Hey Tim,
Found this during my evening reading! http://www.dur.ac.uk/a.d.stribblehill/mirrored_grub.html
"The purpose of this document is to suggest a way of configuring grub on a system where the operating system is mirrored between two disks, so that if the first disk fails completely, the system will boot automatically from the second disk."
Hope this helps!
Seb.
-----Original Message----- From: centos-bounces@centos.org [mailto:centos-bounces@centos.org] On Behalf Of TimJowers@Yahoo.Com Sent: Thursday, 14 September 2006 10:49 PM To: CentOS mailing list Subject: Re: [CentOS] backup server..
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@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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