こんな環境ですが、参考になりますでしょうか…
L1 : debian(sid)
Kernel : 2.4.20-pre4 + acpi-20020821-2.4.20-pre4.diff.gz
+ etc
# dmesg (抜粋)
Uniform Multi-Platform E-IDE driver Revision:
6.31
ide: Assuming 33MHz system bus speed for PIO modes;
override with
idebus=xx ALI15X3: IDE controller on PCI bus 00
dev 80
PCI: No IRQ known for interrupt pin A of device
00:10.0 - using IRQ
255 ALI15X3: chipset revision 195
ALI15X3: not 100% native mode: will probe irqs
later
ide0: BM-DMA at 0xefe0-0xefe7, BIOS settings:
hda:DMA, hdb:pio
ALI15X3: simplex device: DMA disabled
ide1: ALI15X3 Bus-Master DMA disabled (BIOS)
hda: TOSHIBA MK3017GAP, ATA DISK drive
ide: Assuming 33MHz system bus speed for PIO modes;
override with
idebus=xx ide0 at 0x1f0-0x1f7,0x3f6 on irq 14
blk: queue c02b7d44, I/O limit 4095Mb (mask 0xffffffff)
hda: 58605120 sectors (30006 MB), CHS=3648/255/63,
UDMA(33)
# hdparm -d /dev/hda
/dev/hda:
using_dma = 1 (on)
# hdparm -t /dev/hda
/dev/hda:
Timing buffered disk reads: 64 MB in 3.29 seconds
= 19.45 MB/sec
### もっと速くなるのかなぁ？
kernel config のうち下記項目で y のもの
# IDE chipset support/bugfixes
CONFIG_BLK_DEV_IDEPCI=y
CONFIG_IDEPCI_SHARE_IRQ=y
CONFIG_BLK_DEV_IDEDMA_PCI=y
CONFIG_IDEDMA_PCI_AUTO=y
CONFIG_IDEDMA_ONLYDISK=y
CONFIG_BLK_DEV_IDEDMA=y
CONFIG_BLK_DEV_ADMA=y
CONFIG_BLK_DEV_ALI15X3=y
CONFIG_IDEDMA_AUTO=y
CONFIG_BLK_DEV_IDE_MODES=y
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