Replacing disk in Linux Software RAID 1
jludwig
wralphie at comcast.net
Wed Aug 18 13:35:43 UTC 2004
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>
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