On Saturday 18 August 2001 11:18, Terry C wrote: > --- civileme <[EMAIL PROTECTED]> wrote: > > You face yet another problem. There is --no ifs > > ands or buts-- a _hardware problem_ with the > > 686B southbridge, and another with the KT133A > > Northbridge. When our 8.0 kernel sees the chipset > > it will dive into crippled mode with DMA turned off. > > hdparm will report it turned on but you will > > be unable to burn CDRWs and CD-Rs and the behavior > > will be rather more sluggish than not. > > > > This is (halfway) fixed in our most recent kernel > > update, meaning we have a workaround for the > > _hardware_ bug, but not a high-performance one. > > Your computer will seem fairly normal, having > > jumped from 1.8Mb/S to 13.40Mb/s ide read speed as > > measured by the benchmark programs, but will be > > well below the expected benchmarks of 31.9 to 36.2 > > Mb/S as is usual for udma4 or udma5 operation. > > > > Civileme > > I'm very puzzled, I have an Abit KT7A raid, VIA KT133A > chipset, IBM IC35L020AVER07-0 20GB ATA100 hard drive, > AMD T-bird 1.2 GHz. Using hdparm, (I realize it's > maybe not the best hard drive benchmarking tool, but > it is the one most people have available) and I get > the following results doing hdparm -tT /dev/hde > > /dev/hde: > Timing buffer-cache reads: 128 MB in 0.78 seconds > =164.10 MB/sec > Timing buffered disk reads: 64 MB in 1.73 seconds = > 36.99 MB/sec > > I may be misunderstanding what you are saying, but my > performance seems pretty good to me. > > TC basically you have an off-board controller for your IDE. The ide0 and ide1 channels if you look at dmesg, probably are operating in PIO4 instead of DMA. The southbridge does not control ide channels 2 and up, usually. Civileme > > __________________________________________________ > Do You Yahoo!? > Make international calls for as low as $.04/minute with Yahoo! Messenger > http://phonecard.yahoo.com/ ---------------------------------------- Content-Type: text/plain; charset="us-ascii"; name="message.footer" Content-Transfer-Encoding: 8bit Content-Description: ----------------------------------------
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