Saf-Te Logic - NEC EXPRESS5800/120Rc-2 Service Manual

SAF-TE Logic

Note:
SCSI disk drive cage. SAF-TE Logic is not available in systems that
include the standard SCSI disk drive cage.
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.
1-6 System Overview
SAF-TE Logic is in systems that include the hot-swap