Glossary
The following glossary terms and definitions are provided as a reference for storage
products.
Glossary terms
ACL
Access control list.
ADS
Active Directory Service.
array
A synonym of storage array, storage system, and virtual array. A group of disks in one or more
disk enclosures combined with controller software that presents disk storage capacity as one or
more virtual disks.
backups
A read-only copy of data copied to media, such as hard drives or magnetic tape, for data
protection.
A full backup copies all the data selected to be backed up. An incremental backup copies only
data selected to be backed up that has changed since the last full backup.
Backups provide data protection in the event of system or hard drive failure, because the data
is stored on media separate from the system hard drives.
CIFS
Common Internet File System. The protocol used in Windows environments for shared folders.
CLI
Command-line interface. An interface comprised of various commands which are used to control
operating system responses.
cluster
A group of logically integrated servers that enables high availability, increases capacity, or
distributes processing.
CSR
Customer self repair.
data protection
A method of protecting data from being corrupted or lost as a result of hard drive failure. Methods
used to provide data protection include RAID and backups.
DHCP
Dynamic Host Configuration Protocol.
DNS
Domain Name System.
fault tolerance
The capacity to cope with internal hardware problems without interrupting the system’s data
availability, often by using backup systems brought online when a failure is detected. Many
systems provide fault tolerance by using RAID architecture to give protection against loss of data
when a single disk drive fails. Using RAID 1, 3, 5, 6, 10, or 50 techniques, the RAID controller
can reconstruct data from a failed disk drive and write it to a spare or replacement disk drive.
FTP
File Transfer Protocol.
HBA
Host bus adapter.
HDD
Hard disk drive.
ICT
Initial Configuration Tasks
iLO
Integrated Lights-Out.
iSCSI
Internet small computer system interface. Like an ordinary SCSI interface, iSCSI is standards-based
and efficiently transmits block-level data between a host computer (such as a server that hosts
Exchange or SQL Server) and a target device (such as the HP All-in-One Storage System). By
carrying SCSI commands over IP networks, iSCSI is used to facilitate data transfers over intranets
and to manage storage over long distances.
LAN
Local area network. A communications infrastructure designed to use dedicated wiring over a
limited distance (typically a diameter of less than five kilometers) to connect to a large number
of intercommunicating nodes. Ethernet and token ring are the two most popular LAN technologies.
(SNIA)
logical disk
A logical disk contains one or more volumes and spans multiple hard drives in an array. RAID
configuration of storage is performed at the logical disk level. Also known as a LUN.
98
Glossary
