Storage — page 8 of 9

Storage terms

701. SSH Secure Shell. A protocol that is a standard method for replacing Telnet and Remote Shell sessions to secure encrypted communication over the Internet.
702. SSL See definition for: Secure Sockets Layer (SSL)
703. Stick slip The process in which (1) the tape sticks to the recording head because of high friction; (2) the tape tension builds because the tape is not moving at the…
704. Sticky shed The gummy deposits left on tape path guides and heads after a sticky tape has been played.
705. Sticky tape Tape characterized by a soft, gummy, or tacky tape surface. Tape that has experienced a significant level of hydrolysis so that the magnetic coating is…
706. Storage Area Network (SAN) A Storage Area Network (SAN) is a network of storage disks. In large enterprises, a SAN connects multiple servers to a centralized pool of disk…
707. Storage Array A subsystem which houses a group of disks (or tapes), together controlled by software usually housed within the subsystem.
708. Storage Consolidation "Storage Consolidation" is a method of centralizing data storageamong multiple servers. Also know as storage convergence.
709. Storage Controller Providing such functionality as disk aggregation (RAID), I/O routing, and error detection and recovery, the controller provides the intelligence for the…
710. Storage director A switch designed to link elements of a SAN or NAS across multiple sites. Storage directors are meant to act as a kind of switch of switches and are…
711. Storage Networking Industry Association (SNIA) An organization dedicated to the advancement and development of standards for network storage.
712. storage virtualization Physical storage resources are aggregated into storage pools,from which the logical storage is created.
713. stream A body of running water.
714. stream splitting The process of delivering a unique stream to multiple clients simultaneously. Stream splitting reduces the number of requests sent across the network to…
715. streaming accelerator A NetCache appliance configured to cache and split content from one or more streaming servers and provide that content to clients that request it.
716. streaming media audio-visual content that is played as it is being downloaded. Thus, an Internet user could begin watching a video clip as the footage downloads rather…
717. streaming media cache A NetCache appliance configured to proxy client requests for streaming media. Also known as "streaming media proxy."
718. streaming media presentation A general term used to describe the delivery of live or on-demand streaming media. A streaming media presentation can consist of multiple unique streams.
719. streaming server A server configured to serve streaming media to clients.
720. Stress The response of the body to physical, mental, or emotional pressure. This may make a person feel frustrated, angry, or anxious, and may cause unhealthy…
721. Striping (RAID 0) Spreads data evenly over multiple drives to enhance performance. Because there is no redundancy scheme, it does not provide data protection.
722. Substrate 1. A compound that is altered by an enzyme. 2. Food source for growing cells or micro-organisms. 3. Material on which a sedentary organism lives and grows.
723. SVC Switched Virtual Circuit. An ATM network connection established through signaling. The user defines the endpoints when the call is initiated.
724. SVOL A secondary volume configured in an XP series disk array that uses Continuous Access.
725. switch A Java keyword used to evaluate a variable that can later be matched with a value specified by the case keyword in order to execute a group of statements.
726. switched virtual circuit (SVC) An ATM network connection established through signaling. The user defines the endpoints when the call is initiated.
727. symbolic link An alternate filename that points to the real "filename", which in turn points to the real "file".
728. SymCLI The Symmetrix command line interface used to configure and manage EMC Symmetrix disk arrays.
729. symlink A file system object that can be used to redirect a path transparently to another part of the file system. Also known as "symbolic link" or "soft link."
730. Symmetrix device number The unique device number that identifies an EMC logical volume.
731. Synchronization For data streams, the process whereby a received set of data is placed in one to one correspondence with the data assumed to have been transmitted.
732. synchronous data replication Each data replication I/O waits for the preceding I/O to complete before beginning another replication.
733. Synchronous Replication In synchronous replication, each write to the primary disk and the secondary (remote) disk must be complete before the next write can begin.
734. system board A printed circuit board that contains the CPU, expansion bus slots, and system memory. Also known as a "motherboard."
735. system-level file server (SFS) A series of SPEC benchmarks for NFS performance.
736. takeover In Data ONTAP, the emulation of the failed filer identity by the takeover filer in a cluster; the reverse of giveback.
737. takeover filer A filer that remains in operation after the other filer in a cluster stops working and that hosts an emulated filer that manages access to the failed…
738. takeover mode A management mode used from a takeover filer to interact with a failed filer. The console prompt indicates when the filer is in takeover mode.
739. takeover partner The NetCache appliance that is configured to take over certain specified functions of a partner appliance if that partner appliance fails.
740. Tape baking A process in which a magnetic tape is placed at an elevated temperature for a brief time in order to firm up the tape binder.
741. tape block A unit of data on tape.
742. tape device A logical representation in the file system of a piece of tape hardware, such as a tape device or stacker.
743. tape file Data on a tape delimited by file marks.
744. tape library Hardware that can access tape cartridges randomly.
745. tape media changer Hardware that can load and unload tape cartridges.
746. Tape noise A magnetic signal on the tape resulting from the finite size and nonuniform distribution of magnetic particles in the magnetic layer of the tape.
747. Tape pack The structure formed by and comprised solely of tape wound on a hub or spindle; a tape reel consists of a tape pack, the metal, plastic, or glass hub, and…
748. tape stacker Hardware that can access tape cartridges from a stack.
749. Target In diagnostic tests, the molecule or nucleic acid sequence assayed in a sample.
750. TB A disease caused by a specific type of bacteria that spreads from one person to another through the air.
751. TB (Terabyte) 1024 (or 1000) gigabytes.
752. TCDB (Tape Configuration Database) an ICF user catalog, which contains an inventory of the tape libraries and volumes in the libraries.
753. TCP/IP Offload Engine An ASIC that removes the burden of TCP/IP processing from the host CPU.
754. Tension Force, or force per tape width. The force on a tape as it is transported through a recorder.
755. Terabyte A unit of 1,000 or 1,024 gigabytes, or approximately a trillion bytes.
756. Terabyte (TB) (TB) A terabyte is a measure of computer data storage capacity and is one thousand billion (1,000,000,000,000) bytes.
757. Termination A Reporting Status for an employee who is leaving a covered position that requires the filer to file an SF 278.
758. Thermal A relatively small-scale, rising air current produced when the Earth's surface is heated.
759. thinning 1. Removal of older stems to promote new growth. 2. Removal of excess fruits to improve the size and quality of the remaining fruits. 3.
760. Throughput A term used to describe the amount of data which can be processed by a system in a given amount of time.
761. Tiered Storage Data is stored according to its intended use. For instance, data intended for restoration in the event of data loss or corruption is stored locally, for…
762. Time To Live (TTL) The time limit on how long a copy of an object remains in the cache before NetCache verifies the object with the originating Web server.
763. TMM (Tape Mount Management) a method of reducing tape mounts by allowing the system to manage the placement of data.
764. TP (1) Telenet Protocol (Telecomm/Computer term). (2) Test Program.
765. TPI (Tracks Per Inch) the number of tracks written within an inch on a disk's surface: a measure of track density.
766. TPM (Transaction Processing Monitor) Software that allows you to modify an application to store in-flight transactions in an external location until that transaction has been committed to all…
767. traceroute A utility that records the route of a computer connected to the Internet.
768. Track angle The angle that the track of a helical scan recording makes to the edge of the tape.
769. Transcription In biology, the process by which a cell makes an RNA copy of a sequence of DNA that is a gene.
770. Transmission Control Protocol/Internet Protocol The communications protocols that connect hosts on the Internet.
771. Transparency Transparency is a measure of how much information you have about the markets where you invest, the corporations whose stocks or bonds you buy, or the…
772. transparent failover A client application that automatically reconnects to a new server without the user taking any action.
773. transparent IP failover Moving the IP address from one network interface card (NIC), in the same node or another node, to another NIC that is attached to the same IP subnet so…
774. TRAP Tactical Receiver and Related Applications.
775. Trapezoidal error A change in the angle of a recorded helical scan track. Can result in mistracking.
776. tree quota A type of disk quota that restricts the disk usage of a qtree.
777. TSE Technical Support Engineer.
778. TTL Transistor-to-Transistor Logic.
779. twisted pair (TP) A type of wire generally used for telephone and network cabling.
780. U Abbreviation for uracil.
781. UCB (Unit Control Block) a control block in storage that describes the characteristics of a particular I/O device on the operating system.
782. UDP User Datagram Protocol, the typical way to send datagrams over the Internet.
783. UID A user ID. Often used in the context of "file" or "process" ownership.
784. Unicode A 16-bit character set designed to make it easier to exchange and display information that makes use of a wide range of different languages and symbols.
785. Unified Block and File Architecture The ability of Adaptec's iSCSI-enabled GuardianOS Snap Servers to store block and file data simultaneously on a single storage device.
786. uninterruptible power supply (UPS) Backup power supply that is available when the electrical power fails or drops to unacceptable levels.
787. unique stream A stream whose connection speed, media type, or thinning parameters are different from another stream that is part of the same streaming media…
788. UNIX cred The credential used to validate requests when accessing files with UNIX-style security.
789. UNIX permissions The bits used in UNIX-style security to control access to files and directories.
790. unmount To make the file system on a particular device inaccessible by detaching it from the file hierarchy.
791. unshielded twisted pair (UTP) A type of wire generally used for telephone and network cabling.
792. UPS Uninterruptible Power Source.
793. User Datagram Protocol (UDP) A connectionless network protocol that provides simple but unreliable transmission. An alternative to TCP that does not contain error checking.
794. user ID (UID) Any numerical identifier for users in a computer system.
795. user mapping A method of assigning identities between UNIX and NTFS, where one identity is mapped to another.
796. UTF Universal Character Set (UCS) Transformation Format. A format for representing multibyte characters that is compatible with programs and file systems that…
797. UTP See: uridine triphosphate.
798. VCI (Virtual Channel Identifier) A unique numerical tag defined by a 16-bit field in the ATM cell header that identifies a virtual channel over which the cell is to travel.
799. VDS (Virtual Disk Service) VDS is a set of application programming interfaces (APIs) that provides a single interface for managing disks in Windows Server 2003 operating systems.
800. VI (Virtual Interface) An architecture designed to allow bulk data transfer directly to or from application buffers.