DRIVE SERIES SPECIFICATIONS
DRIVE SPECIFICATIONS - 1320/1330 SERIES
Capacity
Model Number
1323/1333 1323A/1333A 1324/1334 1324A/1334A 1325/1335
Unformatted Capacity (MBytes)
42.7 53.3 64.0 74.7 85.3
Disk Platters
3 3 4 4 5
Read/Write Heads
4 5 6 7 8
Formatted Capacity (MBytes)
35.6 44.5 53.4 62.3 71.3
(All other specs are common for all members of the 1320 and 1330 Series)
Bytes per Sector 512
Sectors per Track 17
Cylinders 1,024
Bytes per Track 10,416
Example Video (Micropolis model 1325)
The 1320/1330 series are
MFM drives with an ST-412 interface.
PC Drive Types
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. If you are using third-party installation/partitioning software, follow the instructions included with the software, as it may perform this step automatically.
Performance
Data Rate
Seek Time (including settling time)
Track-to-Track 6 msec
Average 28 msec
Maximum 62 msec
Avg. Rotational Latency 8.33 msec
Rotational Speed 3600 rpm +/- 0.5%
Data Transfer Rate 5 Mbits/sec
Optimum Step Rate 20 microseconds or faster (buffered seek)
MTBF (power-on hours) 35,000 (1320-Series)
25,000 (1330-Series)
Positioner Fully balanced rotary voice coil
Parking Automatic park and lock
General Functional Specifications
Form-Factor 5 1/4-inch, "full-height"
Interface ST-506/412
Encoding Method MFM (Modified Frequency Modulation)
Although these drives may be capable of functioning in an RLL environment,
Micropolis does not certify or warrant them for this application.
Sectoring Soft
Write Precompensation Start Cylinder 1024
Reduced Write Current Start Cylinder 1024
Landing Zone 1024
Mounting Plane Any orientation
Power Requirements
+12V +/-5% (average) 2.0 A
+12V +/-5% (max. during start-up) 3.9 A
+5V +/-5% (average) 0.9 A
Power Dissipation, typical 29 Watts
(Board Layout and Jumper Options)
Downloads
Drive Warranty Information