はまったので、他に困ってる人がいるかもしれないと思い書いておく。手短に。 HP ML110 G5でCentOS 5.2 x86_64をインストール。 # hdparm -tT /dev/hda /dev/hda: Timing cached reads: 16412 MB in 1.99 seconds = 8247.41 MB/sec Timing buffered disk reads: 10 MB in 3.24 seconds = 3.08 MB/secおそい! # hdparm -v /dev/hda /dev/hda: multcount = 16 (on) IO_support = 0 (default 16-bit) unmaskirq = 0 (off) using_dma = 0 (off) keepsettings = 0 (off) readonly = 0 (of