recovery packageThe package that takes over on the Recovery Cluster in the event of a failure on the cluster.
RedundancyThe inclusion of duplicate or alternate system elements to improve operational reliability by ensuring continued operation in the event that a primary…
redundant array of independent disks (RAID)NetApp appliances use RAID 4, which protects against disk failure by computing parity information based on the contents of all the disks in the array.
RefreshingThis term can refer to periodic retensioning of tape, or the rerecording of recorded information onto the same tape (or different tape) to refresh the…
regional disasterA disaster, such as an earthquake or hurricane, that affects a large region. Local, campus, and proximate metropolitan clusters are less likely to protect…
Relative humidity (RH)The amount of water in the air relative to the maximum amount of water that the air can hold at a given temperature.
RestorationThe process of returning, as nearly as possible, a building or any of its parts to its original form and condition.
RestoreTo transfer data from a backup medium (such as tapes) to an on-line system, often for the purpose of recovery from a problem, failure, or disaster.
resynchronizationThe process of making the data between two sites consistent and current once systems are restored following a failure. Also called data resynchronization.
RetensioningThe process where a tape is unspooled onto a take-up reel and then rewound at a controlled tension and speed.
ROC (Raid on Chip)Single chip that provides hardware RAID protection by combining features and functionality that previously required separate components; a single chip…
rolling disasterA second disaster that occurs before recovering from a previous disaster, e.g. while data is being synchronized between two data centers after a disaster…
ROMB (RAID on Motherboard)A solution that is extremely cost-effective and compact in its design because all of the components of the RAID device are included on the motherboard.
Room ambient conditionsThe temperature, humidity, and air quality of the surrounding conditions. Those conditions generally found in a library, resource, studio, or office…
root volumeThe volume that a NetApp appliance first looks at when booting to obtain configuration information.
RTPReal-time Transport Protocol. An Internet protocol for the transmission of real-time data, including voice and video.
RTSPReal Time Streaming Protocol. An open standard for delivery of real-time media over the Internet.
SAF-TE (SCSI Accessed Fault-Tolerant Enclosure)An open specification that provides a comprehensive standardized method to monitor and report status information on the condition of disk drives, power…
SAN (Storage Area Network)A high-speed subnetwork of shared storage devices. A storage device is a machine that contains nothing but a disc or discs for storing data.
SAS (Serial Attached SCSI)The next-generation SCSI interface, the serial implementation of the SCSI standard, providing greater flexibility, performance, reliability, and…
SATA (Serial ATA)The successor to parallel ATA for data storage; a point-to-point connection that delivers full throughput to each storage device by allowing a single…
ScissionThe process in which a chemical bond in a molecule is broken either by reaction with another molecule, such as water, or by the absorption of a high…
SCSI (Small Computer System Interface)Pronounced skuzzy. A common, industry standard, electronic interface (highway) between computers and peripherals, such as hard discs, CD-ROM drives and…
SCSI addressThe full address of a device, consisting of the SCSI adapter number and SCSI ID, for example, 8a.1
SCSI BusA host adapter and one or more SCSI peripherals connected by cables in a linear chain configuration.
SCSI DeviceA device such as a host adapter board, fixed disk drive, or CD-ROM drive that is an initiator or a target or both, and is attached to a SCSI bus cable.
SCSI IDA unique identification number used for each device on the SCSI chain.
SDStrategic Defense Command (Army term) (See also SDC).
SDLT / SuperDLT"Super Digital Linear Tape" technology, a variant with highercapacity can store from 110 GB to 300GB on a single cartridgeand can transfer data at speeds…
Seamless Streaming TechnologyAdaptec's technology that optimizes Ultra320 SCSI performance by ensuring fast, smooth handling of data and SCSI commands.
Secure Shell (SSH)A protocol that is a standard method for replacing Telnet and Remote Shell sessions to secure encrypted communication over the Internet.
