On Wed, 2004-08-18 at 10:19, Robin Laing wrote: > jludwig wrote: > > On Tue, 2004-08-17 at 11:26, Robin Laing wrote: > > > >>Michael Mansour wrote: > >> > >>>Hi Robin, > >>> > >>> > >>>>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. > >>> > >> > >>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.) > > > > This isn't the issue. > > As stated by Michael, having Grub on the second drive caused problems. > My point was in a situation where your /boot is actually part of a > Raid array, and the second drive "cannot have Grub on it" then it > isn't much use in an emergency as you will have to have a copy of the > MBR to update your second drive. > > Is this an issue with RAID or Grub or the Bios? > > -- > Robin Laing If I remember correctly grub can be on both and chain loaded, but, if your first drive has issues and can't start grub you're dead. -- jludwig <wralphie@xxxxxxxxxxx>
