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### DMI Information Key Points #### 1. DMI (Desktop Management Interface) - **定义与背景：**DMI（Desktop Management Interface）是一种由分布式管理任务组（DMTF）制定的标准，用于远程管理和监控桌面计算机系统。DMI的目标是提供一个统一且标准化的方法来收集、报告和控制桌面环境中的各种管理数据。 - **DMI作用：**DMI通过允许管理员远程执行任务如软件安装、配置更改、故障排除等，简化了大规模桌面系统的管理。此外，DMI还支持跨平台管理，使得不同操作系统和硬件平台之间的管理变得更为简便。 #### 2. DMTF (Distributed Management Task Force) - **组织简介：**DMTF是一个非营利性行业协会，致力于推动企业级和系统管理标准的发展及互操作性。成员包括来自全球各地的技术领导者。 - **宗旨与目标：**该组织旨在开发和推广一系列开放式的管理标准，以提高企业的管理效率并降低成本。 - **成员与贡献：**DMTF的成员不仅限于技术公司，还包括研究机构和教育机构。这些成员共同合作，为管理标准的制定和实施做出贡献。 #### 3. SMBIOS (System Management BIOS) - **定义与版本：**SMBIOS（System Management BIOS）是一种BIOS扩展，它在DMI框架内提供了关于系统硬件配置的详细信息。本文件提到的是SMBIOS 2.3.4版本。 - **功能与应用：**SMBIOS允许DMI工具查询和检索有关系统硬件的详细信息，例如制造商、型号、序列号等。这对于远程管理和监控硬件状态至关重要。 - **兼容性与更新：**由于DMTF会定期更新SMBIOS规范，因此各个版本之间可能存在兼容性差异。因此，在选择使用特定版本时，需确保其与当前硬件和管理工具的兼容性。 #### 4. 版权声明与专利权注意事项 - **版权归属：**文档中的所有内容版权属于DMTF，并保留所有权利。使用时需正确标注来源。 - **版本更新：**DMTF可能会随时更新规范文档，使用者应关注最新版本和发布日期。 - **专利权声明：**实现某些元素可能涉及第三方专利权问题。DMTF不对专利权的存在与否负责，也不对因依赖标准而导致的产品或协议侵犯第三方专利权承担责任。 #### 5. DMI 规范的应用场景 - **远程管理：**DMI使IT管理人员能够远程访问和管理桌面计算机，包括进行软件部署、故障诊断等工作。 - **资产管理：**DMI提供了一种有效的方式来跟踪和管理企业内的硬件资产，帮助组织更好地控制成本。 - **合规性检查：**通过DMI可以检查系统是否符合特定的安全策略或合规性要求。 - **系统监控：**DMI支持实时监控系统的健康状况，包括硬件故障检测、性能监控等功能。 #### 6. 关于第三方专利权的更多信息 - **通知网站：**对于已知的第三方专利权，DMTF会在其官方网站上提供相关信息。 - **责任豁免：**DMTF明确表示不承担因未识别或披露专利权而产生的任何法律责任。 - **风险提示：**使用DMI标准的企业需自行评估潜在的专利侵权风险。 #### 7. SMBIOS 参考规范 - **发布日期：**SMBIOS参考规范版本2.3.4发布于2002年12月6日。 - **主要内容：**该规范详细介绍了SMBIOS的数据结构、表格式、数据类型以及如何使用这些信息来获取系统管理所需的各种数据。 - **适用范围：**适用于所有需要进行系统管理的桌面和服务器环境。 DMI是一项重要的标准，它通过SMBIOS等组件提供了一套全面的解决方案，帮助企业和组织实现更高效的远程管理和资产管理。DMTF作为该领域的领导组织，不断更新和完善相关标准，以满足不断变化的技术需求。同时，需要注意的是，在实施这些标准时，还需要考虑到潜在的法律风险，尤其是专利权问题。

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Specification DSP0134

STATUS: Final

DMTF is a not-for-profit association of industry members dedicated to promoting enterprise and systems management and

interoperability. Members and non-members may reproduce DMTF specifications and documents for uses consistent with this

purpose, provided that correct attribution is given. As DMTF specifications may be revised from time to time, the particular version

and release date should always be noted.

