[mythtv-users] Pundit-R SATA drive speed

[Fedor Pikus]

On 7/13/05, Mark Knecht <markknecht at gmail.com> wrote:
> Yeah. In my case these boxes are just front ends since the PVR family
> of cards don't really fit very well so I haven't cared very much about
> disk speed. If it was a back-end then I'd be a bit more concerned, but
> even 12MB/S will source a number of live streams so it shouldn't cause
> huge problems while we wait for someone to fix the driver.
> 
> Cheers,
> Mark

Seems rather slow for SATA. I've just finished replacing a PATA
soft-RAID with a SATA one in my desktop box, and I get write speeds
between 70 and 80 MB/s (RAID-5 and JFS).

> 
> On 7/13/05, cfactor <cfactor at usrsbin.net> wrote:
> > I've noticed that as well.  I'm also suspecting driver issues, but there
> > doesn't seem to be a whole lot of information regarding the SATA
> > controller on this board with linux out there.  I'll probably try
> > downloading the latest vanilla kernel later today to see if they have any
> > updates.
> >
> > ___
> >
> > John
> >
> > Prefer not to receive HTML mail? Click here.
> >
> >
> > On Wed, 13 Jul 2005, Mark Knecht wrote:
> >
> > > On 7/12/05, cfactor <cfactor at usrsbin.net> wrote:
> > >> Hi all.  I'm building a new myth backend.  I just got a pundit-r box.  I
> > >> have a WD SATA HD and IDE CD-ROM connected to it.  Running hdparm, I'm
> > >> only getting about 14MB/s.  DMA is turned on, different multcount options
> > >> don't seem to do much.  I've seen few reports of it online, but no
> > >> solution.  What kind of speed are other Pundit-R/SATA users getting?
> > >>
> > >> ___
> > >>
> > >> John
> > >
> > > John,
> > >   I'm getting about the same thing. 12MB/S if I don't mess with
> > > settings. Up to about 14MB/S if I do.
> > >
> > >   I did notice that my SATA drive doesn't report as many udma modes
> > > as my other drives and is hence set to a slower mode:
> > >
> > > myth12 ~ # hdparm -i /dev/hdc
> > >
> > > /dev/hdc:
> > >
> > > Model=WDC WD1600JD-00HBB0, FwRev=08.02D08, SerialNo=WD-WMAL93597321
> > > Config={ HardSect NotMFM HdSw>15uSec SpinMotCtl Fixed DTR>5Mbs FmtGapReq }
> > > RawCHS=16383/16/63, TrkSize=57600, SectSize=600, ECCbytes=74
> > > BuffType=DualPortCache, BuffSize=8192kB, MaxMultSect=16, MultSect=16
> > > CurCHS=16383/16/63, CurSects=16514064, LBA=yes, LBAsects=268435455
> > > 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
> > > UDMA modes: udma0 udma1 *udma2
> > > AdvancedPM=no WriteCache=enabled
> > > Drive conforms to: device does not report version:
> > >
> > > * signifies the current active mode
> > >
> > > myth12 ~ #
> > >
> > > Maybe there's somethign about the current ATI IGP chipset driver that
> > > doesn't do the best at getting speed out of the drives?
> > >
> > > - Mark
> > > _______________________________________________
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> > > mythtv-users at mythtv.org
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> > >
> >
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Fedor G Pikus (fpikus at gmail.com)
http://www.pikus.net
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