Date: Fri, 25 Oct 2002 02:16:09 -0400 From: Munish Chopra <mchopra@engmail.uwaterloo.ca> To: current@FreeBSD.ORG Subject: Re: is src/UPDATING up to date Message-ID: <20021025061609.GC5218@opiate.thirteenandtwo.org> In-Reply-To: <7891656.1035530926@sauron> References: <7891656.1035530926@sauron>
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On 2002-10-25 07:28 +0000, Mathieu Arnold wrote: > Hi > > I was twiddling with my yesterday's current, I was trying to make release > to see how things were going, and I saw at the top of UPDATING that : > > In addition, IDE write caching is currently disabled by default > due to on-going concerns about disk write order and file system > integrity. Re-enabling write caching can substantially improve > performance. > This part of the performance disclaimer has been untrue for a while now. It is once again enabled by default. > I looked at ata(4), told me about hw.ata.wc, which was supposed to be > enabled by default, and it was, so, my question is, is the comment above > still true, and how do I enable write cache if it is, if it's not true any > more, maybe it should be removed. > As stated, it's untrue. You can check the status of write caching by using the sysctl(8) facility. You're looking for hw.ata.wc. It'd probably be a good idea for someone to nuke that paragraph... -- Munish Chopra To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message
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