I can't answer all your questions, but I can tell you how to learn what DMA mode Linux is using. Use the dmesg command to display your console boot messages, and search for "UDMA" in those messages. For example, I see this on tivopc.
> [bmiller@tivopc latest]$ dmesg | grep ^hd.: > hda: QUANTUM FIREBALLlct15 30, ATA DISK drive > hdb: IBM-DTLA-305040, ATA DISK drive > hdc: LTN301, ATAPI CD/DVD-ROM drive > hde: WDC WD800JB-00CRA1, ATA DISK drive > hdg: WDC WD800JB-00CRA1, ATA DISK drive > hda: 58633344 sectors (30020 MB) w/418KiB Cache, CHS=58168/16/63, UDMA(66) > hdb: 80418240 sectors (41174 MB) w/380KiB Cache, CHS=79780/16/63, UDMA(100) > hde: 156301488 sectors (80026 MB) w/8192KiB Cache, CHS=155061/16/63, UDMA(100) > hdg: 156301488 sectors (80026 MB) w/8192KiB Cache, CHS=155061/16/63, UDMA(100) So three of the disks are in UDMA 100 mode, and one is in UDMA 66. BTW, since Monday, I've had a very nice IDE RAID 0 on this box, thanks to Mr. O and ComputerBase. -- Bob Miller K<bob> kbobsoft software consulting http://kbobsoft.com [EMAIL PROTECTED] _______________________________________________ Eug-LUG mailing list [EMAIL PROTECTED] http://mailman.efn.org/cgi-bin/listinfo/eug-lug
