SCSI Primary Commands - 2.pdf

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T10/1236-D Revision 20 18 July 20013.1.51 standby condition: When a logical unit is capable of accepting commands, but media is not immediatelyaccessible (e.g., spindle is stopped).3.1.52 status: One byte of response information sent from a device server to an application client uponcompletion of each command. A detailed definition of status may be found in SAM-2.3.1.53 system: One or more SCSI domains operating as a single configuration.3.1.54 target: A SCSI device that receives SCSI commands and directs such commands to one or more logicalunits. A detailed definition of a target may be found in SAM-2.3.1.55 task: An object within a logical unit that represents the work associated with a command or a group oflinked commands. A detailed definition of a task may be found in SAM-2.3.1.56 task set: A group of tasks within a logical unit, whose interaction is dependent on the task management(queuing), CA, and ACA rules. See SAM-2 and the Control mode page (see 8.3.6).3.1.57 third-party: An EXTENDED COPY command issued to one SCSI device to perform a copy operationbetween two other SCSI devices; or a RESERVE or RELEASE command issued by one initiator to manage areservation on behalf of another initiator (e.g., a processor device requests that a direct-access device reserveitself for use by a sequential-access device).3.1.58 unit attention condition: A state that a logical unit maintains while it has asynchronous status informationto report to one or more initiators. A detailed definition of the unit attention condition may be found in SAM-2.3.1.59 vendor specific (VS): Something (e.g., a bit, field, code value, etc.) that is not defined by this standard andmay be vendor defined.3.1.60 zero: The logical false condition of a variable.3.2 AcronymsACA Auto Contingent Allegiance (see 3.1.6)AER Asynchronous Event Reporting (see 3.1.5)ASC Additional Sense Code (see 7.20.2)ASCQ Additional Sense Code Qualifier (see 7.20.2)CA Contingent Allegiance (see 3.1.13 and SCSI-2)CDB Command Descriptor Block (see 3.1.11)CRC Cyclic Redundancy CheckD_ID Destination Identifier (defined in FC-FS, see clause 1)FC-FS Fibre Channel Framing and Signaling Interface (see clause 1)FCP-2 SCSI-3 Fibre Channel Protocol - 2 (see clause 1)LBA Logical Block AddressLSB Least significant bitLUN Logical Unit Number (see 3.1.33)MAM Medium Auxiliary Memory (see 3.1.35)MMC-2 SCSI Multi-Media Commands -2 (see clause 1)MSB Most significant bitNCITS National Committee for Information Technology StandardsOCRW SCSI Specification for Optical Card Reader/Writer (see clause 1)OSD Object-based Storage Devices Commands (see clause 1)RAID Redundant Array of Independent Disks8 dpANS SCSI Primary Commands - 2 (SPC-2)
18 July 2001 T10/1236-D Revision 20RBC SCSI Reduced Block Commands (see clause 1)RMC SCSI Reduced Multi-Media Commands (see clause 1)SAM SCSI-3 Architecture Model (see clause 1)SAM-2 SCSI Architecture Model -2 (see clause 1)SBC SCSI-3 Block Commands (see clause 1)SCC-2 SCSI Controller Commands -2 (see clause 1)SCSI The architecture defined by the family of standards described in clause 1SCSI-2 The architecture defined by the Small Computer System Interface - 2 standard (see 2.2)SES SCSI-3 Enclosure Services (see clause 1)SMC SCSI-3 Medium Changer Commands (see clause 1)SPC SCSI-3 Primary Commands (ANSI X3.301:1997, see clause 1)SPC-2 SCSI Primary Commands -2 (this standard, see clause 1)SPI-3 SCSI Parallel Interface -3 (see clause 1)SPI-4 SCSI Parallel Interface -4 (see clause 1)SSC SCSI-3 Stream Commands (see clause 1)VPD Vital Product Data (see 8.4)VS Vendor Specific (see 3.1.59)3.3 Keywords3.3.1 expected: A keyword used to describe the behavior of the hardware or software in the design modelsassumed by this standard. Other hardware and software design models may also be implemented.3.3.2 ignored: A keyword used to describe an unused bit, byte, word, field or code value. The contents or value ofan ignored bit, byte, word, field or code value shall not be examined by the receiving SCSI device and may be set toany value by the transmitting SCSI device.3.3.3 invalid: A keyword used to describe an illegal or unsupported bit, byte, word, field or code value. Receipt ofan invalid bit, byte, word, field or code value shall be reported as an error.3.3.4 mandatory: A keyword indicating an item that is required to be implemented as defined in this standard.3.3.5 may: A keyword that indicates flexibility of choice with no implied preference (equivalent to "may or maynot").3.3.6 may not: A keyword that indicates flexibility of choice with no implied preference (equivalent to "may or maynot").3.3.7 obsolete: A keyword indicating that an item was defined in prior SCSI standards but has been removed fromthis standard.3.3.8 optional: A keyword that describes features that are not required to be implemented by this standard.However, if any optional feature defined by this standards is implemented, then it shall be implemented as definedin this standard.3.3.9 reserved: A keyword referring to bits, bytes, words, fields and code values that are set aside for futurestandardization. A reserved bit, byte, word or field shall be set to zero, or in accordance with a future extension tothis standard. Recipients are not required to check reserved bits, bytes, words or fields for zero values. Receipt ofreserved code values in defined fields shall be reported as error.dpANS SCSI Primary Commands - 2 (SPC-2) 9
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