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? <div class="gmail_quote">On Thu, Oct 21, 2010 at 7:16 AM, Ulrich Windl <<a href="mailto:Ulrich.Windl@rz.uni-regensburg.de">Ulrich.Windl@rz.uni-regensburg.de</a>> wrote: <blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">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kernel: raid1: raid set md5 active with 2 out of 2 mirrors Oct 21 12:29:46 hostname kernel: md5: bitmap file is out of date (0 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 1) -- forcing full recovery Oct 21 12:29:46 hostname kernel: md5: bitmap file is out of date, doing full recovery Oct 21 12:29:46 hostname kernel: attempt to access beyond end of device Oct 21 12:29:46 hostname kernel: dm-14: rw=8, want=62914568,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 -- You received this message because you are subscribed to the Google Groups "open-iscsi" group. To post to this group, send email to <a href="mailto:open-iscsi@googlegroups.com">open-iscsi@googlegroups.com</a>. To unsubscribe from this group, send email to <a href="mailto:open-iscsi%2Bunsubscribe@googlegroups.com">open-iscsi+unsubscribe@googlegroups.com</a>. For more options, visit this group at <a href="http://groups.google.com/group/open-iscsi?hl=en" target="_blank">http://groups.google.com/group/open-iscsi?hl=en</a>. </blockquote></div> -- Rahsaan D. Page