Implementation of certain elements of this standard or proposed standard may be subject to third party patent rights, including

provisional patent rights (herein "patent rights"). DMTF makes no representations to users of the standard as to the existence of

such rights, and is not responsible to recognize, disclose, or identify any or all such third party patent right, owners or claimants, nor

for any incomplete or inaccurate identification or disclosure of such rights, owners or claimants. DMTF shall have no liability to any

party, in any manner or circumstance, under any legal theory whatsoever, for failure to recognize, disclose, or identify any such third

party patent rights, or for such party’s reliance on the standard or incorporation thereof in its product, protocols or testing

procedures. DMTF shall have no liability to any party implementing such standard, whether such implementation is foreseeable or

not, nor to any patent owner or claimant, and shall have no liability or responsibility for costs or losses incurred if a standard is

withdrawn or modified after publication, and shall be indemnified and held harmless by any party implementing the standard from

any and all claims of infringement by a patent owner for such implementations.

For information about patents held by third parties that have notified the DMTF that, in their opinion, such patent may relate to or

impact implementations of DMTF standards, visit http://www.dmtf.org/about/policies/disclosures.php.

S y s t e m M a n a g e m e n t B I O S ( S M B I O S ) R e f e r e n c e S p e c i f i c a t i o n

Version 2.3.4

December 6, 2002

Abstract

Continuing the DMTF's mission of leading the development of management standards for distributed

desktop, network, enterprise and Internet environments, the System Management BIOS Reference

Specification addresses how motherboard and system vendors present management information about

their products in a standard format by extending the BIOS interface on Intel architecture systems. The

information is intended to allow generic instrumentation to deliver this data to management applications

that use DMI, CIM or direct access and eliminates the need for error prone operations like probing system

hardware for presence detection.

This specification is intended to provide enough information for BIOS developers to implement the

necessary extensions to allow their product's hardware and other system-related information to be

accurately determined by users of the defined interfaces. This specification is also intended to provide

enough information for developers of management instrumentation to develop generic routines for

translating from SMBIOS format to the format used by their chosen management technology whether it is

a DMTF technology like DMI or CIM, or another technology like SNMP. To support this translation for

DMTF technologies, sections of this specification describe the DMI groups and CIM classes intended to

convey the information retrieved from an SMBIOS-compatible system through the interfaces described in

this document.

Note: The DMTF's DMI working group controls changes to this document; change requests should be

submitted to mailto://[email protected]. Refer to http://www.dmtf.org/standards/bios.php for the most

recent version of this document.

System Management BIOS Reference Specification Version 2.3.4

DMTF Specification DSP0134 2 of 93 20 January 2003

Document Revision History

Version

Release

Date

Description

2.0D

09/14/1995

Initial Release of DRAFT COPY

2.0M

12/12/1995

Final draft released, with the following changes:

• Specified that dmiStorageBase (Function 50h) and NVStorageBase (Function 55h) must be

paragraph-aligned.

• Added Command value to change a string to function 52h; Command enumeration values

modified.

• Removed redundant enumerations from Processor Family list

• Corrected Memory Subsystem Example

• Corrected/clarified Indexed I/O access-methods for event-log; Access Method enumeration values

and Access Method Address union modified

• Added clarifications to some of the event log types

2.00

03/06/1996

Final release, with the following changes:

• Specified that all structures end with a terminating NULL, even if the formatted portion of the

structure contains string-reference fields and all the string fields are set to 0.

• Corrected the Memory Subsystem Example, handles are now correctly created with a ‘dw’.

• Fixed formatting of some bit definition fields and function examples.

2.00.1

07/18/1996

Minor updates for new technology and clarifications.

• Added definitions for Pentium® Pro, Burst EDO, and SDRAM.

• Added clarifications to the Memory Controller Error Status.

2.1

06/16/1997

Added definition for static table interface, to allow the information to be accessed from new operating

systems, see 2.1 Table Convention on page 11. In addition:

• Changed references to DMI BIOS to SMBIOS throughout; these changes are unmarked.

• Added SubFunction DMI_CLEAR_EVENT_LOG2 to Function 54h - SMBIOS Control.

• For those structure entries that are string numbers, changed the Value field definition of the field

from Varies to STRING throughout; these changes are unmarked.

• BIOS Information structure: Added support for 4-digit year and additional BIOS Characteristics via

Characteristics Extension Byte 1.

• System Information structure: Added Wakeup Type and UUID fields.

