SheevaPlug cannot be shut down (except when you tear off the power plug). Maintenance web interface on next Meteohub update (4.4a) will reflect this be removing the "shutdown" button from the web interface.
After a hard power failure rootfs needs a cleaning which happens automatically. To have the unit rebooted again after file system cleanup, the flashing of boot loader parameters have been changed. Updated flash scripts are avaiable for download in "SheevaPlug download section".
Restart after power fail
Moderator: Mattk