[ltp] hdparm params for 7k60 drive

[Steve Barr]

Brad Langhorst wrote:
> thought these settings might save somebody some time when setting up
> this drive (7200rpm travelstar)
> hdparm -v /dev/hda
> /dev/hda:
>  multcount    =  1 (on)
>  IO_support   =  1 (32-bit)
>  unmaskirq    =  1 (on)
>  using_dma    =  1 (on)
>  keepsettings =  1 (on)
>  readonly     =  0 (off)
>  readahead    = 256 (on)
>  geometry     = 16383/255/63, sectors = 117210240, start = 0
> 
> hdparm -c 1 -d 1 -m 1 -u 1 /dev/hda
> 
> which yields these results
> 
> hdparm -T /dev/hda
> /dev/hda:
>  Timing buffer-cache reads:  1416 MB in  2.00 seconds = 706.34 MB/sec
> 
> hdparm -t /dev/hda
> /dev/hda:
>  Timing buffered disk reads:  112 MB in  3.03 seconds =  36.93 MB/sec

Thanks for posting; I wouldn't have played around with this otherwise.
For some reason I could not set readahead to 256:
/dev/hda:
  setting fs readahead to 256
  BLKRASET failed: Invalid argument

So I set it to 192:
  readahead    = 192 (on)

With these results:
hdparm -tT /dev/hda

/dev/hda:
  Timing buffer-cache reads:   1616 MB in  2.01 seconds = 803.98 MB/sec
  Timing buffered disk reads:  112 MB in  3.00 seconds =  37.33 MB/sec

Perhaps there is an even better setting waiting to be discovered...

I'm running RH9 on a T40p in case that matters.

Thanks again,

Steve
-- 
http://www.stevebarr.com
"Your lips should remain unmoved."
All 100% my own opinions.