Depending on the blocksize used, a 3390 cylinder will hold up to about
820K bytes.  Unix blocks are typically 512 bytes, so a 3390 cylinder would
at most require about 1640 Unix blocks.  Thus, simple arithmetic:

     <Unix-blocks> = 1640 x <number-of-cylinders>

Using this, you may over-estimate by a few percent, but you won't under-
estimate.

--Art


At 11:19 PM 3/2/2006, Michael Pratt wrote:
  
>Hi,
>
>Does anyone have a calculator or tool that will allow me to convert
>mainframe cylinders into open systems blockcounts?  I have searched the
>archives and whilst there are a lot of mentions of using SATA for ML2 etc,
>I just cant seem to find an answer to this question anywhere...
>



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