topic Re: Backup of RAW disks in Operating System - HP-UX

Backup of RAW disks

Steve Massey_1 — Tue, 16 May 2000 09:32:57 GMT

I have some disks directly interfaced by informix (raw)

These are backed up using ADSM, what I want to back them up manually.

What will work ?? ie I don't think fbackup will work on unmounted F/S

Thanks in advance

Steve

Re: Backup of RAW disks

Andreas Voss — Tue, 16 May 2000 11:00:24 GMT

Hi,

to backup a raw disk i would use the dd command e. g.:
dd if=/dev/rdsk/cXtYd0 of=/dev/rmt/0m bs=64k
where X is the Hardware instance, Y the scsi address of your disk and /dev/rmt/0m the default tape device if you have a DDS-Drive.
If you are using log. volumes you have to
use if=/dev/vgXX/rlvolY
where XX is the volume group number and Y the log. volume number

Greetings

Andrew

Re: Backup of RAW disks

Richard Marshall — Tue, 16 May 2000 16:25:28 GMT

We use the Raw Disk backup feature of OmniBack, but the dd command does the same thing. The only problem with raw disk backup is the amount of time it takes to complete.

Re: Backup of RAW disks

Dave Wherry — Tue, 16 May 2000 18:57:24 GMT

What do you want to do with this manual backup? Do you think you will ever need to restore from it? If you do a dd, besides being slow, it means you will have to restore everything on that dd. You will not be able to be selective.
If you have one table that is corrupted and you only need to restore that table, you need to use some other utility like Omniback or ADSM. I've never used ADSM so I do not know if it can restore individual objects. dd will not.

Re: Backup of RAW disks

Venu_2 — Wed, 17 May 2000 08:39:59 GMT

Hi,

Do you have Omniback?

Try it...

regards
venu