• System Enclosure and Chassis structure: Added Bootup State, Power Supply State, Thermal State,

and Security Status to allow the DMTF|Physical Container Global Table to be populated.

• Processor Information structure: Voltage value can now be specified, rather than using bit-flags,

and added enumeration values for Pentium® Pro, Pentium® II, and Slot 1. Also added notes to

this section, indicating that the enumerated values for the structure are assigned by the DMTF.

This structure was also updated to include the Cache Information handles identifying the L1, L2,

and L3 caches associated with the processor.

• Memory Controller Information structure: Added Enabled Error Correcting field. Also added note

that this structure can never be updated to add string values, to preserve backwards compatibility.

• Cache Information structure: Added Speed, Error Correction Type, Type, and Associativity fields.

• Port Connector Information structure: Added enumerated values to Connector Types and Port

Types.

• System Slots structure: Added AGP enumeration values to Slot Type field.

• BIOS Language Information structure: Added abbreviated-format for language strings and

corrected example.

• System Event Log structure: OEM-specific Access Methods can now be defined, added standard

log header definitions, and a mechanism to allow the log entry’s variable data formats to be

described. Added note that this structure can never be updated to include string values, to

preserve backwards compatibility.

• Added Physical Memory Array, Memory Device, Memory Error Information, Memory Array Mapped

Address, and Memory Device Mapped Address structures to support the population of the DMTF

Enhanced Physical Memory groups.

• Added Built-in Pointing Device structure to support the population of the DMTF Pointing Device

group.

• Added Portable Battery structure to support the population of the DMTF Portable Battery group.

• Added appendices that contain a structure checklist and table-convention parsing pseudo-code.

System Management BIOS Reference Specification Version 2.3.4

DMTF Specification DSP0134 3 of 93 20 January 2003

Version

Release

Date

Description

2.2

03/16/1998

The following changes were made to v2.1 of the document to produce this version:

• Accepted all changes introduced at Version 2.1

• Added ACPI statement-of-direction for dynamic state and event notification

• Table-convention is required for v2.2 and later compliance

• Corrected Structure Table entry point length value.

• Added Command type 06h to the Plug-and-Play Set SMBIOS Structure function (52h).

• Added new processor enumerations from the updated DMTF MASTER.MIF

• System Enclosure: Added enumeration value for “Sealed-case PC”, to support Net PC-type

chassis’.

• Memory Controller Information: Corrected description of how the BIOS computes the structure

Length.

• System Event Log:

• Added definition for end-of-log data, Event Log Type 0FFh.

• Added generic system-management event type; the handle of an associated probe or cooling

device identifies the specific failing device.

• Memory Error Information: Corrected structure size and offsets.

• Portable Battery: Corrected the structure length and some of the offsets, added Smart Battery-

formatted fields

• Memory Device: Added RIMM form factor

• Added the following new structures

• System Reset structure to support the population of the DMTF Automatic System Reset

group.

• Hardware Security structure to support the population of the DMTF System Hardware Security

group.

• System Power Control structure to support the population of the DMTF System Power Control

group.

• Added Voltage Probe structure to support the population of the DMTF Voltage Probe group.

• Cooling Device structure to support the population of the DMTF Cooling Device group.

• Temperature Probe structure to support the population of the DMTF Temperature Probe

group.

• Electrical Current Probe structure to support the population of the DMTF Electrical Current

Probe group.

• Out-of-Band Remote Access structure to support the population of the DMTF Out-of-Band

Remote Access group.

• Inactive structure type to support standard structure superset definitions.

• End-of-Table structure type to facilitate easier traversing of the structure data.

2.3

08/12/1998

The following changes were made to v2.2 of the document to produce this version:

• Accepted all changes introduced at Version 2.2

• Clarified and corrected referenced documents

• A minimum set of structures (and their data) is now required for SMBIOS compliance.

• Documented an additional structure usage guideline, to optional structure growth.

• BIOS Information:

• 4-digit year format for BIOS Release Date required for SMBIOS 2.3 and later

• Added BIOS Characteristic Extension Byte 2 to include status that the BIOS supports the

BIOS Boot Specification.

• System Information: Added enumeration for Wake-up Type

• System Enclosure or Chassis: Added OEM-defined field.

• Processor Information:

• Added enumerated values for new processors from the updated MASTER.MIF and identified

that one structure is present for each processor instance.

