[techtalk] hdparm and DMA "not permitted"

[Conor Daly]

Little problem here with hdparm and DMA.  I'm using an AMD K6-2 350MHz on
some kind of amibios mobo with "Ultra DMA Enabled" in CMOS but I cannot
set "using dma" for the drive(s).

[root]# /sbin/hdparm -d 1 /dev/hda

/dev/hda:
 setting using_dma to 1 (on)
 HDIO_SET_DMA failed: Operation not permitted
 using_dma    =  0 (off)


dmesg returns:

PCI_IDE: unknown IDE controller on PCI bus 00 device 78, VID=10b9,
DID=5229
PCI_IDE: not 100% native mode: will probe irqs later
PCI_IDE: simplex device:  DMA disabled
ide0: PCI_IDE Bus-Master DMA disabled (BIOS)
PCI_IDE: simplex device:  DMA disabled
ide1: PCI_IDE Bus-Master DMA disabled (BIOS)
hda: Maxtor 91021U2, ATA DISK drive
hdb: FUJITSU MPD3084AT, ATA DISK drive
hdc: ATAPI 52X CDROM, ATAPI CDROM drive
hdd: PHILIPS CDD3610 CD-R/RW, ATAPI CDROM drive
ide0 at 0x1f0-0x1f7,0x3f6 on irq 14
ide1 at 0x170-0x177,0x376 on irq 15
hda: Maxtor 91021U2, 9770MB w/512kB Cache, CHS=1245/255/63
hdb: FUJITSU MPD3084AT, 8063MB w/512kB Cache, CHS=1027/255/63

Any thoughts?

Conor
-- 
Conor Daly <conor.daly at oceanfree.net>

Domestic Sysadmin :-)
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