EUROLOGIC MAN-FC2000-RAID Guia do Utilizador descarregar pdf (Página 31)

Appendix A: Glossary of Terms

Term Description

Backplane A PCB into which the controller plugs

C0 / C1 See Master / Slave

C-C Nexus Controller-to-controller nexus. A configuration of two RAID con-

trollers sharing a common set of drives (see Dual-active mode)

DDA Direct Disk Attach

DRAM Dynamic Random Access Memory

Dual-active Mode A method of interconnecting multiple RAID controllers that share

a common set of drives. In addition to increasing overall perfor-

mance, this method allows a surviving controller to take over

resources of a failed controller. This failover process is transparent

to the host

Duplex See dual-active mode

Fail-over A process whereby a controller puts its partner controller in reset

and assumes its duties

Failed controller A controller that has been determined to be malfunctioning by its

partner

FC_AL Fibre Channel Arbitrated Loop. A direct attachment ANSI archi-

tecture interface that supports a maximum of 126 ports

FCP Fibre Channel Protocol

Hot-plug (Hot Swap) Hot plug refers to removing and inserting a controller

while system power is applied. This can occur while the other

controller in a dual-controller implementation is active

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EUROLOGIC MAN-FC2000-RAID Guia do Utilizador Página 31