HP File System Extender (FSE) manual 79

debug file	A log file of a single FSE process, which records the execution trace of operations inside the
(FSE debug file)	process. FSE debug files are created only if tracing in FSE is enabled (typically on request of
	technical support personnel of FSE). FSE debug files are located in the directory
	/var/opt/fse/log/debug (on Linux platform) or in the directory
	%InstallPath%\var\log\debug (on Windows platform).
deletion policy	A set of rules that define expiration periods for groups of directories on an HSM file system.
	Files which are older than the expiration period defined by the corresponding deletion policy
	can be automatically deleted using the fsefile command. Configuration parameters for the
	deletion policy are specified in the FSE partition configuration file. Each FSE partition has its
	own deletion policy.
dirty file	A file on an HSM file system which has been recently created and not yet migrated, or a file
	that has changed since the last migration or recall.
disabled drive	An FSE drive which is temporarily put out of operation and cannot be used by migration, recall,
	administrative, maintenance and recovery jobs. This is done by changing its status in the
	Resource Management Database to disabled. The status is set by an FSE administrator with
	the fsedrive command. The example situation that calls for disabling the drive is when it
	needs cleaning or servicing.
disk buffer	One or more file systems, located on the consolidated FSE system or the FSE server, which are
(FSE disk buffer)	configured to store temporary data used by some of the FSE processes. The FSE disk buffer is
	managed by the Resource Manager. Separate file systems (on Linux platform) or volumes (disk
	partitions, on Windows platform) are usually allocated for FSE disk buffer.

disk media pool An FSE disk media pool is a special type of FSE media pool where the migrated data is stored (FSE disk media pool)on disks rather than on tape media. FSE disk media therefore emulate FSE tape media, with the

advantage of being much faster for migrations and recalls. Using and managing FSE disk media pools is similar to using and managing FSE tape media pools. See also ”media pool (FSE media pool)”.

disk medium	A disk medium is one file system mounted to a subdirectory of the directory
(FSE disk medium)	/var/opt/fse/dm (on Linux platform) or the directory %InstallPath%\var\dm (on
	Windows platform). Disk media emulates tape media and is used for regular archiving of the
	data on HSM file systems. The advantage of using disk media is in shortened recall of offline
	files. See also ”medium (FSE medium)”.
drive	A tape drive inside the FSE library, configured to be used by the FSE implementation.
(FSE drive)
duplication	See ”media duplication”.
enabled drive	An FSE drive which is put back in operation by changing its status in the Resource
	Management Database to online. This status is set manually using the fsedrive command.
	An enabled drive is fully available for FSE system operation.
erroneous drive	An FSE drive which is temporarily put out of operation and cannot be used by migration, recall,
	administrative, maintenance and recovery jobs. Its status is automatically set in the Resource
	Management Database to error as soon as the problems in the drive are detected by the
	Back End Agent. Usually, such problems occur when the drive needs servicing.
error log	A file that records error messages of the running FSE processes. It stores information on all
(FSE error log)	major errors that occur during FSE system operation. These errors often require an intervention
	of the FSE administrator. Major errors are, for example, failed initialization of an FSE medium,
	erroneous FSE drive operation, migration job failure, and so on. The FSE error log also provides
	usage statistics that can be used for fine tuning of the FSE configuration. The FSE error log,
	named error.log, is located in the directory /var/opt/fse/log (on Linux platform) or in
	the directory %InstallPath%\var\log (on Windows platform).

HP StorageWorks File System Extender Software installation guide for Linux 79