Exabyte EXB-8505 8mm manual Recording Parameters, 1Recording parameters

2 Recording Format

Recording Parameters

Table 2-1shows the recording parameters for the EXB-8205, EXB-8205XL, EXB-8505, and EXB-8505XL. The table includes the parameters for tape drives writing and reading data in three physical formats.

Table 2-1Recording parameters

Parameter	Tape drives reading and writing in this physical format:
	8500/8500ca	8200c	8200
Tape width	8.00 mm	8.00 mm	8.00 mm
	(0.315 in)	(0.315 in)	(0.315 in)
Track length	62.651 mm	62.651 mm	71.628 mm
(data + servo)b	(2.47 in.)	(2.47 in)	(2.82 in)
Tracks per	2	1	1
revolutionc
Track pitch	15.5 μm	31.0 μm	31.0 μm
	(0.000610 in)	(0.001221 in)	(0.001221 in)
Track width	15.5 μm	25.0 μm	25.0 μm.
	(0.000610 in)	(0.000984 in)	(0.000984 in)
Track density	64.506 trk/mm	32.253 trk/mm	32.254 trk/mm
	(1638.455 trk/in)	(819.226 trk/in)	(819.253 trk/in)
Areal recording	144.23 Mfc/mm2	72.115 Mfc/mm2	68.68 Mfc/mm2
density	(93.052 Mfc/in2)	(46.526 Mfc/in2)	(44.312 Mfc/in2)
Drum speed	1831.055 rpm	1831.055 rpm	1922.607 rpm
Tape speed	11.079 mm/sec	11.079 mm/sec	11.633 mm/sec
	(0.436 ips)	(0.436 ips)	(0.458 ips)
Track angle	4.9 degrees	4.9 degrees	4.9 degrees
Wrap angle	221 degrees	221 degrees	221 degrees

aEXB-8505 and EXB-8505XL only.

bIn 8200c and 8500/8500c formats, servo information is embedded in three places along the length of the track. In 8200 format, servo information is embedded at the beginning of the track.

cTracks per revolution is the number of tracks written or read for each revolution of the rotating drum assembly.

May 1994	EXB-8205 and EXB-8505	2-11
	(Standard and XL)