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Operating System - Tru64 Unix
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Backing up in 5.1A

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Occasional Contributor

Backing up in 5.1A

I have True64UNIX 5.1A and i doing backups of root filesistem (ADVFS) by vdump (in multiuser mode), I read documentation to 5.1B and treke is "strictly recommanded" making backups in single user mode. In documentation for 5.1A is it not. Are this backups maked in multiuser mode usable or not ? Can it makes any errors unrecaverable with "verify" ?
Ivan Ferreira
Honored Contributor

Re: Backing up in 5.1A

As we provice 7x24 services, we cannot take down the servers for a full backup. We always do in multi user mode. We where able to recover the server from this backup. I cannot warranty that will always work, but as we do full operating system backups every day, one of these backups should be able to recover the system. This is my experience.

TruCluster backups are also done in multi user mode.

Por que hacerlo dificil si es posible hacerlo facil? - Why do it the hard way, when you can do it the easy way?

Re: Backing up in 5.1A

Same here, we are making vdump in multi-users mode and we've been able to vrestore a system wuthout any problem (happens only one time, then not sure that it'll ever work).
Joris Denayer
Respected Contributor

Re: Backing up in 5.1A

If you want to make a AdvFS rootfilesystem backup in multi-user.

- wait for a quiet moment in the production
- sync multiple times and create a clone filesystem with the clonefset command.
- mount the clone fileset and make your backup.
- umount clone fileset and remove it with the rmfset command.

Same can be done for /usr

This will give you the highest "quality" of backup in multi-user mode.

Good Luck
To err is human, but to really faul things up requires a computer