hdd lacks performance

**robak** · 03-08-2004

Hi all!

i have a new seagate SATA hdd but if i copy large files (about 700MB) i got only 12 Mb/sec.
but i should be at least 20 or 25 cuz the read performance is about 50 Mb/sec and the write performance is about 40 Mb/sec.

does anybody know whats wrong?

btw.: i got a 2.6.3 kernel if that helps a little bit

**kriss** · 03-08-2004

Is (u)dma enabled? Check with hdparm /dev/hdXX

Good luck

**fingal** · 03-08-2004

I think the command you (might) need is hdparm -d1 /dev/myhardrive... This last bit might be hda1 or something similar.

**robak** · 03-08-2004

dma is on and here's what hdparm says

Code:

/dev/hde

multcount         = 16 &#40;on&#41;
IO_support      = 0 &#40;default 16-bit&#41;
unmaskirq         = 0 &#40;off&#41;
using_dma        = 1 &#40;on&#41;
keepsettings     = 0 &#40;off&#41;
readonly           = 0 &#40;off&#41;
readahead        = 256 &#40;on&#41;
geometry          = 19457 / 255 / 63, sectors = 312581808, start = 0

hdparm -t /dev/hde1
  Timing buffered disk reads&#58;   52 MB in 3.10 seconds = 16.80 MB/sec

i hope this can help a little bit.

**robak** · 03-10-2004

is there a prob with the kernel?

cuz i get the following info aon boot time:

hde MMIO=pio

is this normal ?

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