Minimizing Elevator and PTP Activity
There are several things you can do to minimize elevator and PTP activity.
Table C-2 Recommendations to Minimize Elevator and PTP Activity
Action | Recommendation |
---|---|
Mounting cartridges | Whenever possible, when mounting a tape, use cartridges and tape drives that are in the same LSM. LSM refers to a single rail within the SL8500 library. Each SL8500 contains 4 LSMs. |
Using float |
Take advantage of the ACSLS “ When cartridges are dismounted, ACSLS tries to avoid elevator (pass-thru) activity among LSMs by assigning a new home cell whenever the cartridges' old home cell is in a different LSM. ACSLS attempts to put the cartridge away:
|
Entering cartridges |
Example: You have only LTO drives on LSMs 2 and 3, and you want the LTO cartridges to be located in these LSMs. When entering these cartridges, you should place them in the CAP magazines adjacent to LSMs 2 and 3. ACSLS then makes every effort to put the cartridges in the LSM that is adjacent to that CAP magazine. |
Scratch cartridges | Make sure that scratch cartridges are available in sufficient quantity in each LSM where they will be used. For an SL8500, this means having scratch cartridges available on each rail (LSM) of the library. |
Free cells | Make sure that there are adequate free cells in each LSM. |