Re: 9-track tape drive (Was: Re: versioned filesystems in linux)

[H. Peter Anvin]

Followup to:  <[e-mail]>
By author:    Mike Dresser <[e-mail]>
In newsgroup: linux.dev.kernel
>
> On Fri, 25 Apr 2003, H. Peter Anvin wrote:
> 
> > actually measure the real speed you can presumably vary the speed
> > arbitrarily, all the way up to the breaking point of the medium.
> 
> I suspect that method is patented, as I have seen this implemented on
> both Travan tapes, and cassette tapes.
> 
> However, there seems to have been a flaw in the implementation, where the
> breaking point was underestimated.
> 

Presumably any patents on this have since long expired (they would
have had to have been filed no earlier than 1983.)

	-hpa
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