[ale] Software RAID1 rebuild after HDD failure (How to do?)

[Christopher Fowler]

Mine is a batch file that I use with grub to restore the system.  I have
restore CDs that can take the system back to FC2 + our software in 10
minutes.

On Mon, 2006-07-03 at 10:43, Ryan Fish wrote:
> Is there any difference is doing what you show below and just using
> "grub-install /dev/hdc3" as Geoffrey suggested?
> 
> Also, grub.conf is in both /boot/grub and /etc on the box in question.  I'm
> assuming it should be in both on the replacement drive as well.
> 
> Since the raidhotadd syncs everything from hda to hdc wouldn't GRUB
> technically be installed at that point anyway?
> 
> Thank you.
> -Ryan
> 
> 
> -----Original Message-----
> From: Christopher Fowler [mailto:cfowler at outpostsentinel.com] 
> Sent: Monday, July 03, 2006 10:15 AM
> To: FishR at bellsouth.net; Atlanta Linux Enthusiasts
> Subject: Re: [ale] Software RAID1 rebuild after HDD failure (How to do?)
> 
> Run grub in batch mode
> 
> [cfowler at cfowler RESCUE]$ cat iso/data/grub.conf 
> root (hd0,0)
> setup (hd0)
> root (hd1,0)
> setup (hd1)
> 
> Or use the commands above.  Your root would be hd0,2 and hd1,2
> 
> 
> On Mon, 2006-07-03 at 10:10, Ryan Fish wrote:
> > How would I go about installing GRUB on the second drive?  Can I just use
> an
> > rpm and somehow force it to install on hdc3 (where / lives)?
> > 
> > Thank you.
> > -Ryan
> > 
> > -----Original Message-----
> > From: ale-bounces at ale.org [mailto:ale-bounces at ale.org] On Behalf Of
> > Christopher Fowler
> > Sent: Sunday, July 02, 2006 6:57 PM
> > To: Atlanta Linux Enthusiasts
> > Subject: Re: [ale] Software RAID1 rebuild after HDD failure (How to do?)
> > 
> > On Sat, 2006-07-01 at 02:57 -0400, Jim Popovitch wrote:
> > > An alternative way to test is to d/l VMWare server (it's free, but
> > > still 
> > > pre-release status) and install it on your desktop/laptop.  Then
> > > connect 
> > > to it from the same system (or another one) and create a virtual 
> > > machine.  Edit the virtual machine's settings to give it two drives, 
> > > then install CentOS or whatever distro is at the remote site.  Set it
> > > up 
> > > with full raid working, then shutdown the virtual machine and remove
> > > one 
> > > of the drives from the config.  Then add a new (third) drive, and use
> > > it 
> > > as instead of the removed one.  Assuming that you have the time to do 
> > > this. ;-)
> > 
> > I did this on a real test machine and then had to lookup commands to
> > make it work again.  One thing I did learn was to make sure I installed
> > grub onto both drives.  If the first one failed then the 2nd would not
> > boot unless grub was installed.
> > 
> > My biggest problem was rebuild.  If the machine rebooted many times
> > during a rebuild eventually all data was lost and a reformat was
> > required.
> > 
> > 
> > 
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> > 
> > 
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>