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cckddiag(1)		    General Commands Manual		   cckddiag(1)

NAME
       cckddiag	- Hercules CCKD	DASD diagnostic	tool

SYNOPSIS
       cckddiag	[options...] filename

DESCRIPTION
       Hercules	 support  tool	used  to  assist in the	diagnosis of CCKD DASD
       problems.  Operates on Hercules CCKD DASD volumes  in  read-only	 mode,
       and  displays various information contained in CCKD DASD	files.	Effec-
       tive usage requires internal knowledge of Hercules CCKD DASD files.

OPTIONS
       The following options are used to specify which portions	 of  the  CCKD
       DASD  file are to be displayed.	Options	may not	be combined; for exam-
       ple, -cd1 is not	a valid	option.	 Surround each option by blank(s).

       Argument	numbers	may be specified either	in decimal or hexadecimal.  If
       the  number  begins with	the characters 0x the number is	presumed to be
       hexadecimal; else the number is presumed	to  be	decimal.   No  numeric
       overflow	checking is done, the user is assumed (!) to know what they're
       doing.

       Options are divided into	three categories:  global  options,  track-re-
       lated options, and the offset option.

Global options
   filename
       specifies the Hercules CCKD DASD	filename (sometimes referred to	as the
       DASD image file)

   -v
       display version and exit

   -d
       display DEVHDR

   -c
       display CDEVHDR

   -1
       display L1TAB  (note this option	is a numeric one)

   -g
       enable debug output

Track-related options
       To direct cckddiag to a specific	track, two options  are	 provided:  -a
       and  -r.	 The remaining track-related options describe the kind of out-
       put desired.  The TRKHDR	for the	track is displayed for	all  track-re-
       lated options.

   -a cc hh
       display	absolute  CCHH	data  -	 where	cc and hh are respectively the
       cylinder	number (relative zero),	and the	head number (relative zero).

   -r tt
       display relative	track data - where tt is the  track  number  (relative
       zero).

   -2
       display	L2TAB -	requires a corresponding -a or -r specification	to di-
       rect cckddiag to	a specific track.

   -t
       display track data - displays the COUNT,	KEY, and DATA record summaries
       for the data residing on	the indicated track.

   -x
       hex  display  track  key/data - displays	the KEY	and DATA records' con-
       tents in	hexadecimal display format  for	 the  indicated	 track.	  Some
       repetitive data may be omitted from the hex display output.

Offset option
       This  option  provides  the  ability to examine any portion of the CCKD
       file, as	an alternative to track	specification.

   -o oo ll
       hex display data	at offset oo of	length ll.

SEE ALSO
       cckd(4)

       http://www.hercules-390.org/ the	Hercules emulator homepage.

       http://www.hercules-390.org/cckddasd.html which describes
	      the Hercules CCKD	DASD facility.

HISTORY
       2003-02-07 originally written by	James M. Morrison

				  2003-02-03			   cckddiag(1)

NAME | SYNOPSIS | DESCRIPTION | OPTIONS | Global options | Track-related options | Offset option | SEE ALSO | HISTORY

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