Ok Ok but how do you test the speeds of your drives?
My drive supports
Model=Maxtor 92720U8, FwRev=MA540RR0, SerialNo=C803RN7C
Config={ Fixed }
RawCHS=16383/16/63, TrkSize=0, SectSize=0, ECCbytes=57
BuffType=DualPortCache, BuffSize=2048kB, MaxMultSect=16, MultSect=16
CurCHS=16383/16/63, CurSects=16514064, LBA=yes, LBAsects=53177040
IORDY=on/off, tPIO={min:120,w/IORDY:120}, tDMA={min:120,rec:120}
PIO modes: pio0 pio1 pio2 pio3 pio4
DMA modes: mdma0 mdma1 mdma2 udma0 udma1 udma2 udma3 udma4
so.. UDMA 4 is the fastest... I dont know what I am running
at right now.. is this told in the above information?
I mainly want to know if there is a way to benchmark your
throughput...
Thanks.
Chrisopher Campbell
On Mon, 19 Jun 2000, you wrote:
> Did you do it specifiying both flags at the same time?
>
> What -Xxx value did you use?
>
> First query your drive with "hdparm -i /dev/hda" to
> see what modes your drive support.
>
> From the hdparm man page:
>
> ...
>
> -X Set the IDE transfer mode for newer
> (E)IDE/ATA2
> drives. This is typically used in
> combination with
> -d1 when enabling DMA to/from a drive
> on a sup<AD>
> ported interface chipset (such as the
> Intel 430FX
> Triton), where -X34 is used to select
> multiword DMA
> mode2 transfers. With systems which
> support Ultra<AD>
> DMA burst timings, -X66 is used to
> select UltraDMA
> mode2 transfers (you'll need to prepare
> the chipset
> for UltraDMA beforehand). Apart from
> that, use of
> this flag is seldom necessary since
> most/all modern
> IDE drives default to their fastest
> PIO transfer
> mode at power-on. Fiddling with this
> can be both
> needless and risky. On drives which
> support alter<AD>
> nate transfer modes, -X can be used to
> switch the
> mode of the drive only. Prior to
> changing the
> transfer mode, the IDE interface should
> be jumpered
> or programmed (see -p flag) for the new
> mode set<AD>
> ting to prevent loss and/or
> corruption of data.
> Use this with extreme caution! For the
> PIO (Pro<AD>
> grammed Input/Output) transfer modes
> used by Linux,
> this value is simply the desired PIO
> mode number
> plus 8. Thus, a value of 09 sets
> PIO mode1, 10
> enables PIO mode2, and 11 selects PIO
> mode3. Set<AD>
> ting 00 restores the drive's
> "default" PIO mode,
> and 01 disables IORDY. For multiword
> DMA, the
> value used is the desired DMA mode
> number plus 32.
> for UltraDMA, the value is the
> desired UltraDMA
> mode number plus 64.
>
> ...
>
> It says that most modern drives default to the fastest
> mode; he, he, he, I had always have to use hdparm to
> get an average of only *twice* the default performance
> with all the drives I have ever had. ;-)
>
> --- Pixel <[EMAIL PROTECTED]> wrote:
> > "bobby dowling" <[EMAIL PROTECTED]> writes:
> >
> > > What do you mean the -d flag without the -X flags?
> > >
> > > So, you can say -dX and those WD drives that froze
> > the system before would
> > > work?
> >
> > nope, froze anyway here :(
> >
>
>
> =====
> ________________________
> Eugenio Diaz, BSEE/BSCE
> Linux Engineer
> [EMAIL PROTECTED]
>
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