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/dev/hda:
Timing buffered disk reads: 64 MB in 2.97 seconds = 21.56 MB/sec
[root@dvalin root]# # See? A slight improvement
[root@dvalin root]# # Now let's turn off DMA and see how bad things
get. . .
[root@dvalin root]# hdparm -d 0 /dev/hda

/dev/hda:
setting using_dma to 0 (off)
using_dma = 0 (off)
[root@dvalin root]# hdparm -t /dev/hda

/dev/hda:
Timing buffered disk reads: 64 MB in 10.94 seconds = 5.85 MB/sec