topic Re: Raw Device backup on mounted filesystem in Operating System - HP-UX

Raw Device backup on mounted filesystem

samboom71 — Wed, 01 Apr 2009 14:03:17 GMT

Hi all,
I would like to know if there is a way to do an image backup of a mounted filesystem, knowing that it will be inconsistent and then use another backup utility to read this image and do the correction of the corrupted files?

HP UX 11.11
Data Protector 5.5

Regards,

Re: Raw Device backup on mounted filesystem

Steven E. Protter — Wed, 01 Apr 2009 14:07:27 GMT

Shalom,

In general, the application using the raw disk area has a utility for backing up the data to a regular file system or tape.

For example, Oracle ships with rman, DP has a module for backing up oracle databases. These utilities can do what you want.

To provide more specific help, you will need to tell us what application is using the raw disk area.

SEP

Re: Raw Device backup on mounted filesystem

Eric Antunes — Wed, 01 Apr 2009 14:11:18 GMT

Hi,

If it is an Oracle database, you will always need to start with a consistent cold (cp, tar, fbackup, DP, etc...) or hot (RMAN) backup to restore your database. Then, if you are in archivelog mode and have those archivelogs in the appropriate fs directory (parameter log_archive_dest) you can recover to a specific date/time.

Eric

Re: Raw Device backup on mounted filesystem

Ganesan R — Wed, 01 Apr 2009 14:11:45 GMT

Hi,

Not clear about your requirement. If it is a mounted filesystem, you can use tar to take the image bakcup.

#tar cvf /tmp/imagefile.tar /

Re: Raw Device backup on mounted filesystem

samboom71 — Wed, 01 Apr 2009 14:45:54 GMT

Hi there,
in fact, it's a huge filesystem which is in the production (Not Oracle files), I want to take a hot image (mounted) of it and find a way to repair the inconsistency. I hope you've got my point.

thanx

Re: Raw Device backup on mounted filesystem

Volker Borowski — Fri, 03 Apr 2009 20:07:53 GMT

No, I think it will not work this way.

You can consider to mount a snapshot and
backup the snapshot instead of the real filesystem.

Volker