[ltp] hdparm settings?

[Eric Van Buggenhaut]

On Fri, Feb 18, 2005 at 02:25:07AM -0700, Nathan Kurz wrote:
> On Fri, Feb 18, 2005 at 03:54:35PM +0800, Senectus . wrote:
> > Do any of you guys play with your hdparm settings?
> > If so what would you consider "safe" tweaks...?
> 
> I haven't done much playing with my current laptop (an X30) but I've
> done so in the past.  My general conclusions (for older models using
> much older kernels) were pretty simple.  I'm still going by those
> simple conclusions with pretty good results.
> 
> 1) Make sure you are using DMA to transfer (-d 1)
> 2) Set the sleep spindown to what you want (-S 12 for me)
> 3) Test with 'hdparm -t /dev/hda' to confirm nothing horribly wron.
> 4) The rest will probably be autosensed correctly.
> 
> This is what I currently get on the X30 with a 40 Gig drive:
> # hdparm -t /dev/hda
> /dev/hda:
>  Timing buffered disk reads:   60 MB in  3.05 seconds =  19.67 MB/sec
> 

That's pretty nice: with a 60GB disk at 7200RPM on my T42 I only get:

atto:/home/eric[0]# hdparm -t /dev/hda

/dev/hda:
 Timing buffered disk reads:   38 MB in  3.02 seconds =  12.58 MB/sec
atto:/home/eric[0]# hdparm  /dev/hda

/dev/hda:
 multcount    =  0 (off)
 IO_support   =  1 (32-bit)
 unmaskirq    =  0 (off)
 using_dma    =  1 (on)
 keepsettings =  0 (off)
 readonly     =  0 (off)
 readahead    = 256 (on)
 geometry     = 65535/16/63, sectors = 60011642880, start = 0

-- 
"Un disco para gobernarlos a todos.
 Un disco para encontrarlos y atarlos en las tinieblas.
 En la tierra de Redmond donde se extienden las sombras"

Eric VAN BUGGENHAUT
eric@sindominio.net