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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 prob- lems. Operates on Hercules CCKD DASD volumes in read-only mode, and dis- plays various information contained in CCKD DASD files. Effective 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 example, -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 hexadeci- mal; else the number is presumed to be decimal. No numeric overflow check- ing is done, the user is assumed (!) to know what they're doing. Options are divided into three categories: global options, track-related 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 output de- sired. The TRKHDR for the track is displayed for all track-related op- tions. -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 direct 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' contents 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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