Corey Brune mcbrune at
Wed Jul 27 01:27:47 GMT 2005

According to sys/param.h:

MAXPHYS - max raw I/O transfer size

MAXBSIZE -   Filesystems are made out of blocks of at most MAXBSIZE bytes
               per block.  MAXBSIZE may be made larger without effecting
               any existing filesystems as long as it does not exceed MAXPHYS,
               and may be made smaller at the risk of not being able to use
               filesystems which require a block size exceeding MAXBSIZE.

On 7/26/05, Wojciech Puchar <wojtek at> wrote:
> what is the difference between this 2 compile time defines?
> is it possible to set it up higher? (something like 0.5MB for modern disks
> make sense)
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