Date: Tue, 29 Oct 2002 05:33:11 +0300 (MSK) From: "."@babolo.ru To: Alex.Wilkinson@dsto.defence.gov.au Cc: hackers@FreeBSD.ORG Subject: Re: [hardware] Tagged Command Queuing or Larger Cache ? Message-ID: <200210290233.g9T2XDDw033711@aaz.links.ru> In-Reply-To: <20021029095553.N91719-100000@squirm.dsto.defence.gov.au>
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> Howdy Crew, > > I am about to buy a new hard disk for my FreeBSD work station. > Since FreeBSD's ATA drivers implement Tagged Command Queuing and IBM make > the only ATA disks that implement tagged command queuing ( ie since the 60GXP family ), > an IBM 40GB 120GXP "looks like" the best solution. > > However, my question is: > > Do the benifits from a having a larger disk cache such as the "WD 40GB 7200RPM w/8MB Cache" > has, outweigh the benefits of Tagged Command Queuing ? As far as I know big cashe helps for one I/O thread, and Tagged Queuing helps more in multiple I/O threads. The first series of Tagged Queuing drive was far before 60GXP - it was DPTA. Then DLTA (I used this hardly, some of them was slightly buggy) -- @BABOLO http://links.ru/ To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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