SE. Single-ended.

Secure Sockets Layer. See SSL.

segment. A part.

sel. Select.

Serial Attached SCSI (SAS). A drive sled with a SAS

interface can be linked directly to controllers. SAS is a
performance improvement over traditional SCSI
because SAS enables multiple devices (up to 128) of
different sizes and types to be connected
simultaneously with thinner and longer cables; its
full-duplex signal transmission supports 3.0 Gb/s. In
addition, SAS drives can be hot-plugged.

serialize. To change from parallel-by-byte to

serial-by-bit.

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.
SRAM. Static random access memory.

SS. Status store.

SSL. SSL, or Secure Socket Layer is a cryptographic

protocol that provide secure communications on the
Internet for such things as web browsing, EKM
communication, Internet faxing, instant messaging and
other data transfers. This protocol allows applications
to communicate across a network in a way designed to
prevent eavesdropping, tampering, and message
forgery.

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.

H-8 Dell PowerVault TL2000 Tape Library and TL4000 Tap e Library User's Guide