On Wed, 25 Apr 2012 10:04:19 +0200 Peter Rabbitson <rabbit+list@xxxxxxxxx> wrote: > I am facing a problem which I believe is new (I distinctly remember > doing the same on 2.6.somethingold couple years ago). When I try to > grow an array where all memembers have been replaced with large ones > I get an inexplicable. > > kernel: md: couldn't update array info. -22 > > Nothing else. I am using kernel 3.2.0 and mdadm 3.2.3, both from > debian: > http://packages.debian.org/sid/linux-image-3.2.0-2-amd64 (3.2.15-1) > http://packages.debian.org/sid/mdadm (3.2.3-2) > > Here is my full test setup replicating the problem (was replicated > on a different machine). Let me know if I can assist further in > figuring this out: > > root@Thesaurus:~/raidfail# for n in $(seq 4) ; do dd if=/dev/zero of=member_$n.img bs=1M count=256 ; done > > root@Thesaurus:~/raidfail# for n in $(seq 4) ; do losetup /dev/loop$n member_$n.img ; done > > root@Thesaurus:~/raidfail# losetup -a > /dev/loop1: [fd01]:1081442 (/root/raidfail/member_1.img) > /dev/loop2: [fd01]:1081481 (/root/raidfail/member_2.img) > /dev/loop3: [fd01]:1081483 (/root/raidfail/member_3.img) > /dev/loop4: [fd01]:1081515 (/root/raidfail/member_4.img) > > root@Thesaurus:~/raidfail# mdadm -C /dev/md1010 -l 10 -p f3 -n 4 -c 256 -e 1.2 -z 128M /dev/loop[1234] > mdadm: largest drive (/dev/loop1) exceeds size (131072K) by more than 1% > Continue creating array? y > mdadm: array /dev/md1010 started. > > root@Thesaurus:~/raidfail# mdadm -w /dev/md1010 > > root@Thesaurus:~/raidfail# cat /proc/mdstat > Personalities : [raid1] [raid6] [raid5] [raid4] [raid10] > md1010 : active raid10 loop4[3] loop3[2] loop2[1] loop1[0] > 174080 blocks super 1.2 256K chunks 3 far-copies [4/4] [UUUU] ^^^^^^^^^^^^ You cannot resize a 'far' RAID10. In fact in 3.2 you cannot resize *any* RAID10. That is only available in 3.4-rc, and even then only for 'near' and 'offset' layouts. > > (Note - no bitmaps, no anything) > > root@Thesaurus:~/raidfail# mdadm --grow --size=max /dev/md1010 > mdadm: Cannot set device size for /dev/md1010: Invalid argument So here, "Invalid argument" means you asked it to do something that it cannot do - your request was invalid. NeilBrown > > > root@Thesaurus:~/raidfail# tail /var/log/kern.log > Apr 25 09:52:36 localhost kernel: md: using maximum available idle IO bandwidth (but not more than 30000 KB/sec) for resync. > Apr 25 09:52:36 localhost kernel: md: using 128k window, over a total of 174080k. > Apr 25 09:52:42 localhost kernel: md: md1010: resync done. > Apr 25 09:52:43 localhost kernel: RAID10 conf printout: > Apr 25 09:52:43 localhost kernel: --- wd:4 rd:4 > Apr 25 09:52:43 localhost kernel: disk 0, wo:0, o:1, dev:loop1 > Apr 25 09:52:43 localhost kernel: disk 1, wo:0, o:1, dev:loop2 > Apr 25 09:52:43 localhost kernel: disk 2, wo:0, o:1, dev:loop3 > Apr 25 09:52:43 localhost kernel: disk 3, wo:0, o:1, dev:loop4 > Apr 25 09:53:39 localhost kernel: md: couldn't update array info. -22 > > > root@Thesaurus:~/raidfail# mdadm -D /dev/md1010 > /dev/md1010: > Version : 1.2 > Creation Time : Wed Apr 25 09:52:24 2012 > Raid Level : raid10 > Array Size : 174080 (170.03 MiB 178.26 MB) > Used Dev Size : 130560 (127.52 MiB 133.69 MB) > Raid Devices : 4 > Total Devices : 4 > Persistence : Superblock is persistent > > Update Time : Wed Apr 25 09:52:43 2012 > State : clean > Active Devices : 4 > Working Devices : 4 > Failed Devices : 0 > Spare Devices : 0 > > Layout : far=3 > Chunk Size : 256K > > Name : Thesaurus:1010 (local to host Thesaurus) > UUID : 19aeca84:142ee179:b344a19d:08a730fc > Events : 17 > > Number Major Minor RaidDevice State > 0 7 1 0 active sync /dev/loop1 > 1 7 2 1 active sync /dev/loop2 > 2 7 3 2 active sync /dev/loop3 > 3 7 4 3 active sync /dev/loop4 > > root@Thesaurus:~/raidfail# mdadm -E /dev/loop1 > /dev/loop1: > Magic : a92b4efc > Version : 1.2 > Feature Map : 0x0 > Array UUID : 19aeca84:142ee179:b344a19d:08a730fc > Name : Thesaurus:1010 (local to host Thesaurus) > Creation Time : Wed Apr 25 09:52:24 2012 > Raid Level : raid10 > Raid Devices : 4 > > Avail Dev Size : 522240 (255.04 MiB 267.39 MB) > Array Size : 261120 (127.52 MiB 133.69 MB) > Used Dev Size : 261120 (127.52 MiB 133.69 MB) > Data Offset : 2048 sectors > Super Offset : 8 sectors > State : clean > Device UUID : d7734a6c:5df0c7cc:b5f7dc04:6595a5eb > > Update Time : Wed Apr 25 09:53:05 2012 > Checksum : 22c8ad18 - correct > Events : 17 > > Layout : far=3 > Chunk Size : 256K > > Device Role : Active device 0 > Array State : AAAA ('A' == active, '.' == missing) > -- > 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
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