CDB meaning in Computing ?

Answer:

What is Command Descriptor Block mean?

In SCSI standards for transferring data between computers and peripheral devices, often computer storage, commands are sent in a Command Descriptor Block (CDB).

Each CDB can be a total of 6, 10, 12, or 16 bytes, but later versions of the SCSI standard also allow for variable-length CDBs. The CDB consists of a one byte operation code followed by some command-specific parameters. The parameters need not be a full byte long, and the parameter length varies from one command to another. The available commands, with links to articles describing the detailed structure of many of them, are listed in the article section List of SCSI commands.

Typical CDB structures, for the 6- and 16-byte SCSI Request Sense Command, opcode 3, are:

6-byte CDB:

16-byte CDB:

An example with different allocation of bits to parameters is the 6-byte SCSI Mode Sense Command:

The generic form of the 12-byte CDB is:

See SPC-4 (http://www.t10.org/cgi-bin/ac.pl?t=f&f=spc4r34.pdf, free registration required) for more information.

reference

Full Form	Category
Climate Diagnostics Bulletin	Academic & Science
Cell Developmental Biology	Academic & Science
Center for Developmental Biology	Academic & Science
Cell and Developmental Biology	Academic & Science
Commune Development Budget	Accounts and Finance
Cold Bay (ak)	Airport Code
Caribbean Development Bank	Banking
China Development Bank	Banking
Canandaigua Brands, Inc.	Business
Cape Dutch Bakery	Business
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Child Development Bureau	Community
Capital Development Board	Community
Common Dialog Box	Computing
Content Data Base	Computing
Compiler Data Base	Computing
Condition Data Base	Computing
Catalog Data Base	Computing
Call Detail Block	Computing
Certificate Data Base	Computing
Container Data Base	Computing
Console Debugger	Computing
Constraint Data Base	Computing
Computer Data Base	Computing
Cloud Data Base	Computing
Command Descriptor Block	Computing
Constant Data Base	Computing
Custom Data Base	Computing
Common Data Base	Computing
Complete Data Base	Computing
Control Data Base	Computing
Compact Disc Box	Computing
Central Data Base	Computing
Card Data Base	Computing
Conversation Data Block	Computing
Card Database ( Cardscan)	File Type
Turbo C Utilities Main Database	File Type
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Command Description Bytes	General
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Casa Do B	General
Coupling Disorder Back	General
Clarks Desert Boot	General
Command Data Block	General
CDB definition by	General
Collective Defined Benefit	General
Citrate Dithionite Bicarbonate	General
Configuration Database	General
Chris Danny Brad	General
City of Dandenong Boys	General
Chromium Degrading Bacteria	General
Capital District Blacksmiths	General
Child Disability Benefit	Governmental
CHAUDHRIBANDH	Indian Railway Station
Cell DataDase	Medical
Clinical Data Base	Medical
Childhood Disability Benefits	Medical
Communications Database	Military and Defence
Corporate Database	Military and Defence
Construction Development Board	Military and Defence
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Central Data Buffer	Space Science
Command Data Base	Space Science