User's Manual

Glossary 79
Glossary
Access Policy
A virtual disk property indicating what kind of access is allowed for this virtual
disk. The possible values are
Read/Write , Read Only , or Blocked .
adapter
A device that enables a computer system to access peripheral devices by
converting the protocol of one bus or interface to another. An adapter can also
provide specialized function. For example, a RAID controller is a type of adapter
that provides RAID functions. Adapters can reside on the system board or be an
add-in card. Other examples of adapters include network and SCSI adapters.
Alarm Enabled
A controller property that indicates whether the controller’s onboard alarm is
enabled.
Alarm Present
A controller property that indicates whether the controller has an onboard
alarm. If present and enabled, the alarm is sounded for certain error conditions.
array
See disk group .
backplane
A hardware component that connects a primary controller board to peripheral
devices, such as disk drives, and that typically provides the signal and power
connections to the peripherals.
BBU Present
A controller property that indicates whether the controller has an onboard
battery backup unit to provide power in case of a power failure.