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Re: grub-probe seems to be having problems
From: |
Lennart Sorensen |
Subject: |
Re: grub-probe seems to be having problems |
Date: |
Fri, 9 Mar 2012 13:39:46 -0500 |
User-agent: |
Mutt/1.5.20 (2009-06-14) |
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.
> address@hidden:~# 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
- Re: grub-probe seems to be having problems, (continued)
- Re: grub-probe seems to be having problems, Vladimir 'φ-coder/phcoder' Serbinenko, 2012/03/08
- Re: grub-probe seems to be having problems, Lennart Sorensen, 2012/03/09
- Re: grub-probe seems to be having problems, Lennart Sorensen, 2012/03/09
- Re: grub-probe seems to be having problems, Lennart Sorensen, 2012/03/09
- Re: grub-probe seems to be having problems, Vladimir 'φ-coder/phcoder' Serbinenko, 2012/03/09
- Message not available
- Re: grub-probe seems to be having problems, Vladimir 'φ-coder/phcoder' Serbinenko, 2012/03/09
- Re: grub-probe seems to be having problems,
Lennart Sorensen <=
- Re: grub-probe seems to be having problems, Lennart Sorensen, 2012/03/09
- Re: grub-probe seems to be having problems, Lennart Sorensen, 2012/03/19
- Re: grub-probe seems to be having problems, Vladimir 'φ-coder/phcoder' Serbinenko, 2012/03/20
- Re: grub-probe seems to be having problems, Lennart Sorensen, 2012/03/20
- Re: grub-probe seems to be having problems, Vladimir 'φ-coder/phcoder' Serbinenko, 2012/03/20
- Re: grub-probe seems to be having problems, Lennart Sorensen, 2012/03/20
- Re: grub-probe seems to be having problems, Lennart Sorensen, 2012/03/20
- Re: grub-probe seems to be having problems, Lennart Sorensen, 2012/03/20
- Re: grub-probe seems to be having problems, Lennart Sorensen, 2012/03/20
- Re: grub-probe seems to be having problems, Vladimir 'φ-coder/phcoder' Serbinenko, 2012/03/08