I've an HP ML110 with 2 sata disk in raid1, no ssd, 4gb ram. I'll try to change ML110 with another one, I only move disks and nics. Same problem:
From time to time (let's say a of time per week) the appliance stop responding completely, but does NOT power off (it remains powered on): the web GUI is unreachable and even the SSH access is no more available. I simply reboot it (in the hard way, with the power on button) and everything start working again.
More details: http://www.efwsupport.com/index.php/topic,3088.0.html
Thanks