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database volume
A volume that has been assigned to the TSM database.
dataserver
See Tape Library Dataserver.
data set
See linear data set.
DDM
Distributed Data Management.
default management class
A management class assigned to a policy set, which is used to govern backed up or
archived files when a user does not specify a management class for a file.
deletion exit
For MVS or VM, an installation-wide exit that informs a tape management system
or operator that the server has deleted a sequential access media volume from its
database.
delimiter
(1) A character used to indicate the beginning and end of a character string. (2) A
character that groups or separates words or values in a line of input.
desktop client
The group of backup-archive clients supported by TSM that includes clients on
OS/2, DOS, Windows, Apple, and Novell NetWare operating systems.
destination
A copy group or management class attribute that specifies the primary storage pool
to which a client file will be backed up, archived, or migrated.
device class
A named group of storage devices with common characteristics. Each device class
has a unique name and represents a device type of disk, file, optical disk, or tape.
device configuration file
A file that contains information about defined device classes, and, on some TSM
servers, defined libraries and drives. The file can be created by using a TSM
command or by using an option in the server options file. The information is a copy
of the device configuration information in the TSM database.
device driver
A collection of subroutines that control the interface between I/O device adapters
and the processor.
1419
Tivoli Storage Manager Messages
Glossary