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authornima <nima@abc39116-655e-4be6-ad55-d661dc543056>2009-03-31 11:37:58 +0000
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-.TH DMIDECODE 8 "October 2008" "dmidecode"
-.SH NAME
-dmidecode \- \s-1DMI\s0 table decoder
-.SH SYNOPSIS
-.B dmidecode
-.RB [ OPTIONS ]
-
-.SH DESCRIPTION
-.B dmidecode
-is a tool for dumping a computer's \s-1DMI\s0 (some say \s-1SMBIOS\s0) table
-contents in a human-readable format. This table contains a description of the
-system's hardware components, as well as other useful pieces of information
-such as serial numbers and \s-1BIOS\s0 revision. Thanks to this table, you can
-retrieve this information without having to probe for the actual hardware.
-While this is a good point in terms of report speed and safeness, this also
-makes the presented information possibly unreliable.
-
-The \s-1DMI\s0 table doesn't only describe what the system is currently made
-of, it also can report the possible evolutions (such as the fastest supported
-\s-1CPU\s0 or the maximal amount of memory supported).
-
-\s-1SMBIOS\s0 stands for System Management \s-1BIOS\s0, while \s-1DMI\s0
-stands for Desktop Management Interface. Both standards are tightly related
-and developed by the \s-1DMTF\s0 (Desktop Management Task Force).
-
-As you run it,
-.B dmidecode
-will try to locate the \s-1DMI\s0 table. If it succeeds, it will then parse
-this table and display a list of records like this one:
-
-Handle 0x0002, DMI type 2, 8 bytes.
-Base Board Information
- Manufacturer: Intel
- Product Name: C440GX+
- Version: 727281-001
- Serial Number: INCY92700942
-
-Each record has:
-.IP \(bu "\w'\(bu'u+1n"
-A handle. This is a unique identifier, which allows records to
-reference each other. For example, processor records usually reference
-cache memory records using their handles.
-.IP \(bu
-A type. The \s-1SMBIOS\s0 specification defines different types of elements
-a computer can be made of. In this example, the type is 2, which
-means that the record contains "Base Board Information".
-.IP \(bu
-A size. Each record has a 4-byte header (2 for the handle, 1 for the type,
-1 for the size), the rest is used by the record data. This value doesn't
-take text strings into account (these are placed at the end of the record),
-so the actual length of the record may be (and is often) greater than the
-displayed value.
-.IP \(bu
-Decoded values. The information presented of course depends on the type
-of record. Here, we learn about the board's manufacturer, model, version
-and serial number.
-
-.SH OPTIONS
-.TP
-.BR "-d" ", " "--dev-mem FILE"
-Read memory from device \fBFILE\fR (default: \fB/dev/mem\fR)
-.TP
-.BR "-q" ", " "--quiet"
-Be less verbose. Unknown, inactive and \s-1OEM\s0-specific entries are not
-displayed. Meta-data and handle references are hidden.
-.TP
-.BR "-s" ", " "--string KEYWORD"
-Only display the value of the \s-1DMI\s0 string identified by \fBKEYWORD\fR.
-\fBKEYWORD\fR must be a keyword from the following list: \fBbios-vendor\fR,
-\fBbios-version\fR, \fBbios-release-date\fR,
-\fBsystem-manufacturer\fR, \fBsystem-product-name\fR,
-\fBsystem-version\fR, \fBsystem-serial-number\fR,
-\fBsystem-uuid\fR,
-\fBbaseboard-manufacturer\fR, \fBbaseboard-product-name\fR,
-\fBbaseboard-version\fR, \fBbaseboard-serial-number\fR,
-\fBbaseboard-asset-tag\fR, \fBchassis-manufacturer\fR,
-\fBchassis-type\fR,
-\fBchassis-version\fR, \fBchassis-serial-number\fR,
-\fBchassis-asset-tag\fR, \fBprocessor-family\fR,
-\fBprocessor-manufacturer\fR,
-\fBprocessor-version\fR, \fBprocessor-frequency\fR.
-Each keyword corresponds to a given \s-1DMI\s0 type and a given offset
-within this entry type.
-Not all strings may be meaningful or even defined on all systems. Some
-keywords may return more than one result on some systems (e.g.
-\fBprocessor-version\fR on a multi-processor system).
-If \fBKEYWORD\fR is not provided or not valid, a list of all valid
-keywords is printed and
-.B dmidecode
-exits with an error.
-This option cannot be used more than once.
