Glossary

This glossary explains some of the terms used frequently in the MAREN manuals and the terms are listed in alphabetical order. Cross-references are indicated by italics.

administrator without domains
	An MAREN administrator who works in the MAREN network without domains (see MAREN administrator).
All-Domain Administrator (ADA)
	See MAREN administrator.
archive number
	Each tape has a six-character archive number under which it is known in MAREN. This archive number must match the tape’s volume serial number (VSN), which is assigned when initialization takes place in BS2000. The VSN is the name under which the tape is known in BS2000. In the MAREN manuals, the terms “archive number” and “VSN” are used synonymously.
archive record (archive database)
	Database of a tape archive system with logical and physical information about tapes, tape devices, and robots. The archive record allocates the archivenumber of a tape to its location.
archive system
	One of the tape archive systems supported by MAREN if no further distinction needs be made between the archive systems. In the MAREN manuals, the abbreviated term archive system is used for tape archive system.
archive system (real)
	The real archive systems from Quantum Corp. consist of the components archive computer, robots, and storage systems for tapes. They are linked to a BS2000 system and receive jobs from BS2000 via ROBAR.
archive system (virtual)
	The virtual ETERNUS CS archive system is an archive of virtual tapes. The virtual tapes are created on a RAID disk system and are swapped out asynchronously to real tapes or retrieved from there, as the necessity occurs. The real tapes and tape devices are transparent to the BS2000. MAREN manages only the virtual tapes.
catalog entry field
	A catalog entry at the MAREN catalog is consists of catalog entry field containing the various attributes of the tapes (e.g. the FREE-DATE catalog entry field contains the expiration date).
domain
	A domain is a group of systems within a MAREN network. A domain consists not only of the systems, but also of the tapes which are processed on these systems. The information on the domains is stored in the MAREN catalog.
Domain Administrator (DA)
	See MAREN administrator.
expiration date (of a tape)
	Until this date is reached, a reserved tape is available for the user (to be more precise: the user ID) which has been entered. Afterwards it is transferred to the pool of free tapes.
foreign tape
	This tape is not owned by the local data center. It is imported to the MAREN  catalog by a user via the administrator with the purpose of being processed in the local data center for a limited period of time.
free pool
	This is the set of free tapes available for new reservations.
free tape
	This is a tape in the local data center which can be reserved by a user when required.
locally available
	A tape is locally available if the catalog entry field TEMP-LOCATION in the volume catalog indicates a location in the vicinity of the local data center. Locations of this kind are defined in the MAREN parameter set with “L”.
location
	Archive containing tapes and tape devices in the local data center. A location is identified by its name, type and operating mode.
MAREN administrator
	The MAREN administrator monitors and manages the MAREN operation. MAREN administrators identify themselves by entering the MAREN password. When the software product SECOS is used, the user ID (SYSMAREN) of the MAREN administrator should have the TAPE-ADMINISTRATION privilege. When domains are used two different administrator roles exist: The Domain Administrator (DA). DAs are permitted to execute statements of the MARENADM administrator program within their own domain. They may not work in other domains. The All-Domain Administrator (ADA). ADAs administer the domains using special statements of the MARENADM administrator program. Furthermore they are permitted to perform DA tasks in all domains. To do this they can explicitly adopt the role of the DA. The default domain- and system-specific parameters then apply for the ADA. The ADA must have authorization to execute statements on at least one system in the MAREN network.
MAREN catalog
	Central database of the MAREN containing all information on the administered tapes. The MAREN catalog comprises the volume catalog with the catalog entry field,  secondary index files and possibly logging files (if any).
MAREN network
	A MAREN network consists of all the systems which access the same MAREN catalog.
MAREN parameters
	The MAREN parameters control execution of MAREN and the control programs MARENCP and MARENUCP. The following types of MAREN parameter exist: System-specific parameters which are defined with the MARENADM statements EDIT-/MODIFIY-MAREN-PARAMETERS. Domain-specific parameters which are defined with the MARENADM statement MODIFIY-DOMAIN-PARAMETERS. Global parameters which are defined with the MARENADM statement MODIFIY-GLOBAL-PARAMETERS.
MAREN transaction
	Access to the MAREN catalog via the control program MARENCP.
MAREN user
	Generic term for the nonprivileged MAREN user (MAREN user) and the privileged MAREN user (MAREN administrator).
