Saf-Te Logic; System Cooling - NEC Express5800/140Rc-4 User Manual

General Description 2-17

SAF-TE Logic

The SCSI backplane includes SAF-TE (SCSI Accessed Fault Tolerant Enclosure) logic that provides
an interface to the disk subsystem that supports status signals, hot swapping drives, and enclosure
monitoring.
The transport mechanism for the standardized alert detection and status reporting is the SCSI bus.
Disk drives, power supplies, cooling fans, and temperature are continually monitored and the
conditions then reported over the SCSI bus to the system. When used with RAID management
software the user can be alerted of impending or imminent disk conditions requiring attention.
This allows the user to react to conditions that could normally go unnoticed until data loss.

System Cooling

The chassis includes a hot-swappable fan module with six fans for cooling the processor(s), hard
drives, and PCI cards. The fan system is located in the middle of the chassis to pull cooling air
through the chassis.