| architectures. |
| system driver that supports both Fibre Channel and SCSI devices. |
host | The computer system in which a storage adapter is installed. It uses the |
| storage adapter to transfer information to and from devices attached to |
| the SCSI bus. |
host adapter | A circuit board or integrated circuit that provides a device connection to |
board | the computer system. |
hot spare | An idle, powered on, standby drive ready for immediate use in case of |
| disk failure. It does not contain any user data. A hot spare can be |
| dedicated to a single redundant array or it can be part of the global |
| |
| When a disk fails, the controller firmware automatically replaces and |
| rebuilds the data from the failed drive to the hot spare. Data can be |
| rebuilt only from virtual disks with redundancy (RAID levels 1, 5, 10, and |
| 50; not RAID level 0), and the hot spare must have sufficient capacity. |
internal SAS | A SAS device installed inside the computer cabinet. These devices are |
device | connected by using a shielded cable. |
main memory | The part of a computer’s memory which is directly accessible by the CPU |
| (usually synonymous with RAM). |
NVRAM | Acronym for Nonvolatile Random Access Memory. An EEPROM |
| (Electronically Erasable |
| configuration information. Refer to EEPROM. |
PCI | Acronym for Peripheral Component Interconnect. A |
| local bus specification that allows the connection of devices directly to |
| computer memory. The PCI Local Bus allows transparent upgrades from |
| |
| data path at 66 MHz to |
PCI Express | Acronym for Peripheral Component Interconnect Express. A |
| |
| devices directly to computer memory. PCI Express is a |
| connection that transfers data on two pairs of |
| PCI Express goes beyond the PCI specification in that it is intended as |
| a unifying I/O architecture for various systems: desktops, workstations, |
| mobile, server, communications, and embedded devices. |
Glossary of Terms and Abbreviations | |
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