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CSA ISO/IEC 14776-454:19 (R2024)

Information technology — Small Computer System Interface (SCSI) — Part 454: SCSI Primary Commands — 4 (SPC-4) (Adopted ISO/IEC 14776-454:2018, first edition, 2018-04)
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CSA ISO/IEC 14776-454:19 (R2024)

Information technology — Small Computer System Interface (SCSI) — Part 454: SCSI Primary Commands — 4 (SPC-4) (Adopted ISO/IEC 14776-454:2018, first edition, 2018-04)

PUBLISH DATE 2019
PAGES 962
CSA ISO/IEC 14776-454:19 (R2024)
Information technology — Small Computer System Interface (SCSI) — Part 454: SCSI Primary Commands — 4 (SPC-4) (Adopted ISO/IEC 14776-454:2018, first edition, 2018-04)
Scope

ISO/IEC 14776 (all parts) provides for many different types of SCSI devices (e.g., disks, tapes, media changers). This standard defines a device model that is applicable to all SCSI devices. Other command standards expand on the general SCSI device model in ways appropriate to specific types of SCSI devices. ISO/IEC 14776 (all parts) specifies the interfaces, functions, and operations necessary to ensure interoperability between conforming SCSI implementations. This standard is a functional description. Conforming implementations employ any design technique that does not violate interoperability. This standard defines the SCSI commands that are mandatory and optional for all SCSI devices. Support for any feature defined in this standard is optional unless otherwise stated. This standard also defines the SCSI commands that may apply to any device model. The following commands, parameter data, and features defined in previous versions of the SPC standard are made obsolete by this standard

  1. the TARGET RESET supported (TRS) bit and the WAKEUP supported (WAKES) bit in the REPORT SUPPORTED TASK MANAGEMENT FUNCTIONS parameter data
  2. code value 10 b (i.e., Per initiator port) in the MODE PAGE POLICY field in the mode page policy descriptor in the Mode Page Policy VPD page
  3. the removable medium devices with an attached medium changer model, MCHNGR bit in the standard INQUIRY data, the MOVE MEDIUM ATTACHED command in disks and tapes, and the READ ELEMENT STATUS ATTACHED command in disks and tapes
  4. linked commands
  5. the PPC bit in the LOG SENSE command
  6. the NUL bit in EXTENDED COPY command target descriptors (i.e., CSCD descriptors in this standard)
  7. EXTENDED COPY support for the processing of setmarks by sequential-access devices
  8. READ BUFFER commands with the MODE field set to 00 h and 1Ah
  9. and WRITE BUFFER commands with the MODE field set to 00 h, 1Ah, and 1Bh
SDO CSA: Canadian Standards Association
Document Number
Publication Date Jan. 1, 2019
Language en - English
Page Count 962
Revision Level
Supercedes
Committee
Publish Date Document Id Type View
Jan. 1, 2019 CSA ISO/IEC 14776-454:19 (R2024) Revision
Jan. 1, 2019 CSA ISO/IEC 14776-454:19 (R2024) Revision