Adaptec 48300 User Manual

Page 101

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Glossary

101

phantom object

Object that represents a component that cannot be configured by the
HostRAID controller management software; for example, a missing
drive.

PHY

The electronics that controls bit transmission. There is a PHY at each
end of a physical link.

Physical link

The connectors and cables that connect devices.

Port

One or more PHYs with a single SAS address, connected to an equal
number of PHYs with a single SAS address.

Q

quick init

An array configured using the Quick Init option is available
immediately, with no on-going background controller activity. All data
written to an array that has been quick configured is protected.

R

RAID

Redundant Array of Independent Disks (alternative definition
Redundant Array of Inexpensive Disks).

RAID 0

A

single-level array

consisting of two or more equal-sized segments

residing on different disks. RAID 0 distributes data evenly across its
respective drives in equal-sized sections called

stripe

s. RAID 0 arrays

are not redundant.

RAID 1

Single-level array consisting of two equal segments residing on two
different drives. Provides redundancy by storing identical copies on
two drives.

See also

mirrored array/mirroring

.

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