HP OpenView Storage B6960-96008 manual Differential backup, Direct backup, Disaster recovery

Glossary

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 incremental backup.

differential backup (MS SQL 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

ASAN-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.

Disk Agent

A component needed on a client to back it up and restore it. The Disk Agent controls reading from and writing to a disk. During a backup session, the Disk Agent reads data from a disk and sends

G-12