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1.1 Glossary

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This document uses the following terms:

continuous data protection snapshot (CDP snapshot): A snapshot that tracks virtual disk changes and occasionally stores them in the underlying object store.

differencing virtual hard disk (VHD): A virtual hard disk that stores changes made to an associated virtual hard disk.

globally unique identifier (GUID): A term used interchangeably with universally unique identifier (UUID) in Microsoft protocol technical documents (TDs). Interchanging the usage of these terms does not imply or require a specific algorithm or mechanism to generate the value. Specifically, the use of this term does not imply or require that the algorithms described in [RFC4122] or [C706] have to be used for generating the GUID. See also universally unique identifier (UUID).

linked disk: A virtual disk that is related to another virtual disk as per an implementation-specific server policy.

persistent reservation: A SCSI feature supporting control operations for shared devices ([SPC-3] section 5.6).

SCSI command descriptor block (CDB): A block of information that describes a SCSI command.

SCSI request block (SRB): A block of information that describes a SCSI request.

sense data: Data describing command-completed information that a device server delivers to an application client in the same structure as the status or as parameter data in response to an SCSI command.

small computer system interface (SCSI): A set of standards for physically connecting and transferring data between computers and peripheral devices.

Unicode: A character encoding standard developed by the Unicode Consortium that represents almost all of the written languages of the world. The Unicode standard [UNICODE5.0.0/2007] provides three forms (UTF-8, UTF-16, and UTF-32) and seven schemes (UTF-8, UTF-16, UTF-16 BE, UTF-16 LE, UTF-32, UTF-32 LE, and UTF-32 BE).

virtual hard disk set (VHD set): A type of virtual disk that stores snapshot details.

MAY, SHOULD, MUST, SHOULD NOT, MUST NOT: These terms (in all caps) are used as defined in [RFC2119]. All statements of optional behavior use either MAY, SHOULD, or SHOULD NOT.