Reconfiguring ACSLS When Tape Drives are Moved, Added, or Removed

You must reconfigure ACSLS to update the drive serial numbers and drive types in the ACSLS database whenever tape drives are swapped between locations or a tape drive in the library is replaced with a different tape drive. You must reconfigure ACSLS to add or remove tape drives when they are inserted into or removed from a library. Adding tape drives to the Media Validation pool removes them from access by ACSLS, and removing tape drives from the Media Validation pool allows ACSLS to access them. In these cases you also need to reconfigure ACSLS.

If a tape drive is replacing an existing drive, the drive type and serial number is not updated until ACSLS reads the tape drive status from the library. This happens at:

ACSLS startup.
When the ACS or LSM goes into a not ready and then ready state, causing ACSLS to recover the library.
When you vary the ACS, LSM, or tape drive offline and back online.
When you reconfigure the tape drives, LSM, or ACS.

When a tape drive is added or removed, the ACSLS configuration must be updated to add or delete the drive in the ACSLS database. Updating the ACSLS tape drive configuration avoids errors on mounts and prevents mounting a cartridge to the wrong tape drive.

Updating Tape Drives Configured to ACSLS

If tape drives have been moved or replaced in a library, use Dynamic Configuration to update the drive types and serial numbers. If one tape drive is replacing another at the same location, the update does not require customer confirmation. If tape drives are being removed from or inserted into a library, the customer must confirm the configuration change.

When updating tape drives:

Make sure all affected components are ready before issuing the config request.
Updating the ACSLS database using Dynamic Configuration is done when ACSLS is enabled. Dynamic Config is non-disruptive, and ACSLS can continue processing requests while the configuration is updated.
After issuing config lsm or config acs, it is a good idea to audit the affected LSM or ACS.

Issue these Dynamic Configuration utility commands from the Unix command prompt to update tape drive configurations. You must be logged in as acsss.

```
config drive <panel_id>
```
If the change only affects the tape drives on a single panel or SL8500 rail, use config drive <panel_id> to update the drive configuration for all tape drives on the panel.
```
config lsm <lsm_id>
```
Use config lsm <lsm_id> to update the drive configuration for all tape drives in an SL3000 with two drive panels.

Note:
config lsm <lsm_id> also updates the CAPs and storage capacity in the LSM, and should be followed by auditing the LSM.
```
config acs <acs_id>
```
Use config acs <acs_id> to update the configuration for everything in an ACS (such as an SL8500 library complex).

Note:
config acs <acs_id> also updates the CAPs and storage capacity of the entire ACS, and should be followed by auditing the ACS.