Glossary–3
Hitachi Unified Storage Hardware Service Guide
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Controller Box
The enclosure that contains the storage system controller. For some
models, disk drives may be included as well. Controller Boxes come in
2U and 3U versions.
• CBL: AC-powered 3U Controller Box.
• CBLD: DC-powered 3U Controller Box.
• CBSL Controller Box: A 3U Controller Box that can contain a
maximum of 12 3.5-inch drives.
• CBSS Controller Box: A 2U Controller Box that can contain a
maximum of 24 2.5-inch drives.
• CBXSL Controller Box: A 3U Controller Box that can contain a
maximum of 12 3.5-inch drives.
• CBXSS Controller Box: A 2U Controller Box that can contain a
maximum of 24 2.5-inch drives.
Cluster
A group of disk sectors. The operating system assigns a unique number
to each cluster and then keeps track of files according to which clusters
they use.
Cluster capacity
The total amount of disk space in a cluster, excluding the space
required for system overhead and the operating system. Cluster
capacity is the amount of space available for all archive data, including
original file data, metadata, and redundant data.
Command devices
Dedicated logical volumes that are used only by management software
such as CCI, to interface with the storage systems. Command devices
are not used by ordinary applications. Command devices can be shared
between several hosts.
Command line interface (CLI)
A method of interacting with an operating system or software using a
command line interpreter. With Hitachi Storage Navigator Modular
Command Line Interface, CLI is used to interact with and manage
Hitachi storage and replication systems.
Controller Box
The enclosure that contains the storage system controller. Some
Controller Boxes also include drives. Controller Boxes come in 2U and
3U versions.
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