Troubleshooting guide

284 NetBackup Troubleshooting Guide - UNIX
directory tree
The hierarchical structure in which files are organized on a disk. Each directory lists the
files and directories that are directly below it in the tree. On UNIX, the topmost directory
is called the root directory.
disaster recovery
Recovering data from backups after a disk crash or other catastrophe.
disk
Magnetic or optical disk storage media.
disk-image backup
A bit-by-bit rather than a file system backup of a disk drive on Windows NT/2000.
DLT
Digital-linear tape or tape drive type.
Domain Name Service (DNS)
A program that handles name translation for network communications.
drive cleaning
The use of a special cleaning tape to clean the heads on a drive.
duplicate image
A copy of a backup image.
encryption
Provides additional security by encrypting backup data on the client. This capability is
available only with the NetBackup Encryption option.
entry and exit ports
A slot or other opening in a robot where you can insert or remove a tape without having
to access the interior of the robot. After inserting a tape, you move it to a slot by using an
inject command. Prior to removing a tape, you move it to the port by using an eject
command. The inject and eject commands are supported through the add and move
screens in the Media Manager administration interface. Entry and exit ports are
sometimes called mailslots, or inports and outports.