MAREN user (nonprivileged)
	Possesses no special privileges. He/She reserves free tapes and manages his/her own tapes with the MAREN user program.
offline logging
	If the MAREN catalog is not available for any reason, offline logging can be activated. This means that processing continues without the MAREN catalog but that logging records continue to be written. This is only possible if the control task MARENCP continues to run. Once the error has been recovered, a current MAREN catalog can be generated using the UPDATE-MAREN-CATALOG statement. Offline logging is activated if a MARENCP ENTER file without the link name MARENCAT is started.
operating mode
	MAREN determines the archive system to which it is to send its jobs not only from the locations and the archive systems, but also from the operating mode of the location. The operating modes are “EXTERNAL”, “ROBAR-1” and “ROBAR-2”.
reserved tape
	This is a tape which belongs to the user and which is assigned to a certain user (and therefore a user ID) for a limited period of time. The reservation can be made explicitly using the RESERVE-FREE-VOLUME MAREN statement or implicitly, e.g. via the scratch request. Reservation is terminated when the expiration date is reached.
scratch request
	A tape is requested but no archive number is specified.
secondary indexes
	The MAREN catalog contains secondary indexes for the user ID and the file name in addition to the tape-related ISAM index. ISAM access to a catalog entry is therefore now also possible via the secondary indexes for the user ID and the file name.
spin off
	If a statement is rejected in a procedure or batch task because of a syntax error, or if the statement is aborted or not executed due to a processing error, all subsequent statements through to the next STEP statement are skipped. If the sequence of statements contains no further STEP statement, the spin off mechanism (spin off for short) is triggered when the program is ended (END). All commands through to the next SET-JOB-STEP, EXIT-JOB, LOGOFF, CANCEL-PROCEDURE, END-PROCEDURE or EXIT-PROCEDURE command, or to the end of the procedure or the ENTER file are skipped.
standard domain (STD-DOM)
	A standard domain contains the tapes which can be processed on all systems. Systems do not generally belong to the standard domain.
system
	Generic term for various BS2000 servers, virtual machines, and Server Units with BS2000 (SU /390, SU x86 on SE servers) which operate with the same MAREN catalog in a  MAREN network.
tape
	In the MAREN manuals, tape is used as a generic term for all real, virtual, or emulated magnetic tapes when no further distinction need be made. Volume, data carrier, and MTC are commonly used synonyms. Each tape must have its own unique identification (archive number, synonym: VSN). By analogy, the term tape device is used for all devices which accommodate a tape.
tape set
	The tapes belonging to a file version form a tape set in the MAREN catalog. However, the term is independent from the term as it is used in various BS2000 commands (e.g. CREATE-TAPE-SET).
tape status
	A tape’s availability which is stored in the MAREN catalog as an attribute. A tape can be freely available (FREE) or reserved for a particular user (RESERVED).  Foreign tapes are managed with the status FOREIGN or PRIVATE.
temporarily locked tape
	A tape is locked temporarily when the MAREN administrator adds a tape with the same archive number to the MAREN catalog. The lock remains valid until this tape, usually a foreign tape, is deleted from  the MAREN catalog. The temporarily locked tape cannot be processed again until it has been made available again in this way.
user’s own domain
	The user’s own domain is the domain on the system in which the ADA or DA is currently working.
user’s own tape
	This tape is owned by the local data center and is made available to users for a limited period, i.e. reserved in the MAREN catalog for its user ID.
virtual tape
	A virtual tape is not a real storage medium. This storage area is reserved for the  virtual tape on a real storage medium. The storage area is processed in the same way as a real tape. From the viewpoint of the user, only the virtual tape exists, the real one is transparent. The ETERNUS CS archive system, for instance, uses virtual tapes.
volume
	Data storage medium from the BS2000 point of view. Each volume is managed by the BS2000 under its own unique VSN (Volume Sequence Number). In the MAREN manuals, as a rule the term tape is used. For historical reasons, some other terms are also used in MAREN: volume catalog, volume group.
volume catalog
	File of the MAREN catalog. The volume catalog comprises the global parameter set, the system-specific parameter sets and the catalog entry containing information on all tapes managed in the MAREN.
volume group
	Logically related tapes are combined by the MAREN user to form a volume group. Via a name the user has selected, he/she addresses the tapes of a volume group in particular MAREN and MARENADM statements. The volume group is an additional catalog entry field in the volume catalog, not a separate administrative unit. All files on a tape belong to the same volume group.