Secure Sockets Layer (SSL)A protocol that provides secure data communication through data encryption. This protocol enables authentication, integrity, and data privacy over…
SecureAdminA security product that enables you to administer a NetApp appliance in a nontrusted environment by creating a secure exchange between a client and the…
SecureShareA suite of products that enable UNIX and Windows-based applications to concurrently access and update shared files, with the integrity and cache coherency…
security descriptor (SD)The NTFS security information associated with a file. The SD contains the owner SID; owning group SID, which is not used; the Discretionary ACL, which is…
security ID (SID)The unique identifier that is used to identify Windows NT security objects (users and groups).
security styleThe security scheme in effect for a given file or directory. This may be UNIX-style, NTFS-style, or mixed.
serial consoleA terminal attached to the serial port of a NetApp appliance. Used to monitor and manage the appliance's operations.
Serial TechnologyAn interface design that allows data to be sent one bit at a time, using thin cables, and is capable of faster speeds, greater reliability, and more…
ServerAny computer on a network that contains data or applications shared by users of the network on their client PCs.
Shadow CopyA shadow copy is a high fidelity point-in-time copy of the original data. In the Windows environment, shadow copies are created using the Volume Shadow…
shareShare means the basic unit of capital of a Connecticut credit union. Members may receive dividends based on the number of shares held.
share-level ACLIn Windows, a special type of ACL, distinct from ACLs on files, that can be used to restrict access to various users or groups.
Signal-to-Noise RatioA specifically produced response (signal) compared to the response level (noise) when no specific stimulus (activity) is present.
Siloan alternative name for an Automated Cartridge System. See ACS.
Simple Network Management Protocol (SNMP)A standard Internet protocol that facilitates communications between a system being managed and the management console or framework.
SmartFilterSoftware that restricts access to Web sites. It identifies the sites that contain content in various categories, maintains lists of those sites in control…
SMBServer Message Block. The Microsoft file-sharing protocol that preceded CIFS.
SMPTEAbbreviation for the Society of Motion Pictures and Television Engineers.
SMS (Storage Management Subsystem)takes over many storage management tasks that were previously performed manually, such as such as space management, backup processing, and data set…
SnapCopyA software feature that enables you to copy one volume to another through the vol copy command set. Developed by Network Appliance.
SnapManager for ExchangeA suite of products that provide rapid data recovery for Microsoft Exchange, back up files without interrupting e-mail service, and enable efficient…
SnapMirrorA product that performs automated file system replication of a volume onto the same or a separate disk or filer. Developed by Network Appliance.
SnapRestoreA product that restores an entire volume to the state recorded in a previously taken snapshot. Developed by Network Appliance.
snapshotAmazon Elastic Block Store creates snapshots or backups of your volumes and stores them in Amazon S3.
Snapshot reserveThe portion of a volume's disk space that is reserved for snapshots.
Snapshot TechnologyA technology that takes point-in-time images of a file system, allowing the system to be rolled back to a specific time in case of disaster.
SNIAStorage Networking Industry Association. An organization dedicated to the advancement and development of standards for network storage.
SNIA (Storage Networking Industry Association)"Storage Networking Industry Association" is an association ofproducers and consumers of storage networking products, whosegoal is to further storage…
SNMPSimple Network Management Protocol. A standard Internet protocol that facilitates communications between a system being managed and the management console…
SNMP agentA process that gathers status and diagnostic information and forwards it to network management stations.
SNMP communityName that is used as a password by the SNMP manager to communicate with the SNMP agent.
SNMP trapAn asynchronous, unsolicited message sent by an SNMP agent to an SNMP manager indicating that an event has occurred on the filer.
SNTPSimple Network Time Protocol. A variation of NTP used to synchronize computer clocks on the Internet.
soft linkA file system object that can be used to redirect a path transparently to another part of the file system. Also known as "symlink" or "symbolic link."
special device fileThe device file name that the HP-UX operating system gives to a single connection to a node, in the format /dev/devtype/filename.
split brain syndromeSplit brain syndrome occurs when all networks designated to carry internal cluster communications fail, and nodes cannot receive heartbeat signals from…
SPOF (Single Point of Failure)A component of a cluster or node that, if it fails, affects access to applications or services. See also multiple points of failure.