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From: Kirk McKusick <mckusick@FreeBSD.org>
Date: Thu, 26 May 2011 18:22:49 +0000 (UTC)
To: cvs-src-old@freebsd.org
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Subject: cvs commit: src/sbin/newfs newfs.h
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mckusick    2011-05-26 18:22:49 UTC

  FreeBSD src repository

  Modified files:
    sbin/newfs           newfs.h 
  Log:
  SVN rev 222319 on 2011-05-26 18:22:49Z by mckusick
  
  Raise the default blocksize for UFS/FFS filesystems from
  16K to 32K and the default fragment size from 2K to 4K.
  
  The rational is that most disks are now running with 4K
  sectors.  While they can (slowly) simulate 512-byte sectors
  by doing a read-modify-write, it is desirable to avoid this
  functionality.  By raising the minimum filesystem allocation
  to 4K, the filesystem will never trigger the small sector
  emulation.
  
  Also, the growth of disk sizes has lead us to double the
  