D
data drive
A physical data stor
age device that can be either a hard disk drive (HDD) or a ash drive (also called
a solid-state de
vice).
DBV
Hitachi Database Validator
DC
data center
delta resync
A disaster recovery solution in which TrueCopy and Universal Replicator systems are congured to
provide a quick recovery using only dierential data stored at an intermediate site.
device
A physical or logical unit with a specic function.
device emulation
Indicates the type of logical volume. Mainframe device emulation types provide logical volumes of
xed size, called logical volume images (LVIs), which contain EBCDIC data in CKD format. Typical
mainframe device emulation types include 3390-9 and 3390-M. Open-systems device emulation
types provide logical volumes of variable size, called logical units (LUs), that contain ASCII data in FBA
format. The typical open-systems device emulation type is OPEN-V.
disaster recovery
A set of procedures to recover critical application data and processing after a disaster or other
failure.
disk array
Disk array, or just array, is a complete storage system, including the control and logic devices,
storage devices (HDD, SSD), connecting cables, and racks
disk controller (DKC)
The hardware component that manages front-end and back-end storage operations. The term DKC
can refer to the entire storage system or to the controller components.
DKC
See disk controller (DKC).
DKCMAIN
disk controller main. Refers to the software for the storage system.
DKU
disk unit. Refers to the cabinet (oor model) or rack-mounted hardware component that contains
data drives and no controller components.
dump
A collection of data that is saved to a le when an error or crash occurs. The data is used by support
personnel to determine the cause of the error or crash.
Dump tool
Downloads Device Manager - Storage Navigator conguration information onto recording media for
backup and troubleshooting purposes.
Glossary
System Administrator Guide for VSP Gx00 models and VSP Fx00 models 351
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