# hdparm -c3 -d1 -u1 -X70 /dev/hda
/dev/hda:
setting 32-bit IO_support flag to 3
setting unmaskirq to 1 (on)
setting using_dma to 1 (on)
HDIO_SET_DMA failed: Operation not permitted
setting xfermode to 70 (UltraDMA mode6)
IO_support = 3 (32-bit w/sync)
unmaskirq = 1 (on)
using_dma = 0 (off)
# hdparm -tT /dev/hda
/dev/hda:
Timing cached reads: 956 MB in 2.00 seconds = 477.83 MB/sec
Timing buffered disk reads: 6 MB in 3.57 seconds = 1.68 MB/sec
超级郁闷呀
