El Dom 14 Abr 2002 06:11, Guy Zelck escribió: > Jose M. Sanchez wrote: > >Just to chime in on this subject... > > > >The AliMagic and VIA based motherboards have "broken" chipsets. > > > >I've spoken to both companies engineers about this issue. > > > >This discussion arose because both chipsets have problems with DMA > >overlays when using the BT8xx type TV tuner cards... > > > >The problem is with clock timing (the famous broken clock timer chip!!!) > >and DMA xfers. As you push the udma speed the spurious clock pulses > >wreak havoc with the memory writes. > > > >The Windows drivers try to make the OS work around the problem... > > > >This may be why people are seeing corruption. Couple this with Civilme's > >statement on WD drives and lack of CRC DMA data checking, and it's a > >wonder that Linux even runs on these systems. > > > >Turning OFF DMA or reducing UDMA to 33 seems to help with this > >problem... > > > >Your milage may vary though... > > > >-JMS > > Hi, > > Valuable input. I've got an Intel chipset but indeed a bttv tv tuner and > a Firewire card from VIA technologies and suffer the same problems. > > Guy.
just for the record. i've read Civileme's opinion abou WD drives. he scared me a bit, since i installed linux on a 30 GB WD drive and i can't afford to buy another.. so i just said "tha heck with it, i'll use linux in this one till it dies or something..." that was a year ago. i'm still on my WD drive. i have /dev/hdb5 / ext3 defaults 1 1 /dev/hdb2 /boot ext2 defaults 1 2 none /dev/pts devpts mode=0620 0 0 none /dev/shm tmpfs defaults 0 0 /dev/hdb6 /home xfs defaults 1 2 /mnt/cdrom /mnt/cdrom supermount dev=/dev/scd0,fs=iso9660,ro,--,iocharset=iso8859-1 0 0 /mnt/cdrom2 /mnt/cdrom2 supermount dev=/dev/hdd,fs=iso9660,ro,--,iocharset=iso8859-1 0 0 /mnt/floppy /mnt/floppy supermount dev=/dev/fd0,fs=vfat,--,iocharset=iso8859-1,umask=0,sync,codepage=850 0 0 /dev/hdb7 /mnt/win_d vfat iocharset=iso8859-1,umask=0,codepage=850 0 0 /dev/hda1 /mnt/windows vfat iocharset=iso8859-1,umask=0,codepage=850 0 0 /dev/hda5 /opt ext3 defaults 1 2 none /proc proc defaults 0 0 /dev/hdb8 swap swap defaults 0 0 hdb being the mentioned WD drive. as you see, i use several filesystems. i've experienced power failures, hard freezes forcing me to push the reset button. you know.. the usual. and i'm still waiting for the day i get one single file corrupted.....
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