PC Help Center

Answers to Personal Computing Questions

What is the difference between a double density (DD) diskette, and a high density (HD) diskette?

Answer: The terms high density and double density are pretty confusing. A high density diskette can store 1.44 MB after being formatted. (It can hold about 2.0 MB before being formatted.) A double density diskette can only hold 720K of data, or half that of a high density diskette.

Sometimes, high density diskettes are referred to as HD/DD, which makes the difference a little more obvious. Double density diskettes are pretty much obsolete now, and it looks like HD diskettes are soon to follow.

Entered: October 5, 1999 – by Per Christensson

Category: Storage

Next Storage Question:

Why won't my new IDE hard drive work after I just installed it?

space