Spectra T200 - MLM Prescan and Postscan

Chapter 9 — Configuring and Using Media Lifecycle Management BlueScale Media Lifecycle Management
December 2019 User Guide—Spectra T200, T380, and T680 Libraries
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Expired MLM-Enabled Cleaning Cartridges Each time an MLM-enabled
cleaning cartridge is used in a drive, the drive decrements the number of
cleans remaining on the cartridge. When the cartridge is unloaded from
the drive, MLM reads the number of cleans remaining from the cartridge
MAM. When the number of cleans remaining reaches zero, the library
flags the cartridge as expired and does not attempt to use the cartridge
again. Because the library does not need to load a cleaning cartridge into a
drive to determine that it is expired, cleaning failures due to an expired
cartridge are eliminated (assuming the cleaning partition contains a good
cleaning cartridge). Information about an expired cleaning cartridge
remains in the MLM database even after the cartridge is exported from the
library.
Expired Non-MLM Cleaning Cartridges When MLM is not enabled or if the
cleaning cartridges are not MLM-enabled, the library must load the
cleaning cartridge into a drive to determine whether it is expired. When an
expired cleaning cartridge is loaded into a drive, it is immediately ejected;
the cleaning fails. The library flags the cleaning tape as expired in the
cartridge inventory and generates system messages to notify you of the
expired cleaning tape and the failed drive cleaning. The library does not
attempt to use the expired cartridge for subsequent cleanings.
The library does not store any information about non-MLM cleaning
cartridges in the MLM database. The library retains the information about
an expired cleaning cartridge for as long as it remains in the library or until
the library is power-cycled. If an expired non-MLM cartridge is exported
and then reimported into the library, the cartridge must be loaded into a
drive in order to identify it as expired.
MLM PreScan and PostScan
Overview MLM PreScan and PostScan are configurable background
processes that use a TS11xx technology drive or an LTO-4 or later
generation drive to provide two levels of verification for data cartridges.
See Using PreScan on page 288 and Using PostScan on page 289 for
detailed information about configuring and using PreScan and PostScan.
Note: PostScan and Spectra SKLM encryption key management cannot
be configured for use in the same partition.
Enable and Configure PreScan and PostScan Both PreScan and PostScan
are enabled and configured as part of the partition creation process, as
described in Enable and Configure MLM PreScan and PostScan on
page 197. During configuration you set the scanning frequency and select
the types of scan you want to use.