About smartctl

[patrickchan701]

my centos server is crashed , the /dev/sda1 is unable to mount , it was repair by the centos source disc rescue mode function

I would like to try to run the command "smartctl -a /dev/sda" to check the health , just would like to know if I run this command , do I need to shutdown anything eg . service or unmount the volumn ? is there any risk to run this command ?

thanks

[jlehtone]

There is no risk in that. It simply reads the smart data.

The smartctl can be used to start a self-test on the drive. Not sure whether that is invasive.