Re: is my raid1 array really working??

[harland christofferson <debian-user@audubonstrings.com>]

Okay ... will look into my MBR on drive 1.

something i thought i'd check /etc/fstab ... does it
matter that my mount points look like:

# cat /etc/fstab
# /etc/fstab: static file system information.
#
# <file system> <mount point>   <type>  <options>     
 <dump>  <pass>
proc            /proc           proc    defaults      
 0       0
/dev/hda1       /               ext3   
defaults,errors=remount-ro 0       1
/dev/hda9       /home           ext3    defaults      
 0       2
/dev/hda8       /tmp            ext3    defaults      
 0       2
/dev/hda5       /usr            ext3    defaults      
 0       2
/dev/hda6       /var            ext3    defaults      
 0       2
/dev/hda7       none            swap    sw            
 0       0
/dev/fd0        /media/floppy0  auto    rw,user,noauto
 0       0


and don't reference the /dev/mdX ?
--- "Douglas A. Tutty" <dtutty@porchlight.ca> wrote:

> On Tue, Sep 18, 2007 at 05:10:53PM -0700, harland
> christofferson wrote:
> > It looks like they are working ... mdadm -D device
> > returns similar for all:
> > 
> > /dev/md5:
> >      Raid Level : raid1
> >    Raid Devices : 2
> >   Total Devices : 2
> >           State : active
> >  Active Devices : 2
> > Working Devices : 2
> >  Failed Devices : 0
> >   Spare Devices : 0
> > 
> >     Number   Major   Minor   RaidDevice State
> >        0       3        9        0      active
> sync  
> 
> Yup.
> 
> If ever you want the practice, immediatly after a
> full backup,
> shutdown, pull the plugs on one drive, then reboot.
> 
> You'll see that the system still works.  You can
> re-read the man pages
> to see how you'll add the drive back in.  Just
> consider it a new drive.
> Shutdown, reconnect the drive, reboot, and add this
> 'new' disk to the
> array.  Then watch it sync.
> 
> The only other tweak:  Assuming that you have /boot
> (either on its own
> or part of /) on raid1, I would suggest you put in
> lines in grub's
> menu.list that point to the other disk.  Grub
> automatically only points
> to the first disk of the array.  If the first disk
> dies and: 1) you only
> have grub installed in the first drive's MBR, or 2)
> you don't have
> entries for booting off the second drive, you'll
> have a booting problem.
> 
> So put entries for both drives in grub's menu list,
> and install grub
> onto both MBRs.  Then retest that you can boot OK
> with either disk
> disconnected.
> 
> Doug.
> 
> 
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