Re: r/w speed inner vs outer tracks

[liam <allenwc@home.com>]

At 11:06 AM -0600 6/1/01, Theo de Raadt wrote:
>Please note that how pronounced this effect is, varies drive model to
>drive model.  I have seen drives that are 3x as fast at the start, and
>others that are only about 10% faster.

It should also be noted that some drives actually change the rotation 
speed with head position, that way the data density is constant 
across the surface of the disk. This means that these sort of disks 
have no difference in data rate with head position.

Early Mac floppies were like this and you could actually make music 
by setting the read and write positions!

>  > http://apollo.backplane.com/FreeBSD/tuning.html
>>  says data transfer from outer tracks is more quick than from inner
>>  ones -- however, two members from our tech stuff say that it is more
>>  quick from inner track sthan from the outer ones.
>>
>>  So,which is more quick: r/w from inner tracks or from outer tracks ?
>>  Or is this neglectable in (about 30 to 90 minutes) cpu intensive
>  > computations [i.e. (re-) sortings of indices and elements' values in
>  > large matrices] ?

-- 
Later . . . 'liam

allenwc@home.com
William C Allen, BLS, EET

"It may be that your sole purpose in life is to serve as a warning to others"
At least I /have/ a purpose!