Replacing disk in Linux Software RAID 1

[jludwig]

On Tue, 2004-08-17 at 11:26, Robin Laing wrote:
> Michael Mansour wrote:
> > Hi Robin,
> > 
> > Yahoo truncated most of the email so I'll just try to
> > answer your specific question.
> > 
> > 
> >>Would it be possible to write the MBR to the second
> >>disk just in case?
> >>-- 
> >>Robin Laing
> > 
> > 
> > Yes, I've tested this by removing the first drive and
> > writing grub to the MBR of the second drive and it did
> > work fine, although when putting the first drive back
> > in there then I had the issue with two MBR's which got
> > things a little confused.
> > 
> > Basically, what I learnt from that saga is that grub
> > should only reside on one drive.
> > 
> > Michael.
> > 
> > 
> > Find local movie times and trailers on Yahoo! Movies.
> > http://au.movies.yahoo.com
> > 
> > 
> 
> This is interesting.
> 
> I don't use RAID for my system drives but I do for /home so it isn't 
> an issue for me.  But in a production system, it would be very 
> convenient to have the MBR on both drives in case the boot drive does 
> fail.  Move the second drive and then you can reboot.
> 
> I for one when I was a system admin, did not like getting called in at 
> 03:00 due to a crash.  And doesn't always seem to happen at 03:00 when 
> things go bad?  :)
> 
> I feel it should be there.  Now if you do write it to the second disk 
> and you have problems, this could be a problem.
> 
> -- 
> Robin Laing
Many newer BIOS' will allow for booting off of a secondary drive.

If this is the case with your machine I would just load the second drive
where it sits and just change the BIOS setting if necessary.

(I used to do this with SCSI and IDE for a duel boot system.)

-- 
jludwig <wralphie at comcast.net>