Hitachi G1000 - Page 195

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.
• CBLE: AC-powered 2U controller box with support for encryption.
• CBLD: DC-powered 3U controller box.
• CBLE: 3U controller box that supports encryption.
• 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.
CRC
See cyclic redundancy check.
cyclic redundancy check (CRC)
An error-correcting code designed to detect accidental changes to raw
computer data.
D
differential management-logical unit
disaster recovery
A set of procedures to recover critical application data and processing
after a disaster or other failure. Disaster recovery processes include
fallover and fallback procedures.
DMLU
See differential management-logical unit.
drive box
Chassis for mounting drives that connect to the controller box.
• Drive boxes with AC power supply:
○ DBS, DBL, DBF: Drive box (2U)
○ DBX: Drive box (4U)
○ DBW: Drive box (5U)
Glossary 195
Hitachi Virtual Storage Platform G1000, G1500, and Virtual Storage Platform F1500 Hardware Guide