There are redundant power supplies and cooling units in the system, as well as backup batteries on the controller board. Dual fan trays, each with two fans. Fans speed up in response to higher temperatures. Three fans active out of four will cool the controller indefinitely. D1000 System Architecture Dual power supplies.
Dual fan trays, each with two fans.
Fans speed up in response to higher temperatures. Three fans active out of four will cool the interface board indefinitely. Two fans will support the tray for eight hours. ESM Environmental Service Module. Two independent differential UltraSCSI channels.