Hi
Kernel is 2.2.14, Smp, PIIX4 IDE, 2 X Pii 450.
After a bit more investigation, it appears that it is not using
UDMA. If I use hdparm to set any UDMA mode, I get the following in
dmesg:
hdc: timeout waiting for DMA
hdc: irq timeout: status=0x58 { DriveReady SeekComplete DataRequest }
hdc: DMA disabled
ide1: reset: success
The best I can get is multiword DMA mode2 at 3.05 Mb/s. I am using
hdparm -tT to measure the speed. Output from hdparm -iv is below.
/dev/hdc:
multcount = 0 (off)
I/O support = 0 (default 16-bit)
unmaskirq = 0 (off)
using_dma = 1 (on)
keepsettings = 0 (off)
nowerr = 0 (off)
readonly = 0 (off)
readahead = 8 (on)
geometry = 4160/255/63, sectors = 66835440, start = 0
Model=IBM-DPTA-373420, FwRev=P71OA30A, SerialNo=JXYJX017427
Config={ HardSect NotMFM HdSw>15uSec Fixed DTR>10Mbs }
RawCHS=16383/16/63, TrkSize=0, SectSize=0, ECCbytes=34
BuffType=3(DualPortCache), BuffSize=1961kB, MaxMultSect=16,
MultSect=off
DblWordIO=no, OldPIO=2, DMA=yes, OldDMA=2
CurCHS=16383/16/63, CurSects=16514064, LBA=yes, LBAsects=66835440
tDMA={min:120,rec:120}, DMA modes: mword0 mword1 *mword2
IORDY=on/off, tPIO={min:240,w/IORDY:120}, PIO modes: mode3 mode4
UDMA modes: mode0 mode1 mode2 mode3 mode4
Regards
-- Rob Murray- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.rutgers.edu Please read the FAQ at http://www.tux.org/lkml/
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