In order to do disk rotation in a server, I need to know the current running time (online) time of a disk on a Linux CentOS release 6.3 (Final) system.
The disks are connected with SATA (e.g. /dev/sdc), are simple rotating type (Western Digital RE type disks), and are not organized in any RAID or similar.
I have tried to find it using
smartctrl (as suggested in superuser.com/questions/279412), but was unable to find the information. Any suggestion for command ?