Worm Function - Sony SDX-D1100V Operator's Manual

WORM Function

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Part 3. Operation
The SDX-D1100V, SDX-D900V, SDX-D700V, and SDX-D500V drives
support the WORM function. This explains the WORM function.
What is "WORM"?
"WORM" is an acronym for "Write Once Read Many", a function that allows
data to be written to the same place on a tape only once, but permits that data
to be read from the tape for any number of times. The SDX-D1100V,
SDX-D900V, SDX-D700V, and SDX-D500V drives support WORM
cartridges. When a WORM cartridge is used with an application that supports
the WORM function, data that has been written to a tape can not be
accidentally deleted or overwritten.
A WORM drive operates in the same manner as a non-WORM drive when
used with a non-WORM cartridge (henceforth referred to as "regular
cartridge").
The operation of a WORM drive and a non-WORM drive differs according
to the type of cartridge that is being used.
Tape Drive
Non-WORM drive
WORM drive
WORM Cartridges
WORM cartridges can be distinguished from regular cartridges by their
WORM logo and red shutters.
AIT-5 WORM cartridge: SDX5-400W
AIT-4 WORM cartridge: SDX4-200W
AIT-3 WORM cartridge: SDX3-100W
AIT-2 WORM cartridge: SDX2-50W
Cartridge
Regular Cartridge
(without WORM logo)
Read/Write Enabled
Read/Write Enabled
WORM Cartridge
(with WORM logo)
Waiting for Eject
Read/
Append-Write Enabled
Red
WORM logo