[Hudlug] A hdparm Tweaking Guide

[Les Burns]

Rob check this out:

/dev/hdb:
 Timing buffer-cache reads:   128 MB in  0.57 seconds =224.56 MB/sec
 Timing buffered disk reads:  64 MB in  1.46 seconds = 43.84 MB/sec

Whooshhh!

Just which rc script do save the hdparm string to under RH7.3?


On Fri, 2002-09-06 at 12:35, Rob Shakir wrote:
> Hi,
> 
> Thats basically because the DMA settings havent been enabled, mine was running at that speed until I tweaked it, if we had SSH at school I could show you how well its doing now :)
> 
> Aint that 60GXP died on you yet?
> 
> Shak
> > 
> > From: Les Burns <l.burns@btclick.com>
> > Date: 06 Sep 2002 12:19:01 +0100
> > To: hudlug@mailman.lug.org.uk
> > Subject: Re: [Hudlug] A hdparm Tweaking Guide
> > 
> > it appears I need to do some serious tweaking (just never got round to
> > doing this ;)) My IBM 60GXP reports:
> > 
> > /dev/hdb:
> >  Timing buffer-cache reads:   128 MB in  0.57 seconds =224.56 MB/sec
> >  Timing buffered disk reads:  64 MB in 18.02 seconds =  3.55 MB/sec
> > 
> > 
> > 3.55mb/ sec- surely not! But the sysy
> > 
> > 
> > On Fri, 2002-09-06 at 12:07, Rob Shakir wrote:
> > > A Guide to Hard Disk Tweaking
> > > 
> > > When you run the "hdparm -tT" command you can see the current I/Os from your hard drive benchmarked. 
> > > 
> > > First run hdparm -tT as root and see what scores you get, preferably post them so I can see how much difference it makes!
> > > 
> > > There are ways to improve these scores, the best being:
> > > 
> > > 32bit accessing (c)
> > > 
> > > DMA (d)
> > > 
> > > Multiple sector count (m)
> > > 
> > > 
> > > 
> > > To enable these:
> > > 
> > > 
> > > hdparm -c 1 -d 1 -m 16 /dev/xxx
> > > 
> > > Where /dev/xxx is your hard drive 
> > > 
> > > Another important option is the enabling of UDMA 33/66/100. 
> > > 
> > > Add the -X option, and then this number i.e. (-X 69)
> > > 
> > > 
> > > 
> > > X 33 = Multiword DMA
> > > 
> > > X 66 = ATA-33 (UDMA2)
> > > 
> > > X 68 = ATA-66 (UDMA4)
> > > 
> > > X 69 = ATA-100 (UDMA 5)
> > > 
> > > 
> > > 
> > > People have asked me about ATA-133, Im afraid I dont know how to enable this!
> > > 
> > > Now, enable the -k 1 option, to allow the settings to be kept over a reboot.
> > > 
> > > add the whole line to your /etc/rc.local/local.start (in gentoo) to allow these tweaks on bootup.
> > > 
> > > Happy tweaking! 
> > > 
> > > Shak
> > > 
> > > robshakir
> > > MSN:neovolt@hotmail.com
> > > ICQ:137870119 
> > > AIM: II neovolt II
> > > Yahoo!: robshakir
> > > 
> > > 
> > > _______________________________________________
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> > 
> > 
> > 
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> > 
> 
> Shak - Rob Shakir
> "Testing? What's that? If it compiles, it is good, if it boots up it is perfect." - Linus Torvalds
> msn - fsck@hotmail.com
> 
> 
> 
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