Re: a question on mount count and maximum mount count

[Jelle de Jong <jelledejong powercraft nl>]

lakshmi pathi wrote:
> This is a case of where knowing what you are really trying to do would
> be useful
> 
> sorry :) I came across this interesting question in Linux forum , I
> thought about digging "/var/log/messages" and grep
> "Freeing initrd memory"  or some unique message might give the required answer.
> I posted the question here, because I wanted the professional answer :)
> 
> Thanks guyz, today I learned by last command.But how reliable   "last
> reboot" is ?  I quickly checked the man page it said /var/log/wtmp
> used by last command.- what will happen if  the log file
> modified/erased or archived.

You can also use de S.M.A.R.T. statistics of the hard drive, it will not
show you the reboots but it will show the spin ups of the hard drive so
power off power on, you can use this with the last reboot command and
get a good indication.

Best regards,

Jelle de Jong

# /usr/sbin/smartctl -A /dev/sda | grep -E "Start_Stop_Count|Power_On_Hours|Power_Cycle_Count"
  4 Start_Stop_Count        0x0032   100   100   000    Old_age   Always       -       9
  9 Power_On_Hours          0x0032   098   098   000    Old_age   Always       -       8843
 12 Power_Cycle_Count       0x0032   100   100   000    Old_age   Always       -       9

/usr/sbin/smartctl -A /dev/sdb | grep -E "Start_Stop_Count|Power_On_Hours|Power_Cycle_Count"
  4 Start_Stop_Count        0x0032   100   100   000    Old_age   Always       -       53
  9 Power_On_Hours          0x0032   098   098   000    Old_age   Always       -       8844
 12 Power_Cycle_Count       0x0032   100   100   000    Old_age   Always       -       53