On Mon, 21 Dec 2009 03:41:33 +0000 Kristleifur Daðason <kristleifur@xxxxxxxxx> wrote: > Hi all, > > I wish to convert my 3-drive RAID-5 array to a 6-drive RAID-6. I'm on > Linux 2.6.32.2 and have mdadm version 3.1.1 with the 32-bit-array-size > patch from here: http://osdir.com/ml/linux-raid/2009-11/msg00534.html > > I have three live drives and three spares added to the array. When I > initialize the command, mdadm does the initial checks and aborts with > a "cannot set device shape" without doing anything to the array. > > Following are some md stats and growth command output: > > ___ > > $ cat /proc/mdstat > Personalities : [linear] [multipath] [raid0] [raid1] [raid6] [raid5] > [raid4] [raid10] > md_d1 : active raid5 sdd1[6](S) sdc1[5](S) sdb1[4](S) sdf1[1] sde1[0] sdl1[3] > 2930078720 blocks super 1.1 level 5, 256k chunk, algorithm 2 [3/3] [UUU] > bitmap: 1/350 pages [4KB], 2048KB chunk > > $ mdadm --detail --scan > ARRAY /dev/md/d1 metadata=1.01 spares=3 name=mamma:d1 > UUID=da547022:042a6f68:d5fe251e:5e89f263 > > $ mdadm --grow /dev/md_d1 --level=6 --raid-devices=6 > --backup-file=/root/backup.md1_to_r6 > mdadm: metadata format 1.10 unknown, ignored. > mdadm: metadata format 1.10 unknown, ignored. > mdadm level of /dev/md_d1 changed to raid6 > mdadm: Need to backup 1024K of critical section.. > mdadm: Cannot set device shape for /dev/md_d1 > mdadm: aborting level change > ___ > > > Three questions - > > 1. What does the stuff about "metadata format 1.10 unknown" mean? > Notice the "super 1.1" vs. "metadata 1.01" vs. "metadata format 1.10" > disrepancy between mdsat, --detail and --grow output. The metadata format .. unknown means that your /etc/mdadm.conf contains something like metadata=1.10 > > 2. Am I doing something wrong? :) Not obviously. > > 3. How can I get more info about what is causing the failure to > initialize the growth? Look in the kernel logs. e.g. dmesg | tail -20 immediately after the "mdadm --grow" attempt. I just tried the same thing and it worked for me. NeilBrown -- 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
