Chapter 3, Managing Media
Erasing Media
139
Erasing Media
You can do a quick (short) or long erase of used media. The media must be currently
unassigned by NetBackup and have no valid NetBackup images on it. After the media is
erased, a NetBackup media label is written on the media.
Note
Media erase functions are not supported on NDMP drives.
Caution
If you use this function, any data written on the media will no longer be
available for a restore or import.
SCSI Quick Erase
If you select a quick (or short) erase, Media Manager will perform a SCSI Quick Erase. For
a SCSI Quick Erase, the media is rewound and an erase gap is recorded on the media. The
format of this gap is drive dependent, and can be an end-of-data (EOD) mark or a
recorded pattern that is recognized by the drive as not being data.
Some drives do not support a quick erase, (for example QUANTUM DLT7000). For drives
that do not support a quick erase, the new tape header that is written acts as an
application-specific quick erase.
SCSI Long Erase
If you select a long erase, Media Manager will do a SCSI Long Erase. For this erase, the
media is rewound and the data on the tape is overwritten with a known data pattern. A
SCSI Long Erase is also called a secure erase, since it erases the recorded data completely.
Caution
A long erase is a time-consuming operation and can take as long as 2 to 3 hours.
For example, it takes about 45 minutes to erase a 4mm tape on a standalone
drive
▼
To erase media
1.
In the NetBackup Administration Console, click Media and Device Management >
Media
.
2.
In the volumes pane, select a volume or volumes that you want to erase. If multiple
volumes are selected, they must all have identical robot-residence information.
The media must be currently unassigned by NetBackup and have no valid NetBackup
images.
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