LinuxSA Mailing list archives

  From: Anthony Symons <ant@sa.pracom.com.au>
  To  : Freeman, Peter (ERHS) <Freeman.Peter@saugov.sa.gov.au>
  Date: 05 Nov 2001 11:56:45 +1030

RE: Ext 3 partition imaging

Ive seen kernel panic with ghost 6 and ext 2 with later redhats. The
problem was ghost 6.03 didnt support the disklabeling, which redhat use
to locate the root partition. Workaround was boot with a rescue cd and
use e2label to label the partitions. You may be hitting this problem.

Ant.

On Mon, 2001-11-05 at 09:15, Freeman, Peter (ERHS) wrote:
> 
> >> If I understand it correctly, ext3 is just ext2 with an added file
> >> containing journaling information.  If this assumption is 
> >correct, the
> >> filesystem is identical to ext2, and should be supported by 
> >any program
> >> that supports ext2.
> >> 
> >> I would do a little research on ext3 to confirm this.
> >
> >I'm not sure if this is correct but it's not required.  You can
> >convert between EXT2 and EXT3 with a simple tune2fs command which
> >takes only a short time to run.
> >
> >So if it only supports EXT2 then you can simply:
> >1) boot onto a boot cd with tune2fs (RH7.2 has this) and convert the
> >   partitions in question to EXT2
> >3) run your Ghost program in EXT2 mode
> >4) boot onto the boot cd again and run tune2fs to convert back to EXT3 
> 
> 
> Hmmm, seems like ext3 has some sort of overhead that programs like Ghost
> don't recognise as yet.
> 
> I successfully imaged a RH7.2 machine running ext3 on all filesystems, 
> however Ghost (6.5 ent) recognised it as ext2.  When it came to booting
> the imaged PC, our good friend the kernel panicked a little when he 
> couldn't find the ext3 filesystem that it was looking for :o)
> 
> So on the face of it, imaging ext3 with Ghost isn't a plug & play scenario
> yet.  I'd imagine as Michael suggested above, that you could convert to
> ext2 before imaging, obviously you'd need to modify your boot disk and/or 
> startup files to recognize your root partition as ext2.
> 
> Symantec's KB lists ext2 as the only Unix-based filesystem that it supports
> at this stage, this includes v7 of Ghost.
> 
> Maybe some of the OSS options might be the go, such as Partimage or similar,
> I'm yet to try these out.
> 
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-- 
Systems Administrator       
Pracom Ltd.             
+61 8 82029074 -=- +61 402 100 671 
anthony.symons@sa.pracom.com.au

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