[CentOS] backup server..

Thu Sep 14 13:02:27 UTC 2006
Brett Serkez <bserkez at gmail.com>

The known issue and manual setup of the MBR on the second drive during
install that I described in my previous post works seamlessly for me.
I do however usually setup GRUB in the boot partition, that is during
install I check off advanced boot load options and change the GRUB
location from /dev/hd? to /dev/hd?x (i.e., /dev/hda -> /dev/hda1).
Presumably, this drops in a 'standard MBR' that just looks for the
active partition and transfers control.

I've not had the issue you describe, when I've had a master drive has
fail, my systems seamlessly boots off the second drive.


On 9/14/06, TimJowers at Yahoo.Com <timjowers at yahoo.com> wrote:
>    Maybe someone can clear up the grub conf for me. Has anyone gotten this to
> work: two IDE/ATA drivers. Slave is a spare duplicate of the master. Goal is to
> be able to boot to Spare at any time and run it instead. What step am I
> missing?
>    When I tried to duplicate a system I failed using this method due to the
> /boot configuration being specific to the disk layout in the box. That is, if I
> copied disk A to disk B and then wanted to boot to B I believe I would have to
> remove A and strap B as the master. Combined SCSI and ATA totally failed on
> GRUB knowing which disk is which.  Ended up having to first install the target
> slave disk and then moved the disk. Copied everything except /boot.
>    My impression is RAID is the only thing which would work. My goal was
> actually to create several systems based on the install of one master system.
> The other systems had random numbers of disks and such. The only way i got it
> to work was Ch1Master had to be the boot disk in all of them. I mucked around
> with
> /boot/grub/grub.conf and device.map to no avail.
> Thanks,
> TimJowers
> --- Sebastien Tremblay <sebastien.tremblay at au.cmpmedica.com> wrote:
> > Hi,
> >
> > I've been playing with CentOS quite a bit lately (and I must say it's
> > growing on me!! :) and I was now able to convince my boss that we could
> > get a box and gradually start migrating our hosting from win2k3 to
> > centos.
> >
> > So anyway, I've got a new box at the colo ready up and running - P4 3Ghz
> > w/HT 2Ghz RAM 2x70Gb HDD, running Centos4.4 fully up-to-date. Now my two
> > questions are;
> >
> > (1.) In terms of backup, I'd like to have a cron sending out an nightly
> > incremental backup of user files. I'd also like to have HDA to be copied
> > backed up entirely (maybe weekly) onto HDB (were're not going to use
> > 140GB anyway!) so that is hda crashes, I`d swap both of the hdds and
> > boot from the backup. Now for that second step, I was reading that dd
> > was quite CPU intensive? Would there be other alternatives? Advices on
> > doing backups?
> >
> > (2.) I've got no physical access to the box, and the box has obviously
> > no video or sound. Considering this, would it possible to remotely
> > administer the box using VNC in a GUI environment? - I figured 2Ghz
> > could probably handle me starting x sometimes...! So if possible.. How
> > would I do it? I`m assuming there are no `yum install x`....
> >
> > Anyway.. Thanks for any input you may have on the both topics!
> >
> > Cheers,
> >
> > Seb.
> >
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