Mylex AcceleRAID 250 Informations techniques télécharger pdf (Page 227)

Glossary

Manual No. 775029 G-11

Fault tolerance (failure tolerance)

The ability of a system to continue to perform its function even when one of

its components has failed. For a system to be fault tolerant requires

redundancy in disk drives, power supplies, adapters, controllers and cabling.

Mylex RAID controllers offer high levels of fault tolerance.

Fibre Channel

A technology for transmitting data between computer devices at a data rate

of up to 1 Gbps (one billion bits per second), especially suited for connecting

computer servers to shared storage devices and for interconnecting storage

controllers and drives. Fibre Channel is expected to replace SCSI Parallel

Interface as the preferred transmission interface between servers and

clustered storage devices. It is also more flexible; devices can be as far as ten

kilometers (about six miles) apart. The longer distance requires optical fiber

as the physical medium. However, Fibre Channel also works using coaxial

cable and ordinary telephone twisted pair.

File Server

A computer shared by users over a Local Area Network (LAN). A file server

provides access to files by the users on a LAN. Other types of servers

perform application services (for example, mail servers, web servers) rather

than just store files.

Flash ROM

A memory on the adapter containing software that can be reprogrammed

without removing it from the board.

Format

A pre-established layout for data. Programs accept data as input in a certain

format, process it, and provide it as output in the same or another format. All

data is stored in some format with the expectation that it will be processed by

a program that knows how to handle that format.

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Mylex AcceleRAID 250 Informations techniques Page 227