z/OS MVS JCL Reference
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Subparameter definition

z/OS MVS JCL Reference
SA23-1385-00

value
Specifies in bytes an upper limit on a data sets's block size if BLKSIZE is omitted from all sources and the system determines the block size for the data set. The maximum value is 2,147,483,648 bytes (two gigabytes). The minimum value is 32K (32,768 bytes). The minimum value is 32K (32,760 bytes).
valueK
Specifies the block size limit in kilobytes (units of 1024). The maximum value is 2,097,152K (two gigabytes). The minimum value is 32K.
valueM
Specifies the block size limit in megabytes (units of 1024K). The maximum value is 2048M (two gigabytes). The minimum value is 1M.
valueG
Specifies the block size limit in gigabytes (units of 1024M). The maximum allowable value is 2G (two gigabytes). The minimum value is 1G.

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