3Ware 9550SX-4LP User Guide - Page 254

and good, performance., Controller ID number.

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Chapter A. Glossary • Carve size. The size over which a unit will be divided into volumes, if auto-carving is enabled. • CLI. Command Line Interface. The 3ware CLI is a text program, rather than a GUI (graphical user interface), for Windows, Linux, and FreeBSD. 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 ID number. The unique SCSI number in the Windows environment, or the Channel number in the Linux environment, of a particular controller. Typically assigned by the operating system. • 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. • Distributed parity. Parity (error correction code) data is distributed across several drives in RAID 5 and RAID 50 configurations. Distributing parity data across drives provides both protection of data and good performance. • Drive ID. A unique identifier for a specific drive in a system. Also called a port ID. • Drive Number. The SCSI number, or channel number, of a particular drive. • ECC. Error correction code. 244 3ware Serial ATA RAID Controller User Guide

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Chapter A. Glossary
244
3ware Serial ATA RAID Controller User Guide
•
Carve size.
The size over which a unit will be divided into volumes, if
auto-carving is enabled.
•
CLI
. Command Line Interface. The 3ware CLI is a text program, rather
than a GUI (graphical user interface), for Windows, Linux, and FreeBSD.
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 ID number.
The unique SCSI number in the Windows
environment, or the Channel number in the Linux environment, of a
particular controller. Typically assigned by the operating system.
•
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.
•
Distributed parity.
Parity (error correction code) data is distributed across
several drives in RAID 5 and RAID 50 configurations. Distributing parity
data across drives provides both protection of data
and good
performance.
•
Drive ID
. A unique identifier for a specific drive in a system. Also called a
port ID.
•
Drive Number
. The SCSI number, or channel number, of a particular
drive.
•
ECC.
Error correction code.