.SAN design reference guide Vol. 1-5 785350-001

CNA Converged Network Adapter.
controller pair Two connected controller modules that control a disk array.
CWDM Coarse wavelength division multiplexing. The technique of placing more than one optical signal
on a single optical cable simultaneously.
See also WDM.
D
DA Directory agent. An iSCSI software component.
DAS Direct-attached storage.
DCB Data Center Bridging (Cisco).
DCBX Data Center Bridging Exchange Protocol.
DCC Device Connection Control. A data access policy that determines to which switch ports a Fibre
Channel device can connect.
DCE Data Center Ethernet.
DCFM Data Center Fabric Manager. A B-series switch feature used to centralize fabric management
through a host-based application.
DES Data Encryption Standard. A block cipher designed for use in symmetric cryptography, which
encrypts data in 64-bit blocks and uses a key length of 56 bits.
DHCHAP Diffie-Hellman Challenge-Handshake Authentication Protocol. An IP SAN security technology.
director fabric A SAN fabric that uses HP Director model switches.
discovery
authentication
A security method where the fabric presents only a partial list of authorized devices. Also known
as soft zoning.
DLS Dynamic load sharing.
DMP Dynamic Multipathing software.
DPM Data Path Module. A SAN-based device, separate from the core Fibre Channel switching
infrastructure, that provides storage virtualization services across heterogeneous hosts, storage,
and SAN fabrics.
DSM Device Specific Module.
DWDM Dense wavelength division multiplexing. The technique of placing several optical signals on a
single optical cable simultaneously.
See also WDM.
E
EBS Enterprise Backup Solution. HP SAN backup software.
ECB Electronic code book. An encryption cipher mode.
EE Encryption Engine. A feature of the B-series Encryption Switch.
EFMD Exchange Fabric Membership Data. A protocol used in C-series fabric binding configurations.
EFMS HP StorageWorks Enterprise Fabric Management Suite. Advanced switch management software
for H-series switches.
enterprise Any large organization where information technology is essential for continuing operations.
EoR End of Row (switch).
EOSL End Of Support Life.
ESCON Enterprise Systems Connection.
ESS Enterprise Storage System.
EUI Extended Unique Identifier.
EVA HP StorageWorks Enterprise Virtual Array. A high-performance, high-capacity, and high-availability
storage solution for the high-end enterprise class marketplace. Each EVA storage system consists
of a pair of HSV virtualizing storage controllers and the disk drives they manage.
410 Glossary