[MPlayer-users] problems playing back most dvd's

Charles Blackburn charlesb at summerfield-technology.co.uk
Fri Apr 18 15:14:57 CEST 2003

So it looks like it's using dma but how can i make sure that it is?


thunder root # hdparm -iI /dev/hdc


 Model=HITACHI DVD-ROM GD-2500, FwRev=0101, SerialNo=
 Config={ Fixed Removeable DTR<=5Mbs DTR>10Mbs nonMagnetic }
 RawCHS=0/0/0, TrkSize=0, SectSize=0, ECCbytes=0
 BuffType=unknown, BuffSize=0kB, MaxMultSect=0
 (maybe): CurCHS=0/0/0, CurSects=0, LBA=yes, LBAsects=0
 IORDY=on/off, tPIO={min:120,w/IORDY:120}, tDMA={min:120,rec:120}
 PIO modes:  pio0 pio1 pio2 pio3 pio4 
 DMA modes:  sdma0 sdma1 sdma2 mdma0 mdma1 *mdma2 

ATAPI CD-ROM, with removable media
        Model Number:       HITACHI DVD-ROM GD-2500                 
        Serial Number:      
        Firmware Revision:  0101    
        Likely used CD-ROM ATAPI-1
        DRQ response: 50us.
        Packet size: 12 bytes
        LBA, IORDY(can be disabled)
        DMA: sdma0 sdma1 sdma2 mdma0 mdma1 *mdma2 
             Cycle time: min=120ns recommended=120ns
        PIO: pio0 pio1 pio2 pio3 pio4 
             Cycle time: no flow control=120ns  IORDY flow control=120ns

On Fri, 18 Apr 2003 15:40:31 +0400 (MSD)
Vladimir Mosgalin <mosgalin at VM10124.spb.edu> wrote:

> [Automatic answer: RTFM (read DOCS, FAQ), also read
> DOCS/bugreports.html] On Fri, 18 Apr 2003, Charles Blackburn wrote:
> CB>thunder root # hdparm /dev/hdc
> You should check hdparm -iI /dev/hdc as well, -d1 just _allows_ to set
> dma, maybe your drive is still in pio mode...
> If everything is correct, you will see something like
> 'UDMA modes: udma0 udma1 *udma2'. After that you can get raw read
> speed using hdparm -t /dev/hdc. This won't be correct, however, e.g.
> for me it shows half of the real speed...
> -- 
> Vladimir
> _______________________________________________
> RTFM!!!  http://www.MPlayerHQ.hu/DOCS
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