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expansion tray
A tray that does not have a RAID controller, used to expand the capacity of an array.
This type of tray must be attached to a controller tray to function.
extent
A set of contiguous blocks with consecutive logical addresses on a physical or virtual
disk.
failover and recovery
The process of changing the data path automatically to an alternate path.
fault coverage
The percentage of faults detected against all possible faults or against all faults of a
given type.
FC
See Fibre Channel (FC).
Fibre Channel (FC)
A set of standards for a serial I/O bus capable of transferring data between two ports
at up to 100 megabytes/second, with standards proposals to go to higher speeds.
Fibre Channel supports point to point, arbitrated loop, and switched topologies.
Fibre Channel was completely developed through industry cooperation, unlike SCSI,
which was developed by a vendor and submitted for standardization after the fact.
Fibre Channel switch
A networking device that can send packets directly to a port associated with a given
network address in a Fibre Channel storage area network (SAN). Fibre Channel
switches are used to expand the number of servers that can connect to a particular
storage port. Each switch is managed by its own management software.
field-replaceable unit (FRU)
An assembly component that is designed to be replaced on site, without the system
having to be returned to the manufacturer for repair.
FRU
See field-replaceable unit (FRU).
HBA
See host bus adapter (HBA).
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