[dm-devel] Q: md-RAID1 creation with I/O error (attempt to access beyond end of device)

[Rahsaan Page]

Hi Ulrich,

I dont think thats going to work, arent you suppose to create the raid with
xdisk, than create LVM on top of the raid?

On Thu, Oct 21, 2010 at 7:16 AM, Ulrich Windl <
Ulrich.Windl at rz.uni-regensburg.de> wrote:

> Hi,
>
> not an iSCSI question, but maybe here's the right audience: I had
> sucessfully created a RAID1 using mdadm, multipath, iSCSI and some SAN
> storage on SLES10 SP3+Updates on x86_64. When I tried to do the same thing
> on a comparable machine, the RAID could not be created, because something
> tried to access the disk at a bad position. I reapeated the attempt with
> another set of disks of the same size, and it also failed.
>
> Details:
> # mdadm --verbose --create /dev/md5 --raid-devices=2 --level=raid1
> --bitmap=internal --assume-clean /dev/mapper/EVA1_L232_host05
> /dev/mapper/EVA2_L232_host05
> mdadm: /dev/mapper/EVA1_L232_host05 appears to be part of a raid array:
>    level=raid1 devices=2 ctime=Thu Oct 21 12:26:18 2010
> mdadm: /dev/mapper/EVA2_L232_host05 appears to be part of a raid array:
>    level=raid1 devices=2 ctime=Thu Oct 21 12:26:18 2010
> mdadm: size set to 31457216K
> Continue creating array? y
> mdadm: RUN_ARRAY failed: Input/output error
> mdadm: stopped /dev/md5
> hostname:~ # tail -24 /var/log/messages
>     Oct 21 12:28:05 hostname kernel: md: md5 stopped.
> Oct 21 12:28:07 hostname kernel: md: md5 stopped.
> Oct 21 12:29:46 hostname kernel: md: bind<dm-21>
> Oct 21 12:29:46 hostname kernel: md: bind<dm-14>
> Oct 21 12:29:46 hostname kernel: raid1: raid set md5 active with 2 out of 2
> mirrors
> Oct 21 12:29:46 hostname kernel: md5: bitmap file is out of date (0 < 1) --
> forcing full recovery
> Oct 21 12:29:46 hostname kernel: md5: bitmap file is out of date, doing
> full recovery
> Oct 21 12:29:46 hostname kernel: attempt to access beyond end of device
> Oct 21 12:29:46 hostname kernel: dm-14: rw=8, want=62914568, limit=62914560
> Oct 21 12:29:46 hostname kernel: attempt to access beyond end of device
> Oct 21 12:29:46 hostname kernel: dm-21: rw=8, want=62914568, limit=62914560
> Oct 21 12:29:46 hostname kernel: md5: bitmap initialized from disk: read
> 15/16 pages, set 489472 bits, status: -5
> Oct 21 12:29:46 hostname kernel: md5: failed to create bitmap (-5)
> Oct 21 12:29:46 hostname kernel: md: pers->run() failed ...
> Oct 21 12:29:46 hostname kernel: md: md5 stopped.
> Oct 21 12:29:46 hostname kernel: md: unbind<dm-14>
> Oct 21 12:29:46 hostname kernel: md: export_rdev(dm-14)
> Oct 21 12:29:46 hostname kernel: md: unbind<dm-21>
> Oct 21 12:29:46 hostname kernel: md: export_rdev(dm-21)
>
> hostname:~ # mdadm --query -X /dev/mapper/EVA2_L232_host05
> mdadm: WARNING: bitmap file is not large enough for array size 62914432!
>
>        Filename : /dev/mapper/EVA2_L232_host05
>           Magic : 6d746962
>         Version : 4
>            UUID : c522ab5a:24f292a0:0b3d7356:64ade12a
>          Events : 0
>  Events Cleared : 0
>           State : Out of date
>       Chunksize : 64 KB
>          Daemon : 5s flush period
>      Write Mode : Normal
>       Sync Size : 31457216 (30.00 GiB 32.21 GB)
>          Bitmap : 489472 bits (chunks), 489472 dirty (100.0%)
> hostname:~ # mdadm --query -X /dev/mapper/EVA1_L232_host05
> mdadm: WARNING: bitmap file is not large enough for array size 62914432!
>
>        Filename : /dev/mapper/EVA1_L232_host05
>           Magic : 6d746962
>         Version : 4
>            UUID : c522ab5a:24f292a0:0b3d7356:64ade12a
>          Events : 0
>  Events Cleared : 0
>           State : Out of date
>       Chunksize : 64 KB
>          Daemon : 5s flush period
>      Write Mode : Normal
>       Sync Size : 31457216 (30.00 GiB 32.21 GB)
>          Bitmap : 489472 bits (chunks), 489472 dirty (100.0%)
>
> "blockdev --getsize" reports "62914560" for each LUN being used.
>
> Regards,
> Ulrich
>
>
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-- 
Rahsaan D. Page
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