Clustering
Disk-to-Disk Backup
Downward
Compatible
FireWire
Hot
Swap Benefit
RAID
Overview
RAID
Comparison
Repeater
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SAN
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Termination
Basics
Interface
& Connector
Reference
SCSI
Connectors
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Storage Dictionary
- backplane
- A printed
circuit board, or device, containing slots or sockets for
plugging in boards or cables.
- BER
- Bit
Error Rate. A measure of transmission accuracy. It is a
ratio of bits received in error to bits sent.
- bit
- Binary
digit, with a value of 0 or 1. It is the smallest unit of
data a computer can process. Bits are arranged into groups
of eight, called bytes. A byte is the equivalent of one
character.
- block
- An
amount of data moved or addressed as a single unit; the
smallest amount of data that can be read or written at a
time. Blocks are separated by physical gaps, or identified
by their track/sector addresses or logical addresses.
- buffer
- Device
or allocated memory space used for temporary storage. Printers
commonly use buffers, for example, to hold incoming text
because the text arrives at a much faster rate than the
printer can output. In Fibre Channel, a buffer is usually
bigger than a single frame and may be the size of an entire
sequence.
- buffer-to-buffer
- A method
of transfer of information where the content is not known
to the elements transferring the information.
- bus
- 1.
A collection of unbroken signals that interconnect computer
modules.
2. A facility for transferring data between several devices
located between two end points, only one device being able
to transmit at a given time.
3. A signal path or line shared by many circuits or devices.
Information is often sent to all devices throughout the
same bus; only the device to which it is addressed will
accept it.
- bus
free phase
- The
phase when no SCSI device is actively using the SCSI bus,
and the bus is available for use.
- byte
- An
8-bit (octet) construct, a common unit of computer storage.
Generally, eight bits equal one character.
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