HP Surestore 64 - Director Switch User Manual page 136

R
R_A_TOV
See resource allocation time out value.
redundancy
Performance characteristic of a system or product whose integral components are
backed up by identical components to which operations will automatically failover in
the event of a component failure. Redundancy is a vital characteristic of virtually all
high-availability (24 hr./7 days per week) computer systems and networks.
resource allocation time out value
R_A_TOV is a value used to time out operations that depend on the maximum possible
time that a frame could be delayed in a fabric and still be delivered.
S
SAN
See storage area network.
SBAR
See serial crossbar assembly.
segmented E_Port
An E_Port that has ceased to function as an E_Port within a multiswitch fabric due to
an incompatibility between the fabrics that it joins. See also expansion port.
SEL
System error light.
serial crossbar assembly
The serial crossbar assembly (SBAR) is responsible for Fibre Channel frame
transmission from any director port to any other director port. Connections are
established without software intervention.
124 Glossary