HP A.06.11 - Manual (Page 292)

tape a little and resumes to write to the tape, and so on. In other
words, if the data rate written to the tape is less or equal the
data rate which can be delivered to the device by the computer
system, then the device is streaming. Streaming significantly
improves the performance of the device and use of space.
DHCP server A system running the Dynamic Host Configuration Protocol
(DHCP) providing dynamic IP address assignment and network
configuration for DHCP clients.
differential backup An incremental backup that backs up changes made since the
last full backup. To perform this type of backup, specify the Incr1
backup type.
See also
incremental backup .
differential backup (Microsoft SQL Server specific term) A database backup that
records only the data changes made to the database after the
last full database backup.
See also
backup types .
differential
database backup A differential database backup records only those data changes
made to the database after the last full database backup.
direct backup A SAN-based backup solution in which data movement directly
from disk to tape (or to other secondary storage) is facilitated
by the SCSI Extended Copy (Xcopy) command. Direct backup
lessens the backup I/O load on systems in a SAN environment.
The data movement is facilitated directly from disk to tape (or
to other secondary storage) by the SCSI Extended Copy (XCopy)
command. The command is provided by any element of the
infrastructure including bridges, switches, tape libraries, and
disk subsystems.
See also
XCopy engine .
directory junction (Windows specific term) Directory junctions use the reparse
point concept of Windows. An NTFS 5 directory junction allows
you to redirect a directory/file request to another location.
disaster recovery A process to restore a client’s main system disk to a state close
to the time when a (full) backup was performed.
disaster recovery
operating system See DR OS .
Glossary 292