Re: SCSI vs IDE swapping

Alan Cox (alan@cymru.net)
Fri, 14 Jun 1996 18:36:07 +0100 (BST)


A good scsi controller (like the 2842) has swapping properties looking like
this

CPU: humm need to swap
CPU: queue this page, this page this page... controller - go do it
DISK: OK

IDE is

CPU: humm need to swap
CPU: this page
DISK: data ?
CPU: copy copy copy copy copy copy

So while IDE may be very fast all the time one process is swapping out isnt
available to others (which is very bad as busy processes swap idle ones out)

Note that the triton IDE is far far better.

Alan