Hi,
I've been fiddling with hdparm, trying to improve the I/O performance
of my machine (Gateway PII 233, 96Mb, 3.2Gb IDE disk). However, I can't
get hdparm to turn on the DMA mode:
# hdparm -d1 /dev/hda
/dev/hda:
setting using_dma to 1 (on)
HDIO_SET_DMA failed: Operation not permitted
using_dma = 0 (off)
When I use the -X34 option also as recommended in the hdparm man page,
I still get the same error.
I have a Quantum UDMA IDE hard drive, connected to a UDMA PCI controller
card. Here's the interesting bits from /proc/pci:
Bus 0, device 11, function 0:
RAID bus controller: Promise Technology Unknown device (rev 1).
Vendor id=105a. Device id=4d33.
Medium devsel. IRQ 9. Master Capable. Latency=32.
I/O at 0xfff0.
I/O at 0xffe4.
I/O at 0xffa8.
I/O at 0xfbe4.
I/O at 0xff80.
Bus 0, device 7, function 1:
IDE interface: Intel 82371SB Natoma/Triton II PIIX3 (rev 0).
Medium devsel. Fast back-to-back capable. Master Capable. Latency=32.
I/O at 0xff60.
And here's the info from the drive:
# hdparm -i /dev/hda
/dev/hda:
Model=QUANTUM FIREBALL ST3.2A, FwRev=A0F.0400, SerialNo=15371126
Config={ HardSect NotMFM HdSw>15uSec Fixed DTR>10Mbs }
RawCHS=6256/16/63, TrkSize=32256, SectSize=512, ECCbytes=4
BuffType=3(DualPortCache), BuffSize=81kB, MaxMultSect=16, MultSect=16
DblWordIO=no, maxPIO=2(fast), DMA=yes, maxDMA=2(fast)
CurCHS=6256/16/63, CurSects=6306048, LBA=yes, LBAsects=6306048
tDMA={min:120,rec:120}, DMA modes: sword0 sword1 sword2 mword0 mword1 mword2
IORDY=on/off, tPIO={min:120,w/IORDY:120}, PIO modes: mode3 mode4
Any ideas?
Thanks,
--
Tim Bell .--_|\
[EMAIL PROTECTED] / \
Department of Computer Science \_.--._/
University of Melbourne, Australia v
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