Hi all.
I'm posting the following so that it gets into the archives, just in case some one runs into the same raid situation which I asked about a couple of days ago.
I'm all set now (smile).
This will probably ring a bell for Kirk too (smile).
Greg
----- Forwarded message from Jakob Oestergaard <jakob at unthought.net> -----
Date: Fri, 8 Nov 2002 11:09:55 +0100
From: Jakob Oestergaard <jakob@xxxxxxxxxxxxx>
To: Gregory Nowak <greg at romuald.net.eu.org>
Subject: Re: adding a drive to linear raid
On Thu, Nov 07, 2002 at 01:17:38PM -0600, Gregory Nowak wrote:
> Dear Mr. OEstergaard.
>
> Thanks to your fairly well written straight-to-the-point software raid HOWTO, I have recently successfully setup linear raid on my system with the 2.4.19 kernel.
Thank you :)
>
> I am writing to you directly, since your HOWTO doesn't seem to contain information on how one can subscribe to the linux-raid list, or where one can go to view the archives.
The list address is linux-raid at vger.kernel.org
You will find information about it from www.kernel.org (somewhere)
>
> When setting up my raid, I originally made hda2 and hdb2 into the md0 device, with my system temporarily stored on hde2.
>
> After successfully transferring the system over to md0 from hde2, I now would like to add hde2 to be a part of md0.
>
> I have marked the hde2 partition as type FD, and have modified my /etc/raidtab.
> However, when I boot, I get the following.
>
>
> md: linear personality registered as nr 1
> md: md driver 0.90.0 MAX_MD_DEVS=256, MD_SB_DISKS=27
> md: Autodetecting RAID arrays.
> [events: 00000044]
> [events: 00000044]
> [events: 00000000]
> md: invalid raid superblock magic on hde2
> md: hde2 has invalid sb, not importing!
> md: could not import hde2!
> md: autorun ...
> md: considering hdb2 ...
> md: adding hdb2 ...
> md: adding hda2 ...
> md: created md0
> md: bind<hda2,1>
> md: bind<hdb2,2>
> md: running: <hdb2><hda2>
> md: hdb2's event counter: 00000044
> md: hda2's event counter: 00000044
> md0: max total readahead window set to 124k
> md0: 1 data-disks, max readahead per data-disk: 124k
> md: updating md0 RAID superblock on device
> md: hdb2 [events: 00000045]<6>(write) hdb2's sb offset: 9743296
> md: hda2 [events: 00000045]<6>(write) hda2's sb offset: 6201024
> md: ... autorun DONE.
>
>
> I was told by someone that it is possible to add new partitions to an existing linear raid, but he has forgotten how it is done.
You need to "mkraid -f" the array again, with the new raidtab.
Don't worry, it will not destroy your data, if you are running linear
mode.
>
> I would greatly appreciate it if you could please tell me how to do this, or point me to where I can find this information.
You probably need to boot from a rescue disk (you must umount the
filesystem on the array in order to re-create it).
Then you can mkraid -f the array, with the new raidtab.
After that, run resize2fs, to actually re-size the filesystem
(otherwise, you will have the original sized filesystem on a larger
array, which will not give you any more space on the filesystem).
Now, reboot, knock-the-wood, cross fingers, things should come up just
fine :)
--
................................................................
: jakob at unthought.net : And I see the elder races, :
:.........................: putrid forms of man :
: Jakob ?stergaard : See him rise and claim the earth, :
: OZ9ABN : his downfall is at hand. :
:.........................:............{Konkhra}...............:
----- End forwarded message -----
