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Re: [PLUG] How to break a software RAID mirror?
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Rather than unplug the disk, it's easier just to fail it using mdadm
and tell the array that it is gone.
That said, the array will bitch that it's missing a disk - You can't
run RAID-1 with only a single disk.
Not really sure what is trying to be accomplished here, other than
using sdb for something else - it's not as if there isn't a load of
unused disk space available.
Brian Stempin wrote:
The only raid0 set that I see is /dev/md1. I don't see
that volume mounted anywhere. Everything else is a raid0, so those
volumes are nothing to worry about. For the sake of testing, I would
recommend shutting down the machine, unplugging sdb, and rebooting. If
everything seems to be in order (ie, there's no uses for /deb/md1 that
I'm unable to see), then you should be good! Then, it's just a matter
of reconfiguring the raid to not complain that sdb isn't present.
On 8/30/07, Dan Roberts <Daniel.G.Roberts@sanofi-aventis.com>
wrote:
Hello All
Thanks for the help!
I am running fedora core>>
[droberts@kayak /proc]$ uname -a ;
Linux kayak 2.6.12-1.1381_FC3smp #1 SMP Fri Oct 21 04:03:26 EDT 2005
i686 i686 i386 GNU/Linux
cat /proc/mdstat
Personalities : [raid0] [raid1]
md4 : active raid1 sdb2[1] sda2[0]
25599488 blocks [2/2] [UU]
md2 : active raid1 sdb3[1] sda3[0]
5116608 blocks [2/2] [UU]
md3 : active raid1 sdb5[1] sda5[0]
5116544 blocks [2/2] [UU]
md1 : active raid0 sdb6[1] sda6[0]
8192896 blocks 64k chunks
md5 : active raid1 sdb7[1] sda7[0]
29704064 blocks [2/2] [UU]
md0 : active raid1 sdb1[1] sda1[0]
2048192 blocks [2/2] [UU]
unused devices: <none>
[droberts@kayak /proc]$
So it seems that I am running a mix oF RAID0 and RAID1 on these two disk
RAIDED sets..
The following is how they are mounted on my system when in use..
Filesystem Size Used Avail Use% Mounted on
/dev/md0 2.0G 374M 1.5G 21% /
/dev/md5 28G 33M 27G 1% /home2
none 1004M 0 1004M 0% /dev/shm
/dev/md3 4.9G 34M 4.6G 1% /tmp
/dev/md4 25G 3.2G 20G 15% /usr
/dev/md2 4.9G 190M 4.4G 5% /var
/dev/sdc2 20G 9.8G 8.6G 54% /mnt
What would you recommend I do at this point to detach sda from sdb so
that I could use disk #2 while still having data preserved on disk#1?
Remeber that I can still boot my system on disk#3 which isn't RAIDED to
anyone..
Thanks for any advice!
Dan
___________________________________________________________________________
Philadelphia Linux Users Group -- http://www.phillylinux.org
Announcements - http://lists.phillylinux.org/mailman/listinfo/plug-announce
General Discussion -- http://lists.phillylinux.org/mailman/listinfo/plug
___________________________________________________________________________
Philadelphia Linux Users Group -- http://www.phillylinux.org
Announcements - http://lists.phillylinux.org/mailman/listinfo/plug-announce
General Discussion -- http://lists.phillylinux.org/mailman/listinfo/plug
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___________________________________________________________________________
Philadelphia Linux Users Group -- http://www.phillylinux.org
Announcements - http://lists.phillylinux.org/mailman/listinfo/plug-announce
General Discussion -- http://lists.phillylinux.org/mailman/listinfo/plug
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