Tom Brinkman wrote:
>
> On Mon, 04 Oct 1999, you wrote:
> > Tom Brinkman wrote:
> > >
> > > /dev/hdb: [8.4g WD Caviar, Mdk 6.0 and swap are on the first 3g's.
> > > Timing buffer-cache reads: 128 MB in 1.01 seconds =126.73 MB/sec
> > > Timing buffered disk reads: 64 MB in 12.62 seconds = 5.07 MB/sec
>
> Steve:
> > Run: hdparm -m16 -c1 -u1 -d1 -k1 -a128 /dev/hdb
> >
> > If it goes without error, put it at the end of /etc/rc.d/rc.local.
> >
> > The command will setup 16 sectors for multi-sector transfer, turn on
> > 32bit interface support, turn on interrupt masking (will allow other
> > interrupts to be serviced while hard drive is busy), turn on DMA
> > transfers, set the drive to keep these settings over a reset and set
> > filesystem readahead to 128 sectors.
> >
> > After running this, rerun the hdparm -tT a few times to see what the new
> > rates are. If they still seem low, tweak the -m and -a values.
>
> I used Steve's suggestion, only modified by a note I found in
> 'info hdparm' for the '-m' setting:
[snip]
> now it benches: hdparm -tT
> /dev/hdb:
> Timing buffer-cache reads: 128 MB in 0.94 seconds =136.17 MB/sec
> Timing buffered disk reads: 64 MB in 6.04 seconds =10.60 MB/sec
>
> That's about a 5% increase in buffer reads, but a whopping
> 209% increase in disk reads. It's very much apparent in how fast
> programs like StarOffice and Netscape load... _twice as fast_ than
> before Steve's suggested HDD optimization.
>
> Thank's again Steve. What else ya got?? ;-)
Tom,
Excellent work! I'll be playing with some of the suggestions that you
used on the -m switch to see if I can get a bit more output of my
drive. There's always a bit more tweaking to be done. :)
Next up, serial tweaking! (gimme a little time on that one, I'm outta
town!)
--
Steve Philp
Network Administrator
Advance Packaging Corporation
[EMAIL PROTECTED]
