Exabyte EXB-8505 8mm manual Drum Rotation Period, Tape Tension Release and Drum Motion Suspension

6 Functional Specifications

Drum Rotation Period

Table 6-5 shows the drum rotation period for the tape drives reading and writing tapes in all formats.

Table 6-5Drum rotation periods

Format	Drum rotation period	Nominal effective
		head-to-tape speed
8500c*
	32.77 msec	3.824 m/sec
8500*
	(1831.055 rpm)	(150.548 inch/sec)
8200c
8200	31.21 msec	4.015 m/sec
	(1922.607 rpm)	(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.

May 1994	EXB-8205 and EXB-8505	6-5
	(Standard and XL)