DMA/UDMA on an ACER TM 342
I'm having problems in enabling DMA on my lap...
some detail:
dmesg gives:
[...]
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: HITACHI_DK23AA-90, ATA DISK drive
ide0 at 0x1f0-0x1f7,0x3f6 on irq 14
hda: HITACHI_DK23AA-90, 8623MB w/512kB Cache, CHS=1099/255/63
Floppy drive(s): fd0 is 1.44M
FDC 0 is a National Semiconductor PC87306
[...]
- what does DMA disabled (BIOS) means? On my BIOS I wasn't able to find
anything on HD DMA... also, my HD it is not in the DMA blacklist....
"hdparm -I /dev/hda" reads:
Model=IHATHC_IKD32AA9- 0 ,
FwRev=00FX0A4A, SerialNo=4G9323
Config={ HardSect NotMFM HdSw>15uSec Fixed DTR>10Mbs }
RawCHS=16383/16/63, TrkSize=36477, SectSize=579, ECCbytes=4
BuffType=3(DualPortCache), BuffSize=512kB, MaxMultSect=16, MultSect=?0?
DblWordIO=no, OldPIO=2, DMA=yes, OldDMA=2
CurCHS=16383/16/63, CurSects=16514064, LBA=yes, LBAsects=17660160
tDMA={min:120,rec:120},
DMA modes: sword0 sword1 sword2 mword0 mword1 mword2
IORDY=yes, tPIO={min:400,w/IORDY:120}, PIO modes: mode3 mode4
UDMA modes: mode0 mode1 *mode2 mode3 mode4
and "hdparm /dev/hda" reads:
/dev/hda:
multcount = 0 (off)
I/O support = 0 (default 16-bit)
unmaskirq = 0 (off)
using_dma = 0 (off)
keepsettings = 0 (off)
nowerr = 0 (off)
readonly = 0 (off)
readahead = 8 (on)
geometry = 1099/255/63, sectors = 17660160, start = 0
So, I try to set the DMA on with "hdparm -d1 /dev/hda", but I get the
following:
/dev/hda:
setting using_dma to 1 (on)
HDIO_SET_DMA failed: Operation not permitted
using_dma = 0 (off)
?????????
Where am I wrong? Any help would be really appreciated!
Thanks in advance
Duccio
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PhD. Duccio Medini |mobile: +39 347 3343114
|phone: +39 075 5852760
Physics Dept. |
Biophysics Sector |fax: +39 075 44666
Perugia University (ITALY) |Via A. Pascoli
INFM, Perugia Unit |06123 Perugia (I)
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e-mail: duccio.medini@pg.infn.it
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