Subject: Re: Varying disk geometry
To: None <mouse@Collatz.McRCIM.McGill.EDU>
From: Mike Long <>
List: tech-kern
Date: 11/22/1995 14:59:27
>Date: Wed, 22 Nov 1995 07:23:23 -0500
>From: der Mouse <mouse@Collatz.McRCIM.McGill.EDU>

>I'm hardly a filesystem performance guru myself...but I do know that
>FFS's idea of optimal block placement and cylinder groups and suchlike
>is rather silly on modern disks with varying sectors per track.

Many modern disks also have RAM caches, which obviate seek,
head-switch, and rotational delay altogether.  I don't know if or how
FFS could take advantage of that, however.
Mike Long <> 
VLSI Design Engineer         finger for PGP public key
Analog Devices, CPD Division          CCBF225E7D3F7ECB2C8F7ABB15D9BE7B
Norwood, MA 02062 USA                assert(*this!=opinionof(Analog));