kzkの日記： hdparm

debian% sudo hdparm -d0 -t /dev/hda

/dev/hda:
  setting using_dma to 0 (off)
  using_dma = 0 (off)
  Timing buffered disk reads: 8 MB in 3.33 seconds = 2.40 MB/sec

debian% sudo hdparm -d1 -c1 -t /dev/hda

/dev/hda:
  setting 32-bit IO_support flag to 1
  setting using_dma to 1 (on)
  IO_support = 1 (32-bit)
  using_dma = 1 (on)
  Timing buffered disk reads: 62 MB in 3.07 seconds = 20.20 MB/sec

ぐはって感じ。

#kernelのchipset supportをonにするの忘れてた。。。
#(カーネル入れ換え前はfailしてた)