HP StoreEver MSL Tape Libraries - Manual (Page 23)

• When Autoload mode is set, the device automatically loads the cartridge from the lowest-
numbered full slot into the tape drive. It then follows standard sequential operation.
• When Loop mode is on, the original first cartridge in the sequence is reloaded after the device
has cycled through all available cartridges. If Loop mode is off and the last cartridge has been
unloaded, the device stops loading cartridges until you load another manually.
CAUTION:
Use caution when choosing Loop mode because it makes it possible to overwrite data on
previously written cartridges.
Automatic mode: In Automatic mode, the device switches from Sequential mode into Random
mode when it receives certain SCSI commands. Automatic mode is the default setting.
• Reserved Slots — The number of slots in the extended library that are not available to the backup
software. You can store cleaning cartridges in reserved slots, or leave reserved slots empty. The
slots are reserved from the highest slot number down. The default is 0 reserved slots so the maximum
number of slots are available to the host. The extended library must have at least two slots that
are not reserved.
• Mailslot Configuration for the master Library and lower Library
• MSL2024 and MSL4048 — configures the mailslot in the lower left magazine as a mailslot
or storage slots. The MSL2024 mailslot has one slot; the MSL4048 mailslot has three slots.
Enabling the mailslot will reduce the total number of storage slots. The default is disabled.
• MSL8096 — configures the mailslot in the lower-left magazine and upper-right magazine as
mailslots or storage slots. Enabling a mailslot will reduce the number of storage slots. The default
is 0 mailslots enabled.
You can enable either or both of the mailslots by selecting the number of mailslot slots in the
Mailslot Configuration drop down list.
• 0 disables both mailslots.
• 3 enables the lower-left mailslot only.
• 12 enables the upper-right mailslot only.
• 15 enables both mailslots.
CAUTION:
Enabling or disabling a mailslot will re-number the storage slots in one or both of the Libraries.
After enabling or disabling any mailslots, update the backup software inventory. You may also
need to re-configure the backup software to adjust the number of storage slots and presence of
the mailslot.
• Auto Clean Enabled — When auto clean is enabled, the device automatically loads a cleaning
cartridge when a tape drive needs to be cleaned. The device identifies a tape cartridge as a
cleaning cartridge if it has a bar code label that starts with CLN or after an unlabeled cleaning
tape has been loaded into the tape drive.
The Library can use a cleaning cartridge from any slot, even if the slot is reserved. The Library
keeps track of the usage count for each of the cleaning cartridges. When multiple cleaning cart-
ridges are available, the Library will first select a cleaning cartridge with an unknown usage count
so the Library can start tracking the cartridge's usage count. If the Library knows the usage count
for all of the cleaning cartridges, the Library will select the one with the highest usage count.
HP StorageWorks MSL Library Extender user guide 23