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DMIDECODE(8)                System Manager's Manual               DMIDECODE(8)



NAME
       dmidecode - DMI table decoder

SYNOPSIS
       dmidecode [OPTIONS]


DESCRIPTION
       dmidecode  is a tool for dumping a computer's DMI (some say SMBIOS) ta-
       ble contents in a human-readable format. This table contains a descrip-
       tion  of  the  system's  hardware  components,  as well as other useful
       pieces of information such as serial numbers and BIOS 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 DMI table doesn't only describe what the system is  currently  made
       of,  it  also  can  report the possible evolutions (such as the fastest
       supported CPU or the maximal amount of memory supported).

       SMBIOS stands for System Management BIOS, while DMI stands for  Desktop
       Management  Interface. Both standards are tightly related and developed
       by the DMTF (Desktop Management Task Force).

       As you run it, dmidecode will try to locate the DMI table. If  it  suc-
       ceeds, 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:

       o A handle. This is a unique identifier, which allows records to refer-
         ence  each  other.  For  example, processor records usually reference
         cache memory records using their handles.

       o A type. The SMBIOS 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".

       o 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.

       o 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.


OPTIONS
       -d, --dev-mem FILE
              Read memory from device FILE (default: /dev/mem)

       -h, --help
              Display usage information and exit

       -V, --version
              Display the version and exit


FILES
       /dev/mem

BUGS
       More often than not, information contained in the DMI tables is inaccu-
       rate, incomplete or simply wrong.

AUTHORS
       Alan Cox, Jean Delvare

SEE ALSO
       biosdecode(8), mem(4), ownership(8), vpddecode(8)



dmidecode                        February 2005                    DMIDECODE(8)