[Guest]

винт на 40 гиг
hdparm -Tt /dev/hdb2

Timing buffer-cache reads:   1740 MB in  2.00 seconds = 870.00 MB/sec
Timing buffered disk reads:   10 MB in  3.10 seconds =   3.23 MB/sec

как увеличить чтение  



hdparm -c 1 -d 1 -m 16 -X 66 /dev/hdb2

/dev/hdb2:
setting 32-bit IO_support flag to 1
HDIO_SET_32BIT failed: Invalid argument
setting multcount to 16
HDIO_SET_MULTCOUNT failed: Invalid argument
setting using_dma to 1 (on)
HDIO_SET_DMA failed: Invalid argument
setting xfermode to 66 (UltraDMA mode2)
multcount    = 16 (on)
IO_support   =  0 (default 16-bit)
using_dma    =  0 (off)

у меня DMA отключенно что ли