I'm running a network attached storage appliance (Iomega ix2-200) which is running some sort of Debian variant. Recently, the unit has been unable to shutdown cleanly, either via the web interface or by pressing the power button on the unit itself. It goes through the shutdown processes (killing SSH, samba, http daemons) but it hangs at a point I can't determine.
The unit flashes a small white LED when shutting down and this LED does not stop flashing. The drives do not power down, but there is no activity (at least that I can hear - it's usually quite noisy when reading/writing). Pressing the power button again at this stage does nothing, and the only way I can power the device back on is by pulling the power and reinserting it. Interestingly, when I pull the power and boot it back up the device doesn't complain with its "Oh I had an unsafe shutdown" email which it normally does if I yank the power supply.
Is this something I should be concerned with? The data on this NAS is quite valuable and I don't have a unit to backup to (this was the unit!). If it's a typical sign of these failing then I will go out and buy a new one.
Has anyone got any idea how to determine the shutdown process in the way of logs etc on a Debian operating system?
Update The last two messages the device gets in /var/log/messages are the following:
Aug 24 11:06:44 Ruth shutdown: shutting down for system halt
Aug 24 11:06:44 Ruth init: Switching to runlevel: 0