-.TP
-.BR "-t" ", " "--type TYPE"
-Only display the entries of type \fBTYPE\fR. \fBTYPE\fR can be either a
-\s-1DMI\s0 type number, or a comma-separated list of type numbers, or a
-keyword from the following list: \fBbios\fR, \fBsystem\fR,
-\fBbaseboard\fR, \fBchassis\fR, \fBprocessor\fR, \fBmemory\fR,
-\fBcache\fR, \fBconnector\fR, \fBslot\fR. Refer to the DMI TYPES section
-below for details.
-If this option is used more than once, the set of displayed entries will be
-the union of all the given types.
-If \fBTYPE\fR is not provided or not valid, a list of all valid keywords
-is printed and
-.B dmidecode
-exits with an error.
-.TP
-.BR "-u" ", " "--dump"
-Do not decode the entries, dump their contents as hexadecimal instead.
-Note that this is still a text output, no binary data will be thrown upon
-you. The strings attached to each entry are displayed as both
-hexadecimal and \s-1ASCII\s0. This option is mainly useful for debugging.
-.TP
-.BR " " " " "--dump-bin FILE"
-Do not decode the entries, instead dump the DMI data to a file in binary
-form. The generated file is suitable to pass to \fB--from-dump\fR
-later.
-.TP
-.BR " " " " "--from-dump FILE"
-Read the DMI data from a binary file previously generated using
-\fB--dump-bin\fR.
-.TP
-.BR "-h" ", " "--help"
-Display usage information and exit
-.TP
-.BR "-V" ", " "--version"
-Display the version and exit
-.P
-Options --string, --type, --dump and --dump-bin
-determine the output format and are mutually exclusive.
-
-.SH "DMI TYPES"
-The \s-1SMBIOS\s0 specification defines the following \s-1DMI\s0 types:
-
-.TS
-r l
-__
-r l.
-Type Information
-0 BIOS
-1 System
-2 Base Board
-3 Chassis
-4 Processor
-5 Memory Controller
-6 Memory Module
-7 Cache
-8 Port Connector
-9 System Slots
-10 On Board Devices
-11 OEM Strings
-12 System Configuration Options
-13 BIOS Language
-14 Group Associations
-15 System Event Log
-16 Physical Memory Array
-17 Memory Device
-18 32-bit Memory Error
-19 Memory Array Mapped Address
-20 Memory Device Mapped Address
-21 Built-in Pointing Device
-22 Portable Battery
-23 System Reset
-24 Hardware Security
-25 System Power Controls
-26 Voltage Probe
-27 Cooling Device
-28 Temperature Probe
-29 Electrical Current Probe
-30 Out-of-band Remote Access
-31 Boot Integrity Services
-32 System Boot
-33 64-bit Memory Error
-34 Management Device
-35 Management Device Component
-36 Management Device Threshold Data
-37 Memory Channel
-38 IPMI Device
-39 Power Supply
-.TE
-
-Additionally, type 126 is used for disabled entries and type 127 is an
-end-of-table marker. Types 128 to 255 are for \s-1OEM\s0-specific data.
-.B dmidecode
-will display these entries by default, but it can only decode them
-when the vendors have contributed documentation or code for them.
-
-Keywords can be used instead of type numbers with \fB--type\fR.
-Each keyword is equivalent to a list of type numbers:
-
-.TS
-l l
-__
-l l.
-Keyword Types
-bios 0, 13
-system 1, 12, 15, 23, 32
-baseboard 2, 10
-chassis 3
-processor 4
-memory 5, 6, 16, 17
-cache 7
-connector 8
-slot 9
-.TE
-
-Keywords are matched case-insensitively. The following command lines are equivalent:
-.IP \(bu "\w'\(bu'u+1n"
-dmidecode --type 0 --type 13
-.IP \(bu
-dmidecode --type 0,13
-.IP \(bu
-dmidecode --type bios
-.IP \(bu
-dmidecode --type BIOS
-
-.SH BINARY DUMP FILE FORMAT
-The binary dump files generated by --dump-bin and read using --from-dump
-are formatted as follows:
-.IP \(bu "\w'\(bu'u+1n"
-The SMBIOS or DMI entry point is located at offset 0x00.
-It is crafted to hard-code the table address at offset 0x20.
-.IP \(bu "\w'\(bu'u+1n"
-The DMI table is located at offset 0x20.
-
-.SH FILES
-.I /dev/mem
-.SH BUGS
-More often than not, information contained in the \s-1DMI\s0 tables is inaccurate,
-incomplete or simply wrong.
-.SH AUTHORS
-Alan Cox, Jean Delvare
-.SH "SEE ALSO"
-.BR biosdecode (8),
-.BR mem (4),
-.BR ownership (8),
-.BR vpddecode (8)