NEC Express5800/R120a-1 Bedienungsanleitung PDF herunterladen (Seite 109)

109

Appendix A : Glossary

The terms used on the Universal RAID Utility are listed in the tables below.

tem Basic Terms on RAID Sys

Ter m Description

RAID System The RAID System has the ability of using hard disk drives in a computer as Disk Arrays.

The RAID System handles a single RAID Controller as a single system.

RAID Controller The RAID Controller can use hard disk drives as Disk Arrays.

Physical Device Physical Devices are used by a RAID System. For most RAID Systems, Physical Devices

mean hard disk drives. Physical Devices can be other than hard disk drives if the RAID

Controller can connect with devices other than hard disk drives.

Disk Array The virtual hard disk space is created by some Physical Devices. So, you cannot see

Disk Array on operating system. You can create Logical Drive on Disk Array.

Logical Drive The virtual hard disk drive is created on a Disk Array to be recognized by OS. A specific

RAID Level should be set for each Logical Drive.

Hot Spare Hard disk drives of the type are prepared previously to be replaced with a Physical

Device in which a failure occurs.

re of any Disk Array in a single RAID Controller. Global Hot Spare Available as a Hot Spa

Dedicated Hot Spare Available as a Hot Spare of a specific Disk Array in a single RAID Controller.

Battery The battery is intended to hold the information on the cache memory in a RAID

Controller if the power supplied to the RAID Controller is interrupted.

Cache Memory The cache is intended to improve the I/O performance of a RAID Controller.

Enclosure Means a module equipped with slots to which Physical Devices are inserted.

Fan Unit Means a cooling fan unit installed in an enclosure.

Power Supply Unit Means a power unit supplying power to an enclosure.

Power Sensor Means a sensor monitoring the power supply unit in an enclosure.

Temperature Sensor Means a sensor monitoring the temperature of an enclosure.

Enclosure Management Module Means a module managing an enclosure.

1 2 ... 104 105 106 107 108 109 110 111 112 113 114 ... 117 118

Keine Kommentare

NEC Express5800/R120a-1 Bedienungsanleitung Seite 109