Arch Linux

tom96

Member

From: Germany

Registered: 2006-12-19

Posts: 7

Slow HDD, hdparm

My harddrive is very slow :

hdparm -tT /dev/hda :
/dev/hda:
Timing cached reads:   468 MB in  2.00 seconds = 233.74 MB/sec
Timing buffered disk reads:  188 MB in  3.00 seconds =  62.62 MB/sec

DMA is ok:

hdparm -iv /dev/hda | grep dma :
using_dma    =  1 (on)
DMA modes:  mdma0 mdma1 mdma2
UDMA modes: udma0 udma1 udma2 udma3 udma4 udma5 udma3 udma4 udma5 *udma6

With the Ubuntu Live CD I get more than the double of 468MB. Why?

tom96

Member

From: Germany

Registered: 2006-12-19

Posts: 7

Re: Slow HDD, hdparm

I tried to find the difference between the settings in Archlinux and Ubuntu. The only thing I found:
hdparm -I /dev/hda
Archlinux:
Configuration:
        Logical         max     current
        cylinders       16383   65535
        heads           16      1
        sectors/track   63      63
Ubuntu:
Configuration:
        Logical         max     current
        cylinders       16383   16383
        heads           16      16
        sectors/track   63      63
What does this mean?

byte

Member

From: Düsseldorf (DE)

Registered: 2006-05-01

Posts: 2,046

Re: Slow HDD, hdparm

Forget about "cached reads" and just run 'hdparm -t' (and maybe try --direct too).

More than 60 MB/s are certainly not 'slow'.

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1000

tom96

Member

From: Germany

Registered: 2006-12-19

Posts: 7

Re: Slow HDD, hdparm

Thank you byte, oder besser Danke
Schöne Grüße aus Hannover