Subject: Re: kern/2679: addition of seek stat
To: Jason Thorpe <firstname.lastname@example.org>
From: Justin T. Gibbs <email@example.com>
Date: 08/11/1996 20:13:43
>Charles Hannum mentioned to be in passing some months ago that an implied
>seek in disksort() might be appropriate (when disksort() rewinds to the
>beginning of the queue). However, this too would skew the metrics of
>disks that do independent seeks.
Devices that support tagged queueing shouldn't use disksort. I don't know
how you can properly determine the number of seeks for ZBR disks unless
the SCSI spec provides this type of statistic in one of the mode pages.
Justin T. Gibbs
FreeBSD: Turning PCs into workstations