Avago Technologies 3ware SAS 9750-16i4e - Manual (Page 307)

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• Cache. See Read Cache and Write Cache.
• 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). It has the same functionality as
3DM2, 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.
• 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 or single
disk. 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 3DM2, 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, RAID 6, 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.