redundant | The ability of an array to maintain operability when one or more hardware failures occur. |
| RAID 1 array is an example of a redundant array. In the event of a drive failure, redundant |
| arrays can be restored to normal operation by replacing the failed drive and rebuilding the |
| array. |
rescan | Process of updating the current screen to show all currently available resources. |
segment | Disk drive or portion of a disk drive used to create a logical device. A disk can include RAID |
| segments and available segments. A RAID segment is part of a logical device; it can be used |
| by only one logical device at a time. Available segments can be used to define a new logical |
| device. If the disk is not part of any logical device, the entire disk is an available segment. |
serial ATA (SATA) | A successor to ATA that uses a serial, instead of parallel, interface. |
simple volume | A volume made up of disk space from a single disk. It can consist of a single region on a disk |
| or concatenated, multiple regions of the same disk. |
| Array created from one or more partitions. See also volume, spanned volume, RAID signature, |
| and “RAID 1” on page 18. |
spanned volume | A simple volume that spans two or more drives. |
spare | See hotspare. |
stripe | Contiguous set of data distributed across all the disks in an array. A striped array distributes |
| data evenly across all members in |
stripe size | The amount of data in each section of a striped array. |
striped array | See RAID signature and “RAID 5” on page 18. |
task | An operation that occurs only on the RAID controller, asynchronous to all other operations; for |
| example, initializing a disk or verifying an array. Some tasks can take an extended period of |
| time, particularly if the RAID controller is also performing intensive data I/O while the task is |
| running. |
verify | See consistency check command. |
volume | See simple volume and spanned volume. |
Glossary 24