Legato NetWorker ClientPak and Storage Node Installation Guide

Chapter 3: Configuration

• If you do not need the data on the full volume, you can manually change the

mode to “recyc” in the Volumes resource. NetWorker overwrites the data with

new backups, but maintains the existing labels. This is the only instance in which

you do not need to relabel a volume to make it eligible to be overwritten with new

data.

The mode of a volume is automatically changed to recyclable when all the save sets on

the volume have passed the time period specified by its retention policy.

There are advantages to both recycling media and adding more media to a pool. By

recycling, you reuse the same volumes and do not add new volumes to the pool.

However, the media may wear out over time and have a higher failure rate.

On the other hand, if your site requires that you maintain the backups in storage for a

certain period of time, then you might have to add more media to the volume pool

instead of recycling it. For example, an autochanger might need new volumes every

three months if your company policy is to maintain the backups for a year. In this case,

you have to keep adding new media to the pool until you can recycle the volumes that

contain expired or old backups.

Using Pools with an Autochanger

If you plan to have full and nonfull backups, we recommend that you estimate the

number of volumes needed for your full backups and assign them to the Full pool. This

ensures that your full backups are in a consecutive range of slots in the autochanger,

which makes it easy for you to remove all the volumes at the same time.

Calibrating the Devices

Check the autochanger manufacturer’s documentation for information about the

frequency and method for calibrating the loading mechanism for the autochanger

device.

Moving Media

Always use NetWorker to move the media inside an autochanger. If you physically

move the media, the autochanger inventory becomes outdated. If this occurs

inadvertently, follow these steps:

1. Reset the autochanger:

: NSRJB;info=”-H”

2. Inventory the autochanger contents:

: NSRJB;info=”-I -E”

Refer to “Appendix B: Command Line Reference” in the Legato NetWorker

Administrator’s Guide, UNIX Version, and the nsrjb man page for details on the NSRJB

program.