Intel Modular Server disks shutdown

I have an Intel Modular server with firmware version: 2.7.100.20090226.16239
and today all the 11 Hard Disks in the chassis have shutdown.
from 7:25am Drive 1 was marked Dead, followed then Drive 2, then Drive 3, etc and by 7:26am the last Drive 11 was marked Dead.
The fix was to remove power to the server. Then when power was applied and the the server hard disks functioned normally and the server was operational again.
The cause is unknown, however the server room air conditioning was not working and the fans on the server were running at maximum.
I have since updated the Firmware to Version: 5.0.100.20090928.19055
and today all the 11 Hard Disks in the chassis have shutdown.
from 7:25am Drive 1 was marked Dead, followed then Drive 2, then Drive 3, etc and by 7:26am the last Drive 11 was marked Dead.
The fix was to remove power to the server. Then when power was applied and the the server hard disks functioned normally and the server was operational again.
The cause is unknown, however the server room air conditioning was not working and the fans on the server were running at maximum.
I have since updated the Firmware to Version: 5.0.100.20090928.19055