root@yama:/var/log# hdparm /dev/sda

/dev/sda:
 IO_support    =  0 (default 16-bit)
 readonly      =  0 (off)
 readahead     = 256 (on)
 geometry      = 48641/255/63, sectors = 781422768, start = 0
root@yama:/var/log# hdparm /dev/sdb

/dev/sdb:
 IO_support    =  0 (default 16-bit)
 readonly      =  0 (off)
 readahead     = 256 (on)
 geometry      = 48641/255/63, sectors = 781422768, start = 0
root@yama:/var/log# hdparm /dev/sdc

/dev/sdc:
 IO_support    =  0 (default 16-bit)
 readonly      =  0 (off)
 readahead     = 256 (on)
 geometry      = 48641/255/63, sectors = 781422768, start = 0
root@yama:/var/log# hdparm /dev/hda

/dev/hda:
 multcount     =  0 (off)
 IO_support    =  1 (32-bit)
 unmaskirq     =  1 (on)
 using_dma     =  1 (on)
 keepsettings  =  0 (off)
 readonly      =  0 (off)
 readahead     = 256 (on)
 geometry      = 60801/255/63, sectors = 976773168, start = 0