• Modified interpretation of Lx Cache Handle fields for v2.3 and later implementations

• Memory Module Information: Corrected example, adding double-null to terminate the structure.

• System Slots: Added hot-plug characteristic definition and clarified usage of the PCI “Slot ID” field.

• Memory Device:

• Added enumerations for Form Factor and Device Type

• Added new field for memory Speed

• System Event Log: Added note describing how century portion of the 2-digit year within a log

record is to be interpreted.

• Voltage Probe, Temperature Probe, Electrical Current Probe, Cooling Device:

• Added Nominal Value field

• Added the following new structures

• Boot Integrity Services (BIS) Entry Point

• System Boot Information

• 64-bit Memory Error Information

• Management Device

• Management Device Component

• Management Device Threshold Data

System Management BIOS Reference Specification Version 2.3.4

DMTF Specification DSP0134 4 of 93 20 January 2003

Version

Release

Date

Description

2.3.1

3/16/1999

The following changes were made to v2.3 of the document to produce this version:

• Accepted all changes introduced at Version 2.3

• Adopted a three-tier document numbering procedure, see 1.1 for more information.

• BIOS Information:

• Added BIOS Characteristic Extension Byte 2, bit 1, to identify that the BIOS supports

F12=Network Boot functionality

• Processor Information

• Added Processor Family enumeration for new Pentium processors, defined reserved values

for future Pentium processors.

• Added fields: Asset Tag, Serial Number, and Part Number.

• System Slots

• Added slot type enumeration for PCI-X

• Added slot characteristic to identify support for (to-be) standard SMBus interface for PCI slots

• Memory Device:

• Added enumerated values for Memory Type and Form Factor, required for RamBus

implementations

• Added fields: Manufacturer, Asset Tag, Serial Number, and Part Number.

• Added the following new structures:

• Memory Channel (to support RamBus and SyncLink memory implementations)

• IPMI Device, to abstract the IPMI hardware dependencies to management software

• System Power Supply

2.3.1

12/14/2000

Released as DMTF Preliminary Specification DSP0119.

2.3.2

12 October

2001

The following changes were made to v2.3.1 of the document to produce this version:

• Accepted all changes introduced at v2.3.1

• Released as DMTF Specification DSP0130 (Preliminary)

• Updated the Abstract and Overview sections to be more DMTF-general than DMI-specific. Change

bars are present in the Overview section only.

• Deleted section 1.1 (future direction for ACPI interface specification). Any ACPI interface to provide

these structures should be provided by a future version of the ACPI specification itself.

• Removed "References" that had broken links.

• Modified sections 2 and 2.2 to indicate that the PnP calling interface is being deprecated at this

specification version.

• Noted in section 2.1 that the structure table data is boot-time static.

• For each enumerated list that indicated that the enumeration is controlled by the "DMTF, not this

specification", identified which CIM class.property and DMI group.attribute are mapped to the

enumerated value. Also added a note in the Overview section to indicate where change requests

should be sent.

• Baseboard Information (Type 2)

• Added fields: Asset Tag, Feature Flags, Location in Chassis, Chassis Handle, Baseboard

Type, and Contained Objects to support multi-system chassis like server blades.

• System Enclosure or Chassis (Type 3)

• Added fields: Height, Number of Power Cords, Contained Element Count, and Contained

Elements to support multi-system chassis like server blades.

• Processor Information (Type 4)

• Added new enumerations to Processor Family and Processor Upgrade

• Removed (SMBIOS-only) reserved ranges. These ranges are controlled by the DMTF, not the

SMBIOS group. The DMTF Device MOF (starting with v2.3) has commentary around the

Processor Family enumeration that suggests that enumerations below 256 be used only for

those processor types that are going to be reported via SMBIOS (since this specification’s

Processor Family field is a 1-byte entity).

• Cache (Type 7)

• Added new enumerations to Associativity

• Memory Device (Type 17)

• Added new enumerations to Memory Type

• Built-in Pointing Device (Type 21)

• Added new enumerations to Pointing Device Type

• Removed out-of-date section Correlation to DMTF Groups, in favor of updated section 3.3.

2.3.3

10 May

2002

The following changes were made to v2.3.2 of the document to produce this version:

• Accepted all changes introduced at v2.3.2

• Updated the Abstract to contain the updated DMTF copyright statement.

• Processor Information (Type 4)

• Added new enumerations to Processor Family and Processor Upgrade

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