The !bcb extension displays the specified buffer control block.

!bcb Address


Specifies the address of the buffer control block.


Windows 2000


Windows XP and later

Unavailable (see Remarks section)

Additional Information

For information about cache management, see the Microsoft Windows SDK documentation and Microsoft Windows Internals by Mark Russinovich and David Solomon. (These resources may not be available in some languages and countries.)

For information about other cache management extensions, use the !cchelp extension.


This extension is available for Windows 2000 only. In Windows XP or later, use the dt nt!_BCB Address command to display the buffer control block directly.

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