On Fri, Mar 09, 2012 at 07:15:43PM +0100, Vladimir 'φ-coder/phcoder' Serbinenko wrote: > The thing is: raid_disks = 2 in your metadata. I don't know how this > could be correct or how you could land with such a config. > @md: The problem is following: Lennart has a raid 1 on 3 disks, however > raid_disks in sdd2 is 2 and dev_roles contains only [0, 1, -1, -1, ...], > dev_number is 0 > sda2 and sdb2 contain proper raid_disks=3, dev_roles=[0,1,2,-1,-1,..] > and dev_number= 0 respectively 1. It looks to me as a seriously damaged > metadata but apparently mdadm has no problem > @Lennart: did you dd one disk to another or done something like this?
No. I did 'dd if=/dev/sda of=/dev/sdd bs=512 count=1' to copy the partition table, then I did 'hdparm -z /dev/sdd' to reread the partition table. I then did 'mdadm --add /dev/md1 /dev/sdd3' to add the final device to md1 so that it could get raid running fully (I created it with 2/3 devices in degraded mode). For md0 I added a third raid1 device just to have all 3 disks able to serve as root even if a disk fails, and to ensure I could boot no matter what disk failed. For completeness sake I did actually add /dev/sdc which was an external USB drive to the raid5 (/dev/md1) first, just to keep the raid safe until the final internal drive arived. I then added /dev/sdd3, which became a hot spare, and then marked sdc3 as faulty, which got the raid to resync onto the new drive. > root@rceng03new:~# mdadm --detail /dev/md0 > /dev/md0: > Version : 1.2 > Creation Time : Wed Feb 8 14:39:24 2012 > Raid Level : raid1 > Array Size : 976884 (954.15 MiB 1000.33 MB) > Used Dev Size : 976884 (954.15 MiB 1000.33 MB) > Raid Devices : 3 > Total Devices : 3 > Persistence : Superblock is persistent > > Update Time : Thu Mar 1 15:02:06 2012 > State : clean > Active Devices : 3 > Working Devices : 3 > Failed Devices : 0 > Spare Devices : 0 > > Name : rceng03new:0 (local to host rceng03new) > UUID : 88d43dc8:2888fece:34c1486f:49caa398 > Events : 74 > > Number Major Minor RaidDevice State > 0 8 2 0 active sync /dev/sda2 > 1 8 18 1 active sync /dev/sdb2 > 2 8 50 2 active sync /dev/sdd2 -- Len Sorensen _______________________________________________ Grub-devel mailing list Grub-devel@gnu.org https://lists.gnu.org/mailman/listinfo/grub-devel
