Справочник Пользователя для Exabyte EXB-8505 8mm
Recording Parameters
Table 2-1 shows 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.
EXB-8205XL, EXB-8505, and EXB-8505XL. The table includes the
parameters for tape drives writing and reading data in three physical
formats.
Parameter
Tape drives reading and writing in this physical format:
8500/8500c
a
8200c
8200
Tape width
8.00 mm
(0.315 in)
(0.315 in)
8.00 mm
(0.315 in)
(0.315 in)
8.00 mm
(0.315 in)
(0.315 in)
Track length
(data + servo)
(data + servo)
b
62.651 mm
(2.47 in.)
(2.47 in.)
62.651 mm
(2.47 in)
(2.47 in)
71.628 mm
(2.82 in)
(2.82 in)
Tracks per
revolution
revolution
c
2
1
1
Track pitch
15.5
µ
m
(0.000610 in)
31.0
µ
m
(0.001221 in)
31.0
µ
m
(0.001221 in)
Track width
15.5
µ
m
(0.000610 in)
25.0
µ
m
(0.000984 in)
25.0
µ
m.
(0.000984 in)
Track density
64.506 trk/mm
(1638.455 trk/in)
(1638.455 trk/in)
32.253 trk/mm
(819.226 trk/in)
(819.226 trk/in)
32.254 trk/mm
(819.253 trk/in)
(819.253 trk/in)
Areal recording
density
density
144.23 Mfc/mm
2
(93.052 Mfc/in
2
)
72.115 Mfc/mm
2
(46.526 Mfc/in
2
)
68.68 Mfc/mm
2
(44.312 Mfc/in
2
)
Drum speed
1831.055 rpm
1831.055 rpm
1922.607 rpm
Tape speed
11.079 mm/sec
(0.436 ips)
(0.436 ips)
11.079 mm/sec
(0.436 ips)
(0.436 ips)
11.633 mm/sec
(0.458 ips)
(0.458 ips)
Track angle
4.9 degrees
4.9 degrees
4.9 degrees
Wrap angle
221 degrees
221 degrees
221 degrees
a EXB-8505 and EXB-8505XL only.
b In 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.
c Tracks per revolution is the number of tracks written or read for each revolution of the rotating drum assembly.
Table 2-1 Recording parameters
May 1994
EXB-8205 and EXB-8505
2-11
(Standard and XL)
2 Recording Format