Owner's manual

Chapter Four - Tape Cartridges
4.3 Write-Protecting a Data Cartridge
Each data cartridge has a write-protect switch that protects the data cartridge from being overwritten. See
Figure 9 to protect the cartridge. Slide the switch all the way to the left. The hole will be visible. Data can
then be read from the tape but not written to it. Slide the switch to the right (covering the hole) to write-
enable the cartridge. Data can then be written to and read from the tape.
Write Protected
White Switch to the Left
Digital
Data
Storag
Label Side Up
Write Enabled
White Switch to the Right
Digital
Data
Storag
Label Side Up
Cartridge to be Loaded Cartridge to be Loaded
in this Orientation in this Orientation
Figure 9 Write-protecting a cartridge
Caution
The tape log, which contains a history of tape usage is not updated when the cartridge is
write-protected. The tape log becomes inaccurate if a cartridge is used when write-
protected.
4.4 Labeled and Unlabeled Tapes
The 5242-2SE can use both labeled and unlabeled cartridge tapes. A tape label is a record at the beginning
of a tape that identifies the tape volume and the files it contains. An expiration date protects labeled-tape
information from being accidentally overwritten. A scratch tape is a labeled tape with an expiration date
that has passed. If a tape has no standard label, it is considered unlabeled. NonStop systems support two
standard tape-label formats: ANSI and IBM-MVS.
Note
: Because labeled tapes can be cataloged and offer security features for protecting data, labeled
tapes should be used with the 5242-2SE.
4.5 Loading a Tape Cartridge
Warning Ensure the 5242-2SE power is on and the tape drive is ready before loading a cartridge.
Be careful not to insert a cartridge backwards or upside down.
4.5.1 Power on the 5242-2SE. Input power for the 5242-2SE is controlled by the NonStop server.
Note
: Use only cartridges labeled DAT72 or DDS-3. Tape cartridges labeled DDS-2 or DDS-1
do not work. Check that only one label is stuck to the label area of the cartridge and that
it is stuck firmly. Never use nonstandard labels, and never stick anything to the cartridge
outside the label area.
4.5.2 Insert a cartridge into the slot on the front panel. The cartridge is now in a partially loaded state.
The drive threads the tape, initiates a load sequence, and goes online. The load sequence takes
approximately 20 seconds for a new tape and 15 seconds for a tape that already contains data.
HP StorageWorks DAT 72 (Model 5242-2SE) User's Guide 11 HP Part Number 528297-003 July 2005