sudo hdparm /dev/hda

/dev/hda:
multcount =16 (on)
I/O support = 0 (default 16-bit)
unmaskirq = 0 (off)
using_dma = 0(off)
keepsettings = 0 (off)
nowerr = 0 (off)
readonly = 0 (off)
readahead = 8 (on)
geometry = 789/255/63, sectors = 12685680, start = 0
busstate = 1 (on)