Messages in this thread | | | Date | Mon, 15 Mar 1999 16:17:33 -0600 (CST) | From | "Andre M. Hedrick" <> | Subject | Re: UDMA not supported on my board |
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Never fear a chipset code for tuning PIIX's is in the loop. Sheesh, if pronouce this phrase, it sounds like tweaking a fairy.
Seriously this is an ugly to reproduce in the same class as the PDC20246, since we are overriding a BIOS configuration.
Mark have you got a set of tuning rules based on the pci-config space? I have the rest of the code, just need the BIOS key to fill the blank.
On Mon, 15 Mar 1999, Mark Lord wrote:
> CaT wrote: > > > > Mark Lord wrote the following: > > > > > > CaT wrote: > > > > 37 e3 30 c0 bb 00 00 00 09 00 02 20 00 00 00 00 > > > > > > 37-e3 means PIO4/dma2 is setup for /dev/hda. > > > 30-c0 means slow timings for /dev/hdc. > > > bb means PIO4/dma2 is setup for /dev/hdb and /dev/hdd. > > > > > > The 09 means /dev/hda and /dev/hdd also have UDMA enabled. > > > The 02-20 means they both have UDMA mode2 selected, > > > which is the fastest mode. > > > > Unless I fuzzed up, hdparm reprts different: > ... > > Model=CD-ROM 32X/AKU, FwRev=U12I, SerialNo= > > Config={ SpinMotCtl Removeable DTR<=5Mbs DTR>10Mbs nonMagnetic } > > RawCHS=0/0/0, TrkSize=0, SectSize=0, ECCbytes=0 > > BuffType=0(?), BuffSize=0kB, MaxMultSect=0 > > DblWordIO=no, maxPIO=4(ata), DMA=yes, maxDMA=2(fast) > > (maybe): CurCHS=0/0/0, CurSects=0, LBA=yes, LBAsects=0 > > tDMA={min:120,rec:150}, DMA modes: *mword0 mword1 mword2 > > IORDY=on/off, tPIO={min:227,w/IORDY:120}, PIO modes: mode3 mode4 > > UDMA modes: *mode0 mode1 mode2 > > > > The * means it's using THAT one, no? > > Yes, the '*' means that the DRIVE is trying to use that mode. > > In this case, it looks like the drive and the chipset disagree > on modes, so UDMA probably won't work very well on the cdrom. > > You can try: hdparm -X66 -d1 /dev/hdd > which will place the cdrom into UDMA mode2. > > ??? > -- > mlord@pobox.com >
Andre Hedrick The Linux IDE guy -- http://www.dyer.vanderbilt.edu/server/udma/
APC UPS Daemon Support Center. http://www.brisse.dk/site/apcupsd/ Going FSF/GNU or GPL2 source soon.
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