Replacing disk in Linux Software RAID 1

[Robin Laing]

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