From owner-freebsd-hackers Fri May 31 09:45:23 1996 Return-Path: owner-hackers Received: (from root@localhost) by freefall.freebsd.org (8.7.5/8.7.3) id JAA22951 for hackers-outgoing; Fri, 31 May 1996 09:45:23 -0700 (PDT) Received: from godzilla.zeta.org.au (godzilla.zeta.org.au [203.2.228.19]) by freefall.freebsd.org (8.7.5/8.7.3) with SMTP id JAA22944 for ; Fri, 31 May 1996 09:45:19 -0700 (PDT) Received: (from bde@localhost) by godzilla.zeta.org.au (8.6.12/8.6.9) id CAA12346; Sat, 1 Jun 1996 02:39:59 +1000 Date: Sat, 1 Jun 1996 02:39:59 +1000 From: Bruce Evans Message-Id: <199605311639.CAA12346@godzilla.zeta.org.au> To: bde@zeta.org.au, freebsd-hackers@freefall.freebsd.org, mrm@MARMOT.Mole.ORG, sextonr.crestvie@squared.com Subject: Re: Disktab and SCSI Performance. Sender: owner-hackers@FreeBSD.ORG X-Loop: FreeBSD.org Precedence: bulk >Rotdelay and/or artificially increased interleave can be useful for >fast disks, too. It can be used to prevent a fast drive on a non-dma >controller from starving the CPU to the exclusion of user programs. >Sometimes slowing disk I/O can be an advantage. From experience :-) Can it be used to prevent fast ID drives from starving the CPU to the exclusion of kernel code? :-) Bruce