User's Guide

Glossary
Scalar i500 User’s Guide 550
format as the original data. Snapshots are also referred to as
point-in-time copies and as shadow copies.
SNMP (Simple Network Management Protocol) The protocol governing
network management and the monitoring of network devices
and their functions. Similar in function to SAM, except SNMP
governs LAN, whereas SAM governs SAN.
SSL (Secure Sockets Layer) A protocol that provides encrypted
communications on the Internet. SSL is layered beneath
application protocols such as HTTP, SMTP, Telnet, FTP, Gopher,
and NNTP and is layered above the connection protocol TCP/IP.
Storage device An appliance containing data that can be accessed, added
to, changed, or deleted by the user. The storage media types
include tapes and optical disks. A storage device can be a single
disk drive, or constitute thousands of tapes in a large tape library.
Storage slot The physical home where a data cartridge resides.
Subsystem status A feature that provides predictive alerts, warning of
any loss of connectivity or device failure using local or remote
alerts. Subsystem status allows administrators to correct faults
before they affect backup or other data transfer operations.
T
Tape drive
A device that spins disks and tapes while it reads and writes
data in storage.
TCP/IP (Transmission Control Protocol/Internet Protocol) The
communications protocol used by the Internet. It runs on top of
Ethernet to provide high-level networking services to
applications.
Topology The logical and/or physical arrangement of stations on a
network.
Trap An SNMP alert that is sent when predefined conditions are met.
For example, an error trap tests for an error condition and
provides a recovery routine.
U
UDS (Universal Drive Sled)
The hardware that houses Fibre Channel and
SCSI tape drives in a module.
User ID An alphanumeric value that the password database associates
with a login name. Also, UID.