Drive - Compaq Armada M700 Series Maintenance And Service Manual

6.7 LS-120 Drive
Formatted capacity (bytes)
Sector size (bytes)
Sectors
Magnetic tracks surface
Optical servo
tracks/surface
Sectors/track
Sector interleave
Spare sectors
Zones (each side)
Average random seek
Track-to-track seek
Max single seek
Average latency
Motor RPM
Motor start time
Track density
Track width
Encoding method
Max flux density
Recording density
Nominal transfer rate
Nominal sustained transfer
rate across interface
Buffer transfer rate
Table 6-8
LS-120 Drive
1.68 MB DMF 1.44 MB
1,720,320 1,474,560
512 512
3,360 2,880
80 80
N/A N/A
21 18
2:1 1:1
0 0
1 1
70 ms 70 ms
25 ms 25 ms
170 ms 170 ms
41.67 ms 41.67 ms
720±0.5% 720±0.5%
800 ms 800 ms
135 TPI 135 TPI
125 µm 125 µm
MFM MFM
17,334 FCI 17,334 FCI
17,334 BPI 17,334 BPI
150 KB/sec 150 KB/
sec
65 KB/sec 55 KB/sec
read, read,
32 KB/sec 28 KB/sec
write write
4.0 MB/sec 4.0 MB/sec
1.2 MB 1.2 MB
1,261,568 1,228,800
1,024 512
1,232 2,400
77 80
N/A N/A
8 15
1:1 1:1
0 0
1 1
70 ms 70 ms
25 ms 25 ms
170 ms 170 ms
41.67 ms 41.67 ms
720±0.5% 720±0.5%
800 ms 800 ms
135 TPI 135 TPI
125 µm 125 µm
MFM MFM
17,334 FCI 17,334 FCI
17,334 BPI 17,334 BPI
125 KB/ 125 KB/
sec sec
49 KB/sec 46 KB/sec
read, read,
25 KB/sec 23 KB/sec
write write
4.0 MB/sec 4.0 MB/sec
720 KB
737,280
512
1,440
80
N/A
9
1:1
0
1
70 ms
25 ms
170 ms
41.67 ms
720±0.5%
800 ms
135 TPI
125 µm
MFM
17,334 FCI
17,334 BPI
75 KB/sec
28 KB/sec
read,
14 KB/sec
write
4.0 MB/sec
Specifications 6-7