micromanual for nsradmin

Join hundreds of others and download the NetWorker Power User's micromanual for nsradmin. Check this blog article for details.

Enterprise Systems Backup and Recovery

If you have an interest in, or work in data protection/backup and recovery environments, you should check out my book, Enterprise Systems Backup and Recovery: A Corporate Insurance Policy. Designed for system administrators and managers alike, it focuses on features, policies, procedures and the human element to ensuring that your company has a suitable and working backup system.

 

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Archives

ADV_FILE devices and tape rotation strategies

While I touched on this in the second blog posting I made (Instantiating Savesets), it’s worthwhile revisiting this topic more directly.

Using ADV_FILE devices can play havoc with conventional tape rotation strategies; if you aren’t aware of these implications, it could cause operational challenges when it comes time to do recovery from tape. Let’s look at [...]

Basics - Need a different volume from pool ...

The scenario:

A clone or stage operation has aborted (or otherwise failed)
It has been restarted
It hangs waiting for a new volume even though there’s a partially written volume available.

This is a relatively easy problem to explain. Let’s first look at the log messages that happens. To generate this error, I started cloning some data to the [...]

Quibbles – Why can't you clone or stage incomplete savesets?

NetWorker has an irritating quirk where it doesn’t allow you to clone or stage incomplete savesets. I can understand the rationale behind it – it’s not completely usable data, but that rationale is wrong.

If you don’t think this is the case, all you have to do to test is start a backup, cancel it mid-way [...]

You can't escape cloning with cross-site backups

Periodically someone will tell me that they don’t need to clone because they run cross-site backups. I.e., they’ll have an architecture such as the following:

Sample cross site backup configuration

Looking at a tape-only environment for simplicity, this configuration sees the backup media immediately off-sited by virtue of the tape library being physically located in another [...]