HP MSA 1040 HP MSA 1040 CLI Reference Guide (762782-001, March 2014) - Page 508

compatible disk A disk that can be used to replace a failed member disk of a vdisk because it both has enough capacity and is of the same type (enterprise SAS or midline SAS) as the disk that failed. See also available disk, dedicated spare, dynamic spare, and global spare. complex programmable logic device See CPLD. Configuration See CAPI. Application Programming Interface controller A (or B) A short way of referring to controller module A (or B). controller enclosure An enclosure that contains one or two controller modules. controller module A FRU that contains the following subsystems and devices: an SC processor; an MC processor; a SAS expander and an EC processor; management interfaces; cache protected by a supercapacitor pack and nonvolatile memory (CompactFlash); host, expansion, network, and service ports; and midplane connectivity. In a controller enclosure, the upper controller module is designated A and the lower one is designated B. Coordinated Universal See UTC. Time CPLD Complex programmable logic device. An electronic component used to build reconfigurable digital circuits. It can replace large numbers of logic gates. CQL CIM Query Language. CRC Cyclic Redundancy Check. A mathematical algorithm that, when implemented in software or hardware, can be used to detect errors in data. CSV Comma separated values. A format to store tabular data in plain-text form. Cyclic Redundancy Check See CRC. Data Encryption Standard See DES. dedicated spare A disk that is reserved for use by a specific vdisk to replace a failed disk. See also available disk, compatible disk, dynamic spare, and global spare. default mapping Host-access settings that are configured when a volume is created, and that apply to all hosts that are not explicitly mapped to that volume using different settings. See also explicit mapping and masking. DES Data Encryption Standard. An algorithm for the encryption of electronic data. DHCP Dynamic Host Configuration Protocol. A network configuration protocol for hosts on IP networks. Distributed Management Task Force See DMTF. DMTF Distributed Management Task Force. An industry organization that develops and maintains standards for system management. drive enclosure An enclosure that contains one or two expansion modules. Drive enclosures can be connected to a controller enclosure to provide additional storage capacity. drive spin down See DSD. DRM Disaster recovery management. Storage-system firmware features that, when the Site Replication Adapter (SRA) feature is enabled, support the use of VMware's Site Recovery Manager to automate disaster-recovery failover and failback tasks. See also SRA. DSD Drive spin down. A power-saving feature that monitors disk activity in the storage system and spins down inactive disks based on user-selectable policies. dual-port disk A disk that is connected to both controllers so it has two data paths, achieving fault tolerance. 508 Glossary