AMCC 3WARE 9500S Betriebsanweisung PDF herunterladen (Seite 276)

Appendix A. Glossary

266 3ware Serial ATA RAID Controller User Guide

• Boot volume size. The size to be assigned to volume 0 when creating a

unit through 3BM on a PC machine. Note that the resulting volume does

not have to be used as a boot volume. However, if the operating system is

installed on the unit, it is installed in volume 0.

•

Carve size. The size over which a unit will be divided into volumes, if

auto-carving is enabled.

•

Chassis Control Unit (CCU). A device within a chassis (or enclosure)

used to identify a drive or display status of a RAID unit by flashing the

appropriate LEDs.

•

CLI. Command Line Interface. The 3ware CLI is a text program, rather

than a GUI (graphical user interface). It has the same functionality as

3DM, and can be used to view, maintain, and manage 3ware controllers,

disks, and units.

•

Configuration. The RAID level set for a unit.

•

Controller. The physical card from 3ware that you insert into a computer

system and connect to your disk drives or enclosure. The controller

contains firmware that provides RAID functionality. 3ware makes a

number of different models of SATA RAID controllers. (See “System

Requirements” on page 2.)

•

Controller ID number. Unique number assigned to every 3ware

controller in a system, starting with zero.

•

Create an array. The process of selecting individual disk drives and

selecting a RAID level. The array will appear to the operating system as a

single unit. Overwrites any existing unit configuration data on the drives.

Note that in 3ware software tools, arrays are referred to as units.

•

DCB. Disk configuration block. This is 3ware proprietary RAID table

information that is written to disk drives that are in a RAID unit, single

disk, or spare. The DCB includes information on the unit type, unit

members, RAID level, and other important RAID information.

•

Delete an array. Deleting an array (or unit) is the process of returning the

drives in a unit to individual drives. This erases the DCB information

from the drives and deletes any data that was on them. When a unit is

deleted from a controller, it is sometimes referred to as being “destroyed.”

If you want to remove a unit without deleting the data on it, do not delete

it; instead use the Remove feature in 3DM, and then physically remove

the drives.

•

Destroying. Same as deleting a unit.

•

Degraded unit. A redundant unit that contains a drive that has failed.

• Disk roaming. When moving a unit from one controller to another, refers

to putting disks back in a different order than they initially occupied,

without harm to the data.

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