DRIVE SERIES SPECIFICATIONS
FLEXIBLE DISK DRIVE SPECIFICATIONS - 1115 SERIES
Capacity and media
| Model Number |
1115-2 |
1115-4 |
1115-5 |
1115-6 |
1117-6 |
| Capacity |
315K |
630K |
360K |
720K |
720K |
| Head |
Single head |
Dual head |
Single head |
Dual head |
Dual head |
| Tracks / Resolution |
77 / 100TPI |
77 / 100TPI |
80 / 96TPI |
80 / 96TPI |
80 / 96TPI |
| Size |
5.25" full-height |
5.25" full-height |
5.25" full-height |
5.25" full-height |
5.25" full-height |
| Media type |
SSDD |
DSQD |
SSDD |
DSQD |
DSQD |
Overview
The Micropolis 1115 series of flexible disk drives consists of drive mechanics assemblies meant to be
installed in an OEM drive enclosure.
Model 1115-2 and 1115-4 drives use a track density of 100 tracks per inch (TPI) with 77 total tracks,
following Micropolis' "Quad Density" format. Model 1115-5 and 1115-6 drives use a track density of 96 TPI,
with 80 total tracks, in-line with Shugart's double stepping HD format. The difference in track density
and total number of tracks results from using a different lead screw in the positioner assembly.
Video of Model 1115-VI
Disk media
Floppy disk media used to be manufactured as hard-sectored and soft-sectored. Read more about
hard-sector and
soft-sector media in the Knowledge base. Within the drive's mechanics a photosensor circuit is used to detect
the occurrence of the diskette's index mark (and sector marks, if present ). But the drive's mechanics and electronics
are agnostic towards these marks as the interpretation is delegated to the host controller. In operation, the drive's
sector/index photosensor circuit will generate a signal for each hole passing the disk's window. The host controller
must be able to differentiate the index hole from the sector holes and incorporate these signals into its logics.
Power Dissipation
Standby 5.3 watts max
Operating 16 watts nominal
Head load Solenoid (option) 3 Watts
Door Lock Solenoid (option) 0.7 watts
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