26:74da4bcc:5d0e0409 > > Internal Bitmap : 8 sectors from superblock > Update Time : Thu Jun 6 10:24:34 2019 > Bad Block Log : 512 entries available at offset 72 sectors > Checksum : 8f0d9eb9 - correct > Events : 1010399 > > Layout : left-symmetric > Chunk Size : 1024K > > Device Role : Active device 5 > Array State : AAAAAA ('A' == active, '.' == missing, 'R' == replacing) This already believes to have 6 drives, not in mid-reshape. What you created has 5 drives... that's a bit odd. It could still be normal, metadata for drives that get kicked out is no longer updated after all, and I haven't tested it myself... --examine of the other drives (before re-create) would be interesting. If those are not available, maybe syslogs of the original assembly, reshape and subsequent recreate. Otherwise you have to look at the raw data (or try blindly) to figure out the data layout. Please use overlays for experiments... Good luck. Regards Andreas Klauer
