On Tue, 26 Jun 2012 15:57:21 +0200 "Stefan G. Weichinger" <lists@xxxxxxxx> wrote: > > Greets, > > I currently try to re-add 2 disks to a RAID6 array. > > There were 4 disks in a Fujitsu Q800 NAS, the RAID6 was done via WebGUI. > > 2 disks have been removed from the array and I am not able to re-add the > old disks or add new disks via WebGUI. > > The support told me to "re-insert disks, if it doesn't work, rebuild > array" ... cool. What do I need a RAID for then ?? > > Anway. > > Entered hacking mode ;-) at least in my terms. > > sshed into box. > > To get it short: > > Currently the RAID6 array /dev/md0 is: > > md0 : active raid6 sdc3[2] sdd3[3] > 3903891200 blocks level 6, 64k chunk, algorithm 2 [4/2] [__UU] > > So I would like to re-add sda3 and sdb3 ... > > I get: > > # mdadm /dev/md0 -a /dev/sda3 > mdadm: /dev/sda3 not large enough to join array > > oops! > > But the comparison shows: > > [~] # fdisk -l /dev/sda > > Disk /dev/sda: 2000.3 GB, 2000398934016 bytes > 255 heads, 63 sectors/track, 243201 cylinders > Units = cylinders of 16065 * 512 = 8225280 bytes > > Device Boot Start End Blocks Id System > /dev/sda1 1 66 530125 83 Linux > /dev/sda2 67 132 530142 83 Linux > /dev/sda3 133 243138 1951945693 83 Linux > /dev/sda4 243139 243200 498012 83 Linux > > [~] # fdisk -l /dev/sdc > > Disk /dev/sdc: 2000.3 GB, 2000398934016 bytes > 255 heads, 63 sectors/track, 243201 cylinders > Units = cylinders of 16065 * 512 = 8225280 bytes > > Device Boot Start End Blocks Id System > /dev/sdc1 1 66 530125 83 Linux > /dev/sdc2 67 132 530142 83 Linux > /dev/sdc3 133 243138 1951945693 83 Linux > /dev/sdc4 243139 243200 498012 83 Linux > > -> identical partitions > > --- > > Could that relate to this issue: > > http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=500309 Nope. It was an earlier bug fixed in 2.6.5 by http://neil.brown.name/git?p=mdadm;a=commitdiff;h=7a3be72fc621b4a7589e923cf065 > > The NAS seems to run some ubuntu: > > # cat /proc/version > Linux version 2.6.33.2 (root@NasX86-5) (gcc version 4.1.3 20070929 > (prerelease) (Ubuntu 4.1.2-16ubuntu2)) #1 SMP Mon Sep 13 04:28:32 CST 2010 Does the "X86" in there suggest and x86 processor? What does "uname -a" show? > > and brings an older mdadm: > > # mdadm --version > mdadm - v2.6.3 - 20th August 2007 > > > If that is the issue, is there a way to use some newer binary (magically > transferred to me by mail or URL ;-) ) of mdadm to re-add disks? You mean the NAS didn't come with a complete build environment and sources for all programs? Outrageous. If you have a machine with the same arch at the NAS, you could git clone git://neil.brown.name/mdadm -b mdadm-2.6.5 cd mdadm make mdadm.static CWFLAGS=-Wall and then use the "mdadm.static" on the NAS. NeilBrown > > I would really really like to avoid to rebuild that array ... > > Thanks in advance, looking forward to your hints, Stefan! > -- > 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
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