NonStop S-Series Planning and Configuration Guide (G06.29+)

Terms and Concepts
HP NonStop S-Series Planning and Configuration Guide—523303-021
1-21
Disk Drive Enclosures
Disk Drive Enclosures
A disk drive enclosure contains up to fourteen Fibre Channel arbitrated loop disk
drives. These disk drives connect to the server by way of FCSAs in IOAM enclosures.
Disk drive enclosures are installed in modular cabinets or other 19-inch racks.
Disk Drive Enclosure Components
These components are located in a disk drive enclosure:
•
Blowers (two) circulate cooling air through the disk drive enclosure
•
Fibre Channel disk drives or drive blanks (fourteen)
•
Environmental Monitoring Unit (EMU) monitors the enclosures and detects
conditions such as failed power supplies, blowers, elevated temperatures, and
external air sense faults.
•
Fibre Channel arbitrated loop I/O modules (FC-AL-A and FC-AL-B) route data to
and from the disk drives using Loop A and Loop B.
•
Power supplies (two), located behind the blowers, supply power to the disk drive
enclosure.
Disk Drive Enclosure, Front View
Disk Drive Enclosure, Rear View
Note. Disk drive enclosures and all related components are field-replaceable units (FRUs) and
must be installed by HP trained service providers. For more information about a disk drive
enclosure, the Modular I/O Installation and Configuration Guide is available to your HP trained
service provider. This manual is located in the NTL Hardware Service and Maintenance
collection.
VST805.vsd
VST804.vsd