problem with turning on the DMA (was: better than nice -d 19)
Hello.
Florian Ernst:
> hdparm -d doesn't toggle DMA, you have to set it explicitly, ie.
> hdparm -d1 /dev/hda
Sorry for jumping in mid-thread. I'm new to Debian and I wasn't aware
that the DMA isn't turned on by default. However, when I try to set it
up, I get
shot@chastell:~$ sudo hdparm -d1 /dev/hda
/dev/hda:
setting using_dma to 1 (on)
HDIO_SET_DMA failed: Operation not permitted
using_dma = 0 (off)
Does it mean I have to upgrade the kernel (I'd rather wait with this
until 2.6)? The system is a testing/unstable mix installed from the
Woody mini-ISO. Some more info:
shot@chastell:~$ lspci
00:00.0 Host bridge: VIA Technologies, Inc. VT8366/A/7 [Apollo KT266/A/333]
[...]
00:11.0 ISA bridge: VIA Technologies, Inc. VT8233A ISA Bridge
00:11.1 IDE interface: VIA Technologies, Inc. VT82C586A/B/VT82C686/A/B/VT8233/A/C/VT8235 PIPC Bus Master IDE (rev 06)
shot@chastell:~$ sudo hdparm -I /dev/hda
/dev/hda:
ATA device, with non-removable media
Model Number: ST3120026A
[...]
Capabilities:
[...]
DMA: mdma0 mdma1 mdma2 udma0 udma1 udma2 udma3 udma4 *udma5
Cycle time: min=120ns recommended=120ns
shot@chastell:~$ uname -rv
2.4.18-bf2.4 #1 Son Apr 14 09:53:28 CEST 2002
shot@chastell:~$ grep -i dma /boot/config-2.4.18-bf2.4
CONFIG_BLK_DEV_IDEDMA_PCI=y
CONFIG_BLK_DEV_ADMA=y
CONFIG_BLK_DEV_IDEDMA=y
CONFIG_SCSI_EATA_DMA=m
CONFIG_SCSI_SYM53C8XX_DMA_ADDRESSING_MODE=1
Is there anything else I should know about tuning the hard disks on
a somewhat novice level? If there's any more info I can provide I'd
gladly do so, I'm just not sure where to find it in Debian yet.
Cheers,
-- Shot
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