Date: Mon, 18 Jan 2010 21:41:53 -0500 From: Garrett Moore <garrettmoore@gmail.com> To: freebsd-stable@freebsd.org Cc: "O. Hartmann" <ohartman@mail.zedat.fu-berlin.de> Subject: Re: immense delayed write to file system (ZFS and UFS2), performance issues Message-ID: <7346c5c61001181841j3653a7c3m32bc033c8c146a92@mail.gmail.com> In-Reply-To: <201001191250.23625.doconnor@gsoft.com.au> References: <4B54C100.9080906@mail.zedat.fu-berlin.de> <4B54C5EE.5070305@pp.dyndns.biz> <201001191250.23625.doconnor@gsoft.com.au>
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The drives being discussed in my related thread (regarding poor performance= ) are all WD Green drives. I have used wdidle3 to set all of my drive timeout= s to 5 minutes. I'll see what sort of difference this makes for performance. Even if it makes no difference to performance, thank you for pointing it ou= t -- my drives have less than 2,000 hours on them and were all over 90,000 load cycles due to this moronic factory setting. Since changing the timeout= , they haven't parked (which is what I would expect). On Mon, Jan 18, 2010 at 9:20 PM, Daniel O'Connor <doconnor@gsoft.com.au>wro= te: > On Tue, 19 Jan 2010, Morgan Wesstr=F6m wrote: > > The disks involved don't happen to be Western Digital Green Power > > disks, do they? The Intelli-Park function in these disks are wrecking > > havoc with I/O in Linux-land at least, causing massive stalls and > > iowait through the roof during the 25-30 seconds it takes for the > > heads to unload after parking. I have two of these disks sitting on > > my desk now collecting dust... > > There's this.. > http://www.silentpcreview.com/Terabyte_Drive_Fix > > and you can get the tool at.. > http://home.arcor.de/ghostadmin/wdidle3_1_00.zip > > I am planning to try this out tonight.. > > -- > Daniel O'Connor software and network engineer > for Genesis Software - http://www.gsoft.com.au > "The nice thing about standards is that there > are so many of them to choose from." > -- Andrew Tanenbaum > GPG Fingerprint - 5596 B766 97C0 0E94 4347 295E E593 DC20 7B3F CE8C >
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