Hi, I am facing an issue during RAID1 resync. I have an ubuntu 4.4.0-31-generic running with raid1 configured with 2 disks as active and 2 as spares. On the first powercycle, after installing RAID, i see the following messages in kern.log My disks are configured with 4K sector size (both logical and physical) (sda and sdb are active disks for this raid) =========== Oct 18 03:52:56 kernel: [ 52.869113] md: using 128k window, over a total of 51167104k. Oct 18 03:52:56 kernel: [ 52.869114] md: resuming resync of md2 from checkpoint. Oct 18 03:52:56 kernel: [ 52.869378] sd 0:0:0:0: [sda] Bad block number requested Oct 18 03:52:56 kernel: [ 52.869414] sd 0:0:0:0: [sda] Bad block number requested Oct 18 03:52:56 kernel: [ 52.869436] sd 0:0:0:0: [sda] Bad block number requested Oct 18 03:52:56 kernel: [ 52.869465] sd 0:0:0:0: [sda] Bad block number requested Oct 18 03:52:56 kernel: [ 52.869503] sd 0:0:1:0: [sdb] Bad block number requested Oct 18 03:52:56 kernel: [ 52.869536] md/raid1:md2: sda: unrecoverable I/O read error for block 3 Oct 18 03:52:56 kernel: [ 52.869581] md: md2: resync interrupted. Oct 18 03:52:56 kernel: [ 52.869584] sd 0:0:0:0: [sda] Bad block number requested Oct 18 03:52:56 kernel: [ 52.869609] sd 0:0:0:0: [sda] Bad block number requested Oct 18 03:52:56 kernel: [ 52.869633] sd 0:0:1:0: [sdb] Bad block number requested Oct 18 03:52:56 kernel: [ 52.869692] md/raid1:md2: sda: unrecoverable I/O read error for block 131 Oct 18 03:52:56 kernel: [ 52.869735] sd 0:0:0:0: [sda] Bad block number requested Oct 18 03:52:56 kernel: [ 52.869808] sd 0:0:1:0: [sdb] Bad block number requested Oct 18 03:52:56 kernel: [ 52.869837] md/raid1:md2: sda: unrecoverable I/O read error for block 259 Oct 18 03:52:56 kernel: [ 52.869908] sd 0:0:0:0: [sda] Bad block number requested Oct 18 03:52:56 kernel: [ 52.869958] sd 0:0:1:0: [sdb] Bad block number requested Oct 18 03:52:56 kernel: [ 52.870022] md/raid1:md2: sda: unrecoverable I/O read error for block 387 =========== Seems to be an unaligned access from mdraid1 during resync. Do you have any idea, why we are seeing it. How do i debug this issue. I was looking at the following patch ( http://marc.info/?l=linux-raid&m=142405887609959&w=2 ), by Nate in the function narrow_write_error(), where the alignment was made correctly to disk sector size. Do you think, similar roundups are required in resync path as well. More info: 1) We have checks for previous raid configurations present in device partitions ( we do mdadm --examine and if present, we zero out superblocks) 2) Each device is partitioned into 4 and used for 4 different raid devices. 3) Say sda is partitioned into 4 (sda1,sda2,sda3,sda4) and each partition is part of one raid device. 4) Raid1 create command. /sbin/mdadm --quiet --create /dev/md1 --force --level=1 --metadata=default --raid-devices=2 /dev/sda1 /dev/sdb1 --spare-devices=2 /dev/sdc1/dev/sdd1 Thanks in advance, Viswesh -- 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
