Messages in this thread |  | | Date | Mon, 5 May 2003 19:26:52 +0200 | From | Stephan von Krawczynski <> | Subject | Re: ISDN massive packet drops while DVD burn/verify |
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On Mon, 5 May 2003 18:46:53 +0200 Karsten Keil <kkeil@suse.de> wrote:
> > How did we manage to become that bad? > > Its not so bad, the problem is how do you tune the system. If you prefer to > not interrupt the IDE transfers, which seems to be the default case, you > loose IRQ latency, which doesn't matter in much cases, but not on > this. You can tune it (hdparm work also with cdwriters, since > even if it use ide-scsi, the underlying driver is the ide driver.
You mean UDMA 2 does not make it (which I had in the test case)?
# hdparm -i /dev/hdc
/dev/hdc:
Model=SONY DVD RW DRU-500A, FwRev=2.0c, SerialNo=DA5B9D3D 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:180,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 Drive conforms to: device does not report version: 4 5 6
> This all don't say that here maybe also other problems around, but I have no > better explanation.
Hm, this looks like the unresolved sleeping AVM Fritz2 syndrome to me: no idea of what's really going on ...
-- Regards, Stephan - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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