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Re: Problems installing BRUB with RAID5

Damon L. Chesser wrote:
> Damon L. Chesser wrote:
> >Chris Willard wrote:
> >>Hi All,
> >>
> >>I have a pc with 3x40GB IDE drives.
> >>
> >>I have 2 RAID 5 devices setup-
> >>
> >>/dev/md0 = 3 x 38GB as /
> >>/dev/md1 = 3 x 2GB as SWAP
> >>
> >>Debian base installs OK but when I get to the Grub installation I get a
> >>"Fatal Error" message.
> >>
> >>I am telling Grub to install on /dev/md0 but it won't install.
> >>
> >>Any tips would be appreciated.
> >>
> >>Regards,
> >>
> >>Chris
> >>
> >>
> >>  
> >Chris,
> >
> >AFAIK, grub can only be set up on a raid0 or a raid1 device.  So far, 
> >I can not document this, but I seem to recall that fact.  As others 
> >said, you need to install grub on REAL devices.  You can see 
> >www.damtek.com for a (I hope rather thorough) walk through on how to 
> >set up grub on a raid.
> >
> Just adding more info on the on the raid0 and raid1 and grub.  I have 
> just remembered where I got that info from.  RHEL-4 will only let you 
> select raid0 or raid1 for the /boot partition, or for / if /boot is not 
> a separate partition during install.  I suspect this is a RHEL issue and 
> not a grub issue, but truly, I don't know.  I just did not want to be 
> putting out bad info, so I thought I would expand on why I thought only 
> raid0 and raid1 would work for grub.
> Since I can't find any documentation on the limits of raid and grub, I 
> suspect you can run raid5.  Anybody willing to confirm this for me?
> -- 
> Damon L. Chesser
> damon@damtek.com
> damon@okfairtax.org

My experience with raid5 was that grub cannot be installed on it.   
I had to setup grub on each drive in my mirror separatel.  I ended up setting up
a small /boot then setting up grub on each disk in the mirror.  If I recall
correctly, grub was installed on /dev/hda only, so I ran setup on /dev/hdb etc...

just from my own experience, I'm no expert.

scott lair

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