Spectra T200 - Architecture Overview

Chapter 2 — Architecture Overview Media Pools
December 2019 User Guide—Spectra T200, T380, and T680 Libraries
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MEDIA POOLS
Inside the library, magazines, and the cartridges they contain, are logically
grouped through the use of pools. These pools are made up of chambers,
each of which accommodates a single magazine. The library has three
different types of pools: the free pool, entry/exit pool(s), and storage
pool(s). Figure 19 on page 52 shows how the entry/exit and storage pools
are related to partitions in the library.
Free pool Chambers that are not assigned to a partition are in the free
pool. These chambers can be assigned to a storage partition or a cleaning
partition. The chambers in the free pool cannot be accessed through the
BlueScale user interface or the storage management software until they are
added to a partition.
Entry/Exit pool The chambers in a storage partition’s entry/exit pool
provide an interim storage location for cartridges during import and
export operations. Together, the entry/exit pool and the TAP function as a
configurable entry/exit port for the library.
You specify the number of chambers assigned to the entry/exit pool when
you create a storage partition. Cleaning partitions do not have an entry/exit
pool.
A cartridge is in the entry/exit pool for one of the following reasons:
 It was ejected from the storage pool by the storage management
software or moved manually using the BlueScale user interface. To
remove the cartridges from a library, the operator uses the library’s
BlueScale user interface to initiate the export process.
—OR—
 A magazine containing one or more cartridges was imported into the
library using the TAP. From the entry/exit pool, the cartridges can be
imported into the storage partition’s storage pool either by the storage
management software or manually through the BlueScale user
interface.
—OR—
 A magazine containing one or more special-purpose cartridges was
imported into the library using the TAP. These cartridges may be used
for cleaning a drive using the DLM Drive Test feature, or for updating
drive firmware using a code load tape.