immense delayed write to file system (ZFS and UFS2), performance issues

[Garrett Moore]

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 timeouts
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 out
-- 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 at gsoft.com.au>wrote:

> On Tue, 19 Jan 2010, Morgan Wesström 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
>