FC5 weird raid issues

[Jarod Wilson]

On Sunday 26 March 2006 18:35, Dax Kelson wrote:
> On Sun, 26 Mar 2006 11:51:58 +0200 "dragoran" wrote:
> >I just deleted the raid and recreated it and now it seems to work fine.
> >(running FC5 with md raid now).
> >But the bug still needs to be fixed.
> >But I don't like to reinstall FC6 when its out upgrade from raid should
> >work as it did before FC5.
>
> Are you using or have you ever used 'motherboard RAID' on the hard drive
> you are installing to?
>
> The reason I ask is because, new with FC5, if fake motherboard RAID
> metadata is detected then dmraid is automatically activated and the
> underlying physical partitions are 'hidden' so as to (properly) prevent
> accidental direct writes to part of the RAID.

And this gets REALLY fun if you have a drive or two that you forgot was at one 
time used as part of a fake raid on one board with one type of controller, 
then try to set it up as part of a fake raid on a different board with a 
different type of controller, since there doesn't seem to be any easy way to 
get the metadata out of there, short of putting the drive(s) back on the old 
controller to destroy the raid.

Otherwise, you wind up with multiple fake raid metadata formats on the drive, 
and dmraid doesn't know which one to use (in my case, I wound up with both 
nvidia and sil metadata on some drives, and the kernel kept trying to use the 
wrong metadata).

Not to mention that fake raid10 doesn't quite work yet... :)

Ah yes, and if you want the metadata to be ignored altogether at install time, 
just pass 'nodmraid' as a boot option. Certainly better to get the fake raid 
metadata off though, if possible.

-- 
Jarod Wilson
jarod at wilsonet.com
-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: application/pgp-signature
Size: 191 bytes
Desc: not available
Url : http://lists.fedoraproject.org/pipermail/devel/attachments/20060327/c1d0a12c/attachment-0002.bin