Dell PowerVault TL4000 Dell Model TL2000/TL4000 Tape Library- User's Guide - Page 275

serializer. A device that converts a space distribution of simultaneous states representing data into a corresponding time sequence of states. servo, servos. An adjective for use in qualifying some part or aspect of a servomechanism. servomechanism. A feedback control system in which at least one of the system signals represents mechanical motion. Simple Network Management Protocol. SNMP, a standard TCP/IP protocol to send alerts about conditions (such as need for operator intervention) over a TCP/IP LAN network to an SNMP monitoring station. Slot Blocker. A slot blocker is used to restrict/close off a data cell so a data cartridge cannot be placed there. This blocker can easily be removed. Small Computer Systems Interface (SCSI). A standard used by computer manufacturers for attaching peripheral devices (such as tape drives, hard disks, CD-ROM players, printers, and scanners) to computers (servers). Pronounced "scuzzy". Variations of the SCSI interface provide for faster data transmission rates than standard serial and parallel ports (up to 160 megabytes per second). The variations include: v Fast/Wide SCSI: Uses a 16-bit bus, and supports data rates of up to 20 MBps. v SCSI-1: Uses an 8-bit bus, and supports data rates of 4 MBps. v SCSI-2: Same as SCSI-1, but uses a 50-pin connector instead of a 25-pin connector, and supports multiple devices. v Ultra SCSI: Uses an 8- or 16-bit bus, and supports data rates of 20 or 40 MBps. v Ultra2 SCSI: Uses an 8- or 16-bit bus and supports data rates of 40 or 80 MBps. v Ultra3 SCSI: Uses a 16-bit bus and supports data rates of 80 or 160 MBps. v Ultra160 SCSI: Uses a 16-bit bus and supports data rates of 80 or 160 MBps. SNMP. Simple Network Management Protocol, a standard TCP/IP protocol to send alerts about conditions (such as need for operator intervention) over a TCP/IP LAN network to an SNMP monitoring station. SNS. Sense. special feature. A feature that can be ordered to enhance the capability, storage capacity, or performance of a product, but is not essential for its basic work. SR. Service representative, see also CE. SRAM. Static random access memory. SS. Status store. ST. Store. standard feature. The significant design elements of a product that are included as part of the fundamental product. START. Start maintenance. subsystem. A secondary or subordinate system, usually capable of operating independently of, or asynchronously with, a controlling system. SUPP. Support. sync. Synchronous, synchronize. Occurring with a regular or predictable time relationship. T tachometer, tach. A device that emits pulses that are used to measure/check speed or distance. tape cartridge. A container holding magnetic tape that can be processed without separating it from the container. tape void. An area in the tape in which no signal can be detected. TCP/IP. Transmission Control Protocol/Internet Protocol. TCU. Tape control unit. TH. Thermal. thread/load operation. A procedure that places tape along the tape path. TM. Tapemark. U UART. Universal asynchronous receiver/transmitter. unload. Prepare the tape cartridge for removal from the drive. utilities. Utility programs. utility programs. A computer program in general support of the processes of a computer; for instance, a diagnostic program. uv. Under voltage. V VOLSER. Volume serial number. Glossary I-7