In a message dated 9/6/2006 8:23:53 A.M. Central Daylight Time,  
[EMAIL PROTECTED] writes:

>Yes  Bill I agree, there is a huge amount of data and additional steps  are
>needed to get meaningful results from it.

>If you needed  to get Data Set level access information and had no OEM
>software  available, how would you proceed?


As I said in my previous post, I would have to build my own  tool.  This 
would be approximately a six-month development effort  to write an Assembler 
language program to read the GTF data, look for SSCH or  I/O interrupt records, 
scan those records for the CCW that sends the beginning  seek address to the 
controller, obtain that seek address, then pass that seek  address plus the 
device 
number to another routine that would find the UCB with  that device number, 
get its VOLSER, use that VOLSER to start accessing the VTOC  for that device 
number, and read all the F1 and F3 DSCBs until I found the one  containing the 
given seek address.  This assumes that I would be able to  find a 
machine-readable DSECT for the GTF data or, failing that, that I could  
successfully 
reverse-engineer the complex data found therein well enough to  locate the data 
elements I mentioned above.  I doubt that my management  would sign off on this 
project.
 
Either that or get a large notepad and begin a many-day process of doing  the 
same thing by hand for a very small amount of data.
 
Bill  Fairchild

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