Re: backup of disk image to tape but i need some flexiblity when restoring !
From: at (R.Mariotti)
Date: 02/24/04
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Date: Tue, 24 Feb 2004 02:12:23 GMT
On Mon, 23 Feb 2004 15:05:47 +0100, "Tom Van Overbeke"
<tom.van.overbeke@pandora.be> wrote:
>Hello,
>
>
>I have a few linux servers that i want to be able to restore in no time, so
>i was thinking of dumping the entire disk contents to tape using dd.
>sth. like dd if=/dev/sda of=/dev/st0.
>
>the problem with this is: what if the disk to be restored on is different in
>size.
>
>Can i expect that if the disk is bigger, the restore would work without a
>problem ?
>
>The problem being that the servers are serviced by the manufacturer itself,
>and who nows if they decide a year from now to only provide disks of 72GB
>instead of currerntly 36GB. Would my 'dd' backup still be of any use ?
>
>other question, could i restore these tape contents to an image file, and
>mount this image file as a virtual disk ?
>
>lastly,
>are there other problems or better approaches for what i am trying to do ?
>btw, the disk is a 36GB disk, and the tape drive would be a dds4 (20/40).
>how do i get the entire disk contents to fit on one tape. is it safe to pipe
>the data through gzip before writing them to tape ?
>
>
>thx,
>
>Tom.
>
>
Tom;
My $.02 worth.
Contrary to some beliefs here my shop required the same solution as
you are asking. I tried many methods and also tries a few
backup/restore products. By far the best of them IMHO was storix
from www.storix.com.
In fact, just last Friday we experienced a corrupted superblock on one
of our servers. The tools we had could not correct this. Our option
was to restore the disk. Fortunately we had created a storix backup
just the previous week and we had the volatile directory structure
backed up on a daily backup (also using storix).
We booted from the storix created diskettes (you could also use CDROM)
which prompted for the insertion of the backup tape. Upon examination
it displayed what it found and after we accepts all the defaults it
restored the entire data to our /dev/hda. Upon completion it
rebooted and the next thing we saw was a perfectly restored system.
We have also restored images made on disks with different geometry to
different disks with storix making all the adjustment for us.
The "personal edition" designed to work on a single system with an
attached tape drive is FREE. Even if you wish to get fancy and
network your backups, the server and client costs are quite
reasonable.
Give them a look - you shouldn't be disappointed.
Bob
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