Exabyte EXB-8505 8mm - Manual (Page 97)

Drum Rotation Period
Table 6-5 shows the drum rotation period for the tape drives reading
and writing tapes in all formats.
Format Drum rotation period Nominal effective
head-to-tape speed
8500c*
32.77 msec
(1831.055 rpm) 3.824 m/sec
(150.548 inch/sec)
8500*
8200c
8200 31.21 msec
(1922.607 rpm) 4.015 m/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:
The tape is at LBOT and the tape drive has not received a
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.
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.
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.
Table 6-5 Drum rotation periods
May 1994 EXB-8205 and EXB-8505 6-5
(Standard and XL)
6 Functional Specifications