Re: hdparm: invalidate: busy buffer
On Sun, 2002-12-08 at 17:23, Pigeon wrote:
> On Sun, Dec 08, 2002 at 04:36:09PM -0500, Neal wrote:
>
> > What does hdparm without any switches report?
> >
> > Here's mine:
> >
> > hdparm /dev/hda
> >
> > /dev/hda:
> > multcount = 16 (on)
> > I/O support = 1 (32-bit)
> > unmaskirq = 1 (on)
> > using_dma = 1 (on)
> > keepsettings = 0 (off)
> > nowerr = 0 (off)
> > readonly = 0 (off)
> > readahead = 8 (on)
> > geometry = 3739/255/63, sectors = 60074784, start = 0
> > busstate = 1 (on)
>
> Mine's identical, apart from the geometry (of course).
>
Could this be a hardware or connecting cable problem? The transfer
speeds you reported are far slower than what one might expect from a
UDMA66 hard drive.
My desktop has a Western Digital UDMA66 drive and a VIA 82C686A
controller. hdparm reports:
hdparm -tT /dev/hda2
/dev/hda2:
Timing buffer-cache reads: 128 MB in 1.15 seconds =111.30 MB/sec
Timing buffered disk reads: 64 MB in 2.64 seconds = 24.24 MB/sec
It doesn't matter which partition is interrogated, the average reports
are all about the same 24MB/sec +/- a few hundred K.
--
Neal
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