Sounds like DMA is not enabled for some reason. I've noticed that if you use an add-on IDE pci adapter, sometimes you have to use hdparm to turn dma on. /sbin/hdparm -i /dev/hda This will show you what modes the drive supports and it should have a "*" next to the mode that it's running in. For some reason, mine only shows up to udma2, but I know it supports udma5. The -X option sets the mode. -X66 is udma2, -X67 is udma3, -X68 is udma4 and -X69 is udma5 (ata-100). So if you have ata-100, you can try this: /sbin/hdparm -d1 -X69 /dev/hda You'll have to do this on every boot, so whack it into an rc script or something. Jay On Thursday, October 3, 2002, at 01:24 PM, Justin Kremer wrote: > I just moved my system from a SCSI drive to an IDE drive. (I know I'm > moving the wrong direction for performance, but I don't care about that > right now) > All seemed to work out fine. After a bit ot troubleshooting and > playing > trick-the-grub a bit my system boots and the bootloader even points to > a > kernel that exists. Now my problem is that since the HDD swap, > whenever I > have moderate HDD usage, my CPU usage goes to 100%. > So far this is what I know: > motherboard: soltek SL75DRV2 / Abit KT7 (both thunderbird processors > with > VIA chipsets) > hard drive: IBM 07N9210 (80 gig 7200 rpm IDE) / Maxtor 40 gig 7200 rpm > IDE > (model 6L040J2 ?) > running EXT3 on the drives. behaves the same when the filesystems are > mounted as EXT2. > running debian with kernel 2.4.19 > I tried installing RH7.3 with kernel 2.4.18-10 onto one of the drives > and > it does not have the same problem there. I would, however, like to > contine using debian without having to reinstall the system. > Any ideas of what would be causing this behavior? > TIA, > - Kremer > _______________________________________________ > Twin Cities Linux Users Group Mailing List - Minneapolis/St. Paul, > Minnesota > http://www.mn-linux.org > tclug-list at mn-linux.org > https://mailman.mn-linux.org/mailman/listinfo/tclug-list