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OCTOBER 2006 VXA-320 TAPE DRIVE
51
RELIABILITY SPECIFICATIONS
TAPE SPEED AND ACCESS TIME
The time required to move the tape to a specified position depends on the
operation being performed. Ta ble 7-4 lists the tape speeds and access times for
the VXA-320 tape drive.
RELIABILITY SPECIFICATIONS
Tab le 7- 5 provides reliability specifications for the VXA-320 tape drive.
Table 7-4 Tape speed and access times
Search speed
(maximum)
165 x read/write speed (1 GB/second, native)
Mid-tape reposition
time (average)
a
,
b
a
In addition to maximum search speed, the mid-tape reposition times depend on acceleration,
deceleration, and read positioning to location.
b
The VXA-320 tape drive does not support VXAtape V6, V10, or V17.
X6 cartridge: 75 seconds
X10 cartridge: 75 seconds
X23 or V23
c
cartridge: 120 seconds
c
The VXA-320 tape drive can read or write VXA-2 formatted V23 tapes.
Load time (logical) 45 seconds for an initialized tape
50 seconds for an uninitialized tape
Unload time (logical) 65 seconds
Tape speed 17.90 mm/second (typical)
Table 7-5 Reliability specifications
Mean Time Between Failures (MTBF) 300,000 hours
Mean Time to Repair (MTTR) 30 minutes
Service life 5 years
Write reliability Bit error rate of less than 1x10
-16
Read reliability Bit error rate of less than 1x10
-17
Loads/unloads 50,000 cycles, minimum