PowerBook 100 External SuperDrive: Specifications
This article gives technical specifications for the Macintosh HDI-20 External 1.4MB Floppy Disk Drive (PowerBook 100 External SuperDrive).
Recording Media
---------------
* Disk diameter: 3.5 inches (9.0 cm)
* Recording surfaces: 2
*╩Tracks per inch: 135 (5.31 per mm)
* Number of cylinders: 80
Capacity
--------
* Formatted data:
1.4MB (MFM)
800K (GCR)
720K (MFM)
* Unformatted data: 1 or 2MB
Drive Characteristics
---------------------
* Seek time (track-to-track): 3 milliseconds
* Settle time: 18 milliseconds
* Drive startup time: 800 milliseconds
Head Position Accuracy
----------------------
* ▒ 30 micrometers
Interface
---------
* Connects directly to the Macintosh PowerBook 100 HDI-20 floppy drive
port, via the drive's attached interface cable.
Environment
-----------
* Operating temperature: 50 to 122í F (10 to 50í C)
* Relative humidity: 5% to 90% noncondensing
* Storage temperature: -40 to +149í F (-40 to +65í C)
System Requirements
-------------------
* Macintosh PowerBook 100
Dimensions and Weight
---------------------
* Height: 1.1 inches (28 mm)
* Width: 4.5 inches (115 mm)
* Depth: 7.0 inches (174 mm) not including attached interface cable
* Weight: 1.5 lb. (.68 kg)
Article Change History:
27 August 1993 - Revised storage temperature
Support Information Services
---------------
* Disk diameter: 3.5 inches (9.0 cm)
* Recording surfaces: 2
*╩Tracks per inch: 135 (5.31 per mm)
* Number of cylinders: 80
Capacity
--------
* Formatted data:
1.4MB (MFM)
800K (GCR)
720K (MFM)
* Unformatted data: 1 or 2MB
Drive Characteristics
---------------------
* Seek time (track-to-track): 3 milliseconds
* Settle time: 18 milliseconds
* Drive startup time: 800 milliseconds
Head Position Accuracy
----------------------
* ▒ 30 micrometers
Interface
---------
* Connects directly to the Macintosh PowerBook 100 HDI-20 floppy drive
port, via the drive's attached interface cable.
Environment
-----------
* Operating temperature: 50 to 122í F (10 to 50í C)
* Relative humidity: 5% to 90% noncondensing
* Storage temperature: -40 to +149í F (-40 to +65í C)
System Requirements
-------------------
* Macintosh PowerBook 100
Dimensions and Weight
---------------------
* Height: 1.1 inches (28 mm)
* Width: 4.5 inches (115 mm)
* Depth: 7.0 inches (174 mm) not including attached interface cable
* Weight: 1.5 lb. (.68 kg)
Article Change History:
27 August 1993 - Revised storage temperature
Support Information Services