## 10.6.4 BLOCKSIZE Keyword

The BLOCKSIZE keyword specifies the physical I/O transfer size for the file. It takes the following form:

    BLOCKSIZE = bks

bks
  Is a numeric expression.

If you specify a BLOCKSIZE number, it is rounded up to a multiple of 512 byte blocks.

If you do not specify BLOCKSIZE or you specify zero, the filesystem default is assumed.

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