On Thu, 8 Mar 2012 17:11:17 +0100 Arkadiusz Miśkiewicz <a.miskiewicz@xxxxxxxxx> wrote: > Hello. > > I'm trying to create internal bitmap on freshly created > raid1 array on 3.2.6 kernel. > > What's going on and how to fix this problem? There is a bug in the latest mdadm which causes this. It is fixed in git, or use a slightly older mdadm. I notice a subsequent email where it magically started working. I cannot explain that - something must have happened to trigger it. NeilBrown > > [root@setebos ~]# mdadm /dev/md3 --grow --bitmap=internal > mdadm: failed to set internal bitmap. > [root@setebos ~]# dmesg|tail -n 16 > [10455.564598] mdadm: sending ioctl 1261 to a partition! > [10455.564601] mdadm: sending ioctl 1261 to a partition! > [10455.566566] mdadm: sending ioctl 1261 to a partition! > [10455.566570] mdadm: sending ioctl 1261 to a partition! > [10455.568480] md3: invalid bitmap file superblock: bad magic > [10455.568483] md3: bitmap file superblock: > [10455.568485] magic: 00000000 > [10455.568487] version: 0 > [10455.568489] uuid: 00000000.00000000.00000000.00000000 > [10455.568491] events: 0 > [10455.568492] events cleared: 0 > [10455.568494] state: 00000000 > [10455.568495] chunksize: 0 B > [10455.568497] daemon sleep: 0s > [10455.568498] sync size: 0 KB > [10455.568499] max write behind: 0 > [root@setebos ~]# mdadm --detail /dev/md3 > /dev/md3: > Version : 1.2 > Creation Time : Thu Mar 8 13:54:16 2012 > Raid Level : raid1 > Array Size : 931760807 (888.60 GiB 954.12 GB) > Used Dev Size : 931760807 (888.60 GiB 954.12 GB) > Raid Devices : 2 > Total Devices : 2 > Persistence : Superblock is persistent > > Update Time : Thu Mar 8 18:46:11 2012 > State : clean > Active Devices : 2 > Working Devices : 2 > Failed Devices : 0 > Spare Devices : 0 > > Name : rescue:3 > UUID : 390e347b:c63b1a0e:1ff4f4a5:bc51f5c6 > Events : 24 > > Number Major Minor RaidDevice State > 0 8 4 0 active sync /dev/sda4 > 1 8 20 1 active sync /dev/sdb4 > [root@setebos ~]# cat /proc/mdstat > Personalities : [raid1] > md3 : active raid1 sda4[0] sdb4[1] > 931760807 blocks super 1.2 [2/2] [UU] > > md1 : active raid1 sda2[0] sdb2[1] > 995904 blocks [2/2] [UU] > > md0 : active raid1 sda1[0] sdb1[1] > 3999117 blocks super 1.2 [2/2] [UU] > > md2 : active raid1 sda3[0] sdb3[1] > 40000754 blocks super 1.2 [2/2] [UU] > bitmap: 1/1 pages [4KB], 65536KB chunk > > unused devices: <none> > [root@setebos ~]# > >
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