Il lun, 2003-11-17 alle 17:06, Craig Tierney ha scritto:
> > Unfortunately it gives me slow performance (sequential read of 30mb/sec on
> > a
> > seagate 318452fc that can do 60mb/sec sequential read).
> >
>
> What is your write performance? Have you tried
> to tune /proc/sys/vm/{min,max}-readahead?
I have tuned readahead and not it goes 50 mb.
I am shocked, why I need to tune it?
Usually I do an hdparm -t -T to see if hard disk is good
(and eventually hdparm again to tune ide interface)
Without tuning I can reach sequential read of more than 60 mb using raid0.
I do not understand why the OS cannot use the full speed of this FC drive.
OTOH side I discovered that (in a raid1 array ) the two seagate write speed is
very low: 10mb/s, why?
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