That's more like what we were expecting! I can't tell you why its like that or how, but this *is* the typical problem with IDE. Most likely the chipset is being detected incorrectly, or its being detected correctly but there is some errata that's disabling dma, or maybe dma is experimental for the card. Places to look for information are in the dmesg for the sis chipset's detection diagnostics, then on the internet as a google for your sis chipset number then "linux dma" maybe. You may end up with some ide things on your kernel command line (via grub or lilo) I'll reiterate something I said previously though, other than write-caching (which is potentially dangerous) none of the other hdparm or IDE settings are really going to give you that much of a boost unless your workload is specifically tunable. They're all just little minor twiddles you can do - nothing even close to the difference between having DMA or not. So I'd just focus on enabling DMA. The other stuff is all uninteresting compared to it. -Mike Jay Strauss wrote: > Hi (again): > > I diff'ed the contents of /proc/ide of Knoppix and Sarge, there were a > couple of (possibly) interesting differences. I'm not sure how to go > about changing the settings. The net/net is on my controller under > knoppix it says UDMA Enabled but on Sarge it's disabled. Also the > writecache is enabled under knoppix (I did a hdparm -W 1 /dev/hda, but > my tests were identical) > > Below are the diffs, I'd like to make the sarge install setting > identical, and see if that changes anything. > > If anyone knows how to alter these settings, I'd be appreciated > > thanks > Jay > > jstrauss@hydrogen:~$ diff -r sarge.ide/sis knoppix.ide/sis > 10,11c10,11 > < UDMA Enabled UDMA Enabled > < UDMA Cycle Time 2 CLK UDMA Cycle Time 4 CLK > --- >> UDMA Disabled UDMA Disabled >> UDMA Cycle Time Reserved UDMA Cycle Time Reserved > > and > jstrauss@hydrogen:~$ diff sarge.ide/hda/settings knoppix.ide/hda/settings > 7a8 >> breada_readahead 8 0 255 rw > 9c10 > < current_speed 68 0 > 70 rw > --- >> current_speed 12 0 70 rw > 11c12,13 > < init_speed 68 0 > 70 rw > --- >> file_readahead 124 0 16384 rw >> init_speed 12 0 70 rw > 16c18,19 > < multcount 0 0 > 16 rw > --- >> max_kb_per_request 128 1 255 rw >> multcount 16 0 16 rw > 20a24 >> slow 0 0 1 rw > 23c27 > < wcache 1 0 > 1 rw > --- >> wcache 0 0 1 rw > - > To unsubscribe from this list: send the line "unsubscribe linux-raid" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html - To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
