Re: Hard disk slows linux system
hiya tal
On Wed, 14 May 2003, Tal Eisenberg wrote:
> and after configuring hdparm I got:
> /dev/hdb:
> Timing buffer-cache reads: 128 MB in 0.47 seconds =272.34 MB/sec
> Timing buffered disk reads: 64 MB in 3.96 seconds = 16.16 MB/sec
the only number you care about is "buffered disk reads"
> Is that resonable? these benchmarks are for a quite old 10GB HD but my new
> 120GB 8MB cache Western Digital drive was getting these results after
> enabling DMA:
>
> /dev/hda:
> Timing buffer-cache reads: 128 MB in 0.55 seconds =232.73 MB/sec
> Timing buffered disk reads: 64 MB in 1.74 seconds = 36.78 MB/sec
> which is not much faster...
you are getting double the read spead than before .. which is good
> I think the problem is solved but let me know if there's anything else to do.
to go even faster... or possible corrupt the fs if your disks or
bios doesnt support some of the options ...
try ... ( some older disks does NOT support all these options, while
most newer ones does )
hdparm -d1 -c3 -m16 -u1 /dev/hda
make sure your disk also has that sized multicount buffer
hdparm -iv /dev/hda | grep -i multi
c ya
alvin
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