8" Soft Sectored Diskette
8" Hard Sectored Diskette
8" Single-sided Diskette
8" diskettes. Elephant brand DSDD soft sectored diskette,
and a Data General hard sectored diskette. The hard sectored diskette
has an index hole for each sector on the track, while the soft sectored
diskette has a single index hole. 8" diskettes have a write-enable
notch, which must be covered in order to write to the diskette.
The index hole on double-sided diskettes is displaced farther to the
right than on single-sided diskettes. Capacity for 8" diskettes varied
between systems, but was typically 500KB and 1MB for double density,
single and double sided.
5-1/4" Single-sided Diskette
5-1/4" Double-sided Diskette
8" and 5-1/4" Comparison
5-1/4" diskettes, double-density, single and double-sided. These diskettes
have a write-protect notch, which is covered to prevent writing
to the diskette. Single and double-density diskettes tend to have a
center reinforcement ring, while high-density (1.2MB) diskettes usually
do not. Single-sided, double-density diskettes typically held around
180KB while double-sided held 360KB, depending on the formatting.
3-1/2" 720KB Diskette
3-1/2" 1.44MB Diskette
3-1/2" diskettes, double-sided. The 720KB diskettes have a single
write-protect hole, which is covered to allow writing. The 1.44MB
diskettes have a second hole on the other side to indicate their
higher capacity to the drive.
Return to the Storage Media page.
Return to the Old Technology Collection page.
Last updated on
Wednesday, June 03, 2009