讀硬碟上面的時間訊息(或者硬體訊息) S.M.A.R.T. power on time

1:  smartctl
     snartctl --all /dev/sda

2: ipmitool chassis poh

3:ipmitool sdr entity 26
 Table 43-13, Entity ID Codes
26  1Ah   Disk Drive Bay

spec:   http://www.intel.com/design/servers/ipmi
ipmi-intelligent-platform-mgt-interface-spec-2nd-gen-v2-0-spec-update.pdf