Red Hat Bugzilla – Bug 53568
Kernel fails to use UDMA66 when explicitly asked to.
Last modified: 2008-08-01 12:22:51 EDT
HPT366 IDE controller on BP6 motherboard with FUJITSU MPE3136AT IDE drive. Has worked perfectly for some time at UDMA66 speeds, with either CONFIG_IDEDMA_IVB set or 'ide4=ata66' on the commandline to tell it to assume that it's got an 80-ribbon cable plugged in (which it has). The Roswell kernel falls back to UDMA33, though. No messages saying why. ide: Assuming 33MHz PCI bus speed for PIO modes; override with idebus=xx PIIX4: IDE controller on PCI bus 00 dev 39 PIIX4: chipset revision 1 PIIX4: not 100% native mode: will probe irqs later ide0: BM-DMA at 0xf000-0xf007, BIOS settings: hda:pio, hdb:pio ide1: BM-DMA at 0xf008-0xf00f, BIOS settings: hdc:pio, hdd:pio PCI_IDE: unknown IDE controller on PCI bus 00 device 49, VID=8086, DID=1222 PCI: Device 00:09.1 not available because of resource collisions PCI_IDE: chipset revision 2 PCI_IDE: not 100% native mode: will probe irqs later PCI_IDE: port 0x01f0 already claimed by ide0 PCI_IDE: port 0x0170 already claimed by ide1 PCI_IDE: neither IDE port enabled (BIOS) PDC20267: IDE controller on PCI bus 00 dev 58 PDC20267: chipset revision 2 PDC20267: not 100% native mode: will probe irqs later PDC20267: (U)DMA Burst Bit ENABLED Primary PCI Mode Secondary PCI Mode. ide2: BM-DMA at 0xa800-0xa807, BIOS settings: hde:DMA, hdf:DMA ide3: BM-DMA at 0xa808-0xa80f, BIOS settings: hdg:DMA, hdh:DMA HPT366: onboard version of chipset, pin1=1 pin2=2 HPT366: IDE controller on PCI bus 00 dev 98 HPT366: chipset revision 1 HPT366: not 100% native mode: will probe irqs later HPT366: ATA-66/100 forced bit set (WARNING)!! ide4: BM-DMA at 0xb800-0xb807, BIOS settings: hdi:pio, hdj:pio HPT366: IDE controller on PCI bus 00 dev 99 HPT366: chipset revision 1 HPT366: not 100% native mode: will probe irqs later ide5: BM-DMA at 0xc400-0xc407, BIOS settings: hdk:pio, hdl:pio hda: SAMSUNG SV0432D, ATA DISK drive hdc: Pioneer DVD-ROM ATAPIModel DVD-103S 011, ATAPI CD/DVD-ROM drive hde: IBM-DTLA-307045, ATA DISK drive hdi: FUJITSU MPE3136AT, ATA DISK drive ide0 at 0x1f0-0x1f7,0x3f6 on irq 14 ide1 at 0x170-0x177,0x376 on irq 15 ide2 at 0x9800-0x9807,0x9c02 on irq 18 ide4 at 0xb000-0xb007,0xb402 on irq 18 hda: 8421840 sectors (4312 MB) w/480KiB Cache, CHS=8912/15/63, UDMA(33) hde: 90069840 sectors (46116 MB) w/1916KiB Cache, CHS=89355/16/63, UDMA(100) hdi: 26688576 sectors (13665 MB) w/512KiB Cache, CHS=26476/16/63, UDMA(33) ide-floppy driver 0.97 Partition check: hda: hda1 hda2 hde: hde1 hde2 hde3 hde4 < hde5 hde6 hde7 > hdi: hdi1 hdi2 hdi3 < hdi5 hdi6 hdi7 hdi8 hdi9 hdi10 >
Still in 7.2 erratum kernel (2.4.9-7smp).
Rawhide has the new IDE code
Problem still exists. Whatever the reason for falling back to UDMA33 is, something should be printed at startup to explain it.
Thanks for the bug report. However, Red Hat no longer maintains this version of the product. Please upgrade to the latest version and open a new bug if the problem persists. The Fedora Legacy project (http://fedoralegacy.org/) maintains some older releases, and if you believe this bug is interesting to them, please report the problem in the bug tracker at: http://bugzilla.fedora.us/