Dell PowerVault LTO User Manual page 74

tape cartridge.
A removable storage case that houses belt-driven magnetic tape that is wound on a supply reel and a
takeup reel.
tape drive.
A data-storage device that controls the movement of the magnetic tape in a tape cartridge. The Dell
PowerVault tape drive houses the mechanism (drive head) that reads and writes data to the tape. Its
native data capacity is 1500 GB per cartridge; with 2:1 compression, its capacity is up to 3000 GB.
tape path.
Within a tape drive, the channel in which the media moves.
V
VDC.
Volts DC (direct current).
volt.
The SI (international) unit of potential difference and electromotive force. Formally defined as the
difference of electric potential between two points of a conductor that carries a constant current of
one ampere when the power dissipated between these points is equal to one watt.
W
wet bulb temperature.
The temperature at which pure water must be evaporated adiabatically at constant pressure into a
given sample of air in order to saturate the air under steady-state conditions. Wet bulb temperature is
read from a wet bulb thermometer.
write.
To make a permanent or transient recording of data in a storage device or on a data medium.
write protected.
Applicable to a tape cartridge, the condition that exists when some logical or physical mechanism
prevents a device from writing on the tape in that cartridge.
write-protect switch.
Located on the tape cartridge, a switch that prevents accidental erasure of data. Pictures of a locked
and unlocked padlock appear on the switch. When you slide the switch to the locked padlock, data
cannot be written to the tape. When you slide the switch to the unlocked padlock, data can be written
to the tape.
Write/Read test.
Part of the Test Head diagnostic, a procedure that determines whether the tape drive can correctly
read from and write to tape.
68 Dell PowerVault LTO Tape Drive: User's Guide