Auditing the Library

How Audit Works

An audit ejects duplicate and invalid volumes. The cartridges have:

An external label that duplicates one already scanned.
A missing or unreadable external label and no virtual label.
An invalid media type.
An invalid volume ID.

ACSLS records any database changes from the audit in the Event Log, and also displays cmd_proc messages during the audit. Audits only apply to LSM storage cells, not to tape drives or CAPs. For information about running an audit, see audit.

When to Run an Audit

You run an audit to:

Create volume information in the database for newly configured libraries.
Add volumes to the database when the cartridges were not entered through the CAP.

Example: You added an LSM to your library, opened the LSM door, and manually added cartridges to the LSM.
Resolve discrepancies between the library and the database.

Example: Run an audit if you opened an LSM door and manually removed cartridges instead of ejecting them through the CAP. The audit either marks the volume absent or deletes the removed volumes from the database.

Audit an SL3000 after it is configured or reconfigured to ACSLS. The library reports the potential cell locations that are not accessible to ACSLS when ACSLS audits it. Inaccessible cell locations include:

locations where CAPs, drives, and operator panels are installed.
cell locations that the robots cannot access.
cell locations that are not activated.
cell locations that are not in this partition.

Audit Intervals

Audit intervals depend on several factors, including: your ACSLS configuration; whether the library is reporting cell contents from its database or by examining each cell; your library configuration; the number of database changes required; and the scope of the audit. The following table describes how the differences in the scope of an audit affect the audit intervals.

Table 7-1 How the Scope of an Audit Affects the Audit Interval

This audit takes less time	Than this audit
A diagnostic ACS/LSM	An online ACS/LSM
An ACS/LSM dedicated to the audit	An ACS/LSM processing other requests
A full panel	A (partially or completely) empty panel
A drive panel	A standard panel
An inside panel	An outside panel

In addition, consider the LSM type for the component you audit. The average audit time for an SL8500 or SL3000 LSM is five minutes (if the SL8500 physical audit completes before the ACSLS audit).