Fdd (Yd-702D-6539D-021051); Specifications - Hitachi 902 Service Manual

15.3

FDD (YD-702D-6539D-021051)

15.3.1 Specifications

Recording capacity
• When unformatted
• When formatted
256 bytes/Sector
512 bytes/Sector
1024 bytes/Sector
Recording density
Track density
Total number of
cylinders
Total number of tracks
Recording method
Recording medium
Rotational speed
Data transfer speed
Mean rotation wait time
Access time
• Mean access time
•Track-to-track
transition time
• Settling time
• Turnaround time
Motor start time (max.)
Item
2.0 Mbytes
Capacity:
1474.6
kbytes
17434 bits/inch
135 tracks/inch
80 cylinders
160 tracks
MFM
2HD
300 r/min
500 kbits/s
100 ms
94 ms
3 ms
15 ms
4 ms
0.5 s
2.0 MB Mode
Number of
sectors
: 18
15 - 7