DRIVE SERIES SPECIFICATIONS
DRIVE SPECIFICATIONS - Model 1664
Capacity
Unformatted Capacity (MBytes) 389.3
Disk Platters 4
Read/Write Heads 7
Cylinders 1,780
Bytes per Track 31,248
Formatted Capacity (MBytes) 344.4
Bytes per Sector 512
Blocks per Track 54
PC Drive Types
If you are using third-party installation software on an on-board BIOS on the controller, follow the instructions included with the software or controller. Otherwise, examine the entries in your system drive table and find the type that most resembles the head and cylinder parameters of the drive without exceeding these parameters.
Performance
Seek Time (including settling time)
Track-to-Track 4 msec
Average 15 msec
Maximum 30 msec
Avg. Rotational Latency 8.33 msec
Rotational Speed 3600 rpm +/- 0.5%
Data Transfer Rate 15 Mbits/sec
MTBF (power-on hours) 150,000
Positioner Fully balanced rotary voice coil
Parking Automatic park and lock
General Functional Specifications
Form-Factor 5 1/4-inch, "full-height"
Interface ESDI
Sectoring Hard or Soft
(set by W1 - see Configuration Information)
Write Precompensation Start Cylinder 1780 *
Reduced Write Current Start Cylinder 1780 *
* These are effectively turned off by specifying a non-existent cylinder.
Some systems accomplish this by using a value of "-1".
Landing Zone 1780
Mounting Plane Any orientation
Drivers/Receivers Single-ended
Power Requirements
+12V +/-5% 0.9 A average while seeking
2.0 A max. during start-up
+5V +/-5% (average) 0.75 A
Power Dissipation, typical 14 Watts
(Board Layout and Jumper Options)
Drive Warranty Information