Справочник Пользователя для Exabyte EXB-8505 8mm
Drum Rotation Period
Table 6-5 shows the drum rotation period for the tape drives reading
and writing tapes in all formats.
and writing tapes in all formats.
Format
Drum rotation period
Nominal effective
head-to-tape speed
head-to-tape speed
8500c*
32.77 msec
(1831.055 rpm)
(1831.055 rpm)
3.824 m/sec
(150.548 inch/sec)
(150.548 inch/sec)
8500*
8200c
8200
31.21 msec
(1922.607 rpm)
(1922.607 rpm)
4.015 m/sec
(158.075 inch/sec)
(158.075 inch/sec)
*EXB-8505 and EXB-8505XL only
Tape Tension Release and Drum Motion Suspension
The tape drive releases tape tension under either of the following
conditions:
conditions:
The tape is at LBOT and the tape drive has not received a
command to move the tape in the last 5 seconds.
command to move the tape in the last 5 seconds.
The tape is not at LBOT and the tape drive has not received a
command to move the tape in the last 15 seconds.
command to move the tape in the last 15 seconds.
After releasing tape tension, the tape drive will stop drum rotation if
it does not receive a tape motion command within the next 60 seconds.
it does not receive a tape motion command within the next 60 seconds.
If tape tension has been released, approximately 1.5 seconds will
elapse before the tape drive can perform a tape motion command. If
the drum rotation has been stopped, approximately 7 seconds will
elapse before the tape drive can perform a tape motion command.
elapse before the tape drive can perform a tape motion command. If
the drum rotation has been stopped, approximately 7 seconds will
elapse before the tape drive can perform a tape motion command.
Table 6-5 Drum rotation periods
May 1994
EXB-8205 and EXB-8505
6-5
(Standard and XL)
6 Functional Specifications