Dell PowerEdge RAID Controller H700 - Manual (Page 169)

Glossary 169
Reconstruct
The act of remaking a virtual disk after changing RAID levels or adding a
physical disk to an existing virtual disk.
Redundancy
The provision of multiple interchangeable components to perform a single
function to cope with failures and errors. Common forms of hardware
redundancy are disk mirroring, implementations of parity disks, or distributed
parity.
Redundant Path
The PERC H800 firmware provides support for detecting and establishing
redundant paths from the RAID controller to the SAS devices in the
enclosure. With redundant paths, if one path fails, another path can be used
to maintain communication between the controller and the enclosure.
Redundant Virtual Disk
A redundant virtual disk is one which has redundant data on physical disks in
the disk group that can be used to rebuild a failed physical disk. A virtual disk
can use disk striping across the physical disks, disk mirroring or parity to provide
redundancy. This offers protection in case of a physical disk failure.
Replace Member
The procedure used to copy data from a source physical disk of a virtual disk to a
target physical disk that is not a part of the virtual disk. The Replace Member
operation is often used to create or restore a specific physical configuration for
an array (for example, a specific arrangement of array members on the device
I/O buses).
Replacement Disk
A physical disk replacing a failed member disk in a virtual disk.
PERC7.2_UG.book Page 169 Thursday, March 3, 2011 2:14 PM