HP File System Extender (FSE) manual See Medium Auxiliary Memory MAM, Retention time

MAM	See ”Medium Auxiliary Memory (MAM)”.
Management	An add-on to the basic FSE product that provides graphical user interface for most of the
Console (MC)	configuration, operation, monitoring, and management tasks in the FSE implementation.
	Management Console consists of two separate modules: Management Console server and
	Management Console client.
Management	An FSE daemon (service), responsible for accepting, handling, and executing requests for user
Interface (MIF)	actions, issued through the FSE command-line interface. It also starts and manages execution of
	the administrative jobs. The Management Interface process name is fse-mif.
media duplication	A process that creates an exact copy of an FSE tape medium. In case of emergency, a medium
	duplicate can directly replace the original.
media pool	A common storage for the migrated HSM file system data. It groups FSE media of the same
(FSE media pool)	type into a logical unit, which is tracked as a group. FSE media inside the same FSE media
	pool share such characteristics as number of medium volumes (tape partitions), system volume
	feature, capacity of medium volumes, and so on. Media pool types are: regular, WORM, and
	backup. Each FSE partition needs at least one regular FSE media pool assigned to it. The same
	media pool cannot be assigned to multiple partitions.
medium	A high-capacity magnetic tape, or a disk medium used by the FSE implementation. FSE medium
(FSE medium)	volumes are stored on tape partitions, in case of tape medium, or in file system subdirectories,
	in case of disk medium. Tape medium is further divided into tape partitions and disk medium is
	divided into subdirectories. Tape partitions store FSE medium volumes on a tape medium and
	subdirectories store FSE medium volumes on a disk medium. FSE media represent the
	secondary storage space in an FSE implementation. See also ”disk medium (FSE disk
	medium)”.
Medium Auxiliary	A memory chip integrated into magnetic tapes of the LTO Ultrium family, designed to improve
Memory (MAM)	tape performance. FSE uses Medium Auxiliary Memory in LTO Ultrium and LTO Ultrium WORM
	medium to store information about the medium, its volumes, current position of the tape, and so
	on, thus reducing the access time when searching for requested data on the medium.

medium volume A physical partition on an FSE medium, with its own volume header. There are two types of (FSE medium volume) medium volumes: data volume and system volume. Data volumes store migrated file data, while

system volumes store redundant copies of Fast Recovery Information from all data volumes on the medium. LTO media can have a single data volume and no system volume.

migration candidate An online, dirty file that is scheduled for migration.

migration candidate A list of files that were changed and have passed a certain period of time defined by the

listmigration policy, which are waiting for migration. The list is maintained by the Hierarchical Storage Manager.

migration policy	A set of rules by which the migration jobs for files on an HSM file system are initiated.
	Configuration parameters for the respective policy are specified in the FSE partition
	configuration file. Each FSE partition has its own migration policy.
migration retention	A period of time during which a migrated file is kept online before it is released. See also
time	”retention time”.

migration, migration A process, executed by the Partition Manager, that copies the file contents from the HSM file

jobsystem to the FSE media. When the process is completed, the file entries of the migrated files are moved from the migration candidate list to the release candidate list.

Name Space Catalog A part of the File System Catalog. NSC includes metadata of files on an HSM file system, such

(NSC)as directory structure, standard attributes, ownership (on Linux platform), and ACL (Access Control List) and Alternate Data Streams (on Windows platform). This metadata enables recovery of an HSM file system. See also ”File System Catalog (FSC)”.

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