Acer SmartRAID V Bedienungsanleitung Seite 247

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Seitenansicht 246
G-7
Glossary
SAF-TE
SCSI Accessed Fault-Tolerant Enclosure. A
specification (co-developed by nStor
Corporation, Inc. and Intel Corp.) which
provides a standardized method for monitoring
and reporting on the condition of disk drives,
power supplies and cooling systems used in
high availability LAN servers and storage
subsystems. The specification is independent of
hardware I/O cabling, operating systems, server
platforms, and RAID implementation because
the enclosure itself is treated as a device on the
SCSI bus.
Scatter/Gather
A feature that allows data to be transferred to or
from multiple noncontiguous areas of host
computer memory with a single I/O command.
SCSI
Small Computer Systems Interface. An ANSI
standard parallel interface for communication
with intelligent peripheral devices. The original
SCSI definition is defined in ANSI document
number X3.131-1986. The standard is now in its
third major revision.
SES
SCSI Enclosure Services. A SCSI-3 command
set that provides a method to manage and sense
the state of the power supplies, cooling devices,
displays, indicators, individual drives, and other
non-SCSI components installed in an enclosure.
See also SAF-TE.
SIMM
Single In-line Memory Module. A standard
packaging for RAM on a small circuit board with
a defined edge connector. See also DIMM.
Single-ended
An electrical signal protocol which transmits
information through changes in voltage. Single-
ended SCSI uses standard TTL signal-and-
ground pairs to transmit information over the
SCSI bus. Single-ended SCSI cables can be up
to 3 meters in length.
S.M.A.R.T.
Self-Monitoring, Analysis and Reporting
Technology. A standard for disk drives that
monitor their own condition and report
potential problems. It is part of the ATA-3
specification for IDE drives and is also used on
some SCSI drives.
SPX
Sequenced Packet Exchange. The transport
layer protocol used by Novell NetWare
networks.
Stripe
A contiguous region of disk space. Stripes can
be as small as one sector or can be composed of
many contiguous sectors.
Striping
A method of distributing data evenly across all
drives in an array by concatenating interleaved
stripes from each drive.
Synchronous
A data transmission protocol which is
synchronized to a defined time interval.
Synchronous SCSI can transmit data faster than
asynchronous SCSI because the transmitting
device does not wait for acknowledgment of
each byte from the receiving device.
Tagged Command Queuing
A feature of SCSI-2 and SCSI-3 protocols that
allows SCSI commands to be executed out of
order.
Target
A SCSI device, such as a disk drive, that
receives and executes commands from a SCSI
Initiator device such as a DPT SmartRAID V
controller.
TCP/IP
Transmission Control Protocol/Internet
Protocol. A widely used network communication
protocol that is the standard for transmitting
data through the Internet.
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