Please refer the following command to get  info about disk   under Linux or Unix System [root@pwas2 ~]# hdparm hdparm – get/set hard disk parameters – version v5.7 Usage: hdparm [options] [device] .. Options: -a get/set fs readahead -A set drive read-lookahead flag (0/1) -b get/set bus state (0 == off, 1 == on, 2 == [...]