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SEMA ELECTRONICS CO.,LTD
FLOPPY DISK DRIVE SPECIFICATION
PAG E 4
MODEL
SFD-321B
2. GENERAL SPECIFICATIONS
2.1 Performance
ITEM
LOW
DENSITY
STANDARD
1MB
HIGH
DENSITY
STANDARD
2MB
HIGH
DENSITY
*OPTION*
1.6MB
Capacity
(KBytes)
Unformatted
Per Disk 1000 2000 1600
Per Track 6.25 12.5 10.0
Fo rmatted
Per Disk
(Sector / Tr ack)
655.4 (16) 1310.7 (32) 1065.0 (26)
737.3 (9) 1474.6 (18) 1228.8 (15)
819.2 (5) 1638.4 (10) 1310.7 (8)
Recording Density (BPI)
-Inner Most Track, side 1
8,717 17,434 14,528
Data Transfer Ra te (KBits / sec)
-MFM recording
250 500
Number of Heads 2
Number of Tracks 160
Tr ack Density (TPI) 135TPI (5.33 Tracks / m m)
Drive Motor
Specification
Rotational Speed 300 RPM 360 RPM
LSV
±
1.5 % Max.
ISV
±
1.5 % Max.
Start Time 500 ms Max.
Access Time
Track to Track
Time
3ms
Head Settling T ime 15 ms Max.
Head 0 / Head 1 Offset
Head 1 is displaced 8 tracks toward the
drive spindle direction.