[WBEL-users] Adding bootable flag to running Array

Tue, 06 Jul 2004 12:58:35 +0200

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Hi,
well actually I have grub installed in the MBR on the original disk. I know 
that if the "master" disk breaks I cannot boot from the new disk (I tried 
this before), so I have to start with the cd in rescue mode and run 
/sbin/grub to do

grub> root (hd0,0)
grub> setup (hd0)
grub> quit

Don't know if this is enough or if I need the flag.

Imagine I decide to shut down the machine, take out the disk (so the raid 
is not running on it) put it in a different box, start with a rescue disk 
and add the flag on the first partition, then put it back in and start the 
Samba server, anyone knows if this would compromise the other partitions or 
in any way the RAID and in the end my precious server?  ;-)

Meanwhile I'll see if I can get another test machine and try different things.

Thanks for your help, have a nice day
Simone

At 12:25 06/07/2004, Ewan Mac Mahon wrote:
>On Mon, Jul 05, 2004 at 03:45:26PM +0200, Simone wrote:
> > Hi,
> > looking for advice on the safest and quickest way to add the bootable flag
> > to a running Array. Last week we had to replace a disk on the samba server
> > and reconstruct the array (RAID1, 2 disks, $ partition each disk). My
> > fault, I forgot to add the bootable flag on the /boot partition.
>
> > As usual, any comment really appreciated.
>
>Do you actually need the bootable flag for anything? Linux bootloaders
>tend to work out where to boot from using a config file, so if you've
>got grub (or lilo?) installed in the MBR it won't matter.
>
>Ewan

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Hi, 
well actually I have grub installed in the MBR on the original disk. I
know that if the &quot;master&quot; disk breaks I cannot boot from the
new disk (I tried this before), so I have to start with the cd in rescue
mode and run /sbin/grub to do 
grub&gt; root (hd0,0) 
grub&gt; setup (hd0) 
grub&gt; quit 
Don't know if this is enough or if I need the flag.&nbsp; 
Imagine I decide to shut down the machine, take out the disk (so the raid
is not running on it) put it in a different box, start with a rescue disk
and add the flag on the first partition, then put it back in and start
the Samba server, anyone knows if this would compromise the other
partitions or in any way the RAID and in the end my precious
server?&nbsp; ;-) 
Meanwhile I'll see if I can get another test machine and try different
things. 
Thanks for your help, have a nice day 
Simone 
 
At 12:25 06/07/2004, Ewan Mac Mahon wrote: 
<blockquote type=cite class=cite cite="">On Mon, Jul 05, 2004 at
03:45:26PM +0200, Simone wrote: 
&gt; Hi, 
&gt; looking for advice on the safest and quickest way to add the
bootable flag 
&gt; to a running Array. Last week we had to replace a disk on the samba
server 
&gt; and reconstruct the array (RAID1, 2 disks, $ partition each disk).
My 
&gt; fault, I forgot to add the bootable flag on the /boot
partition. 
&gt; As usual, any comment really appreciated. 
Do you actually need the bootable flag for anything? Linux
bootloaders 
tend to work out where to boot from using a config file, so if
you've 
got grub (or lilo?) installed in the MBR it won't matter. 
Ewan 
</blockquote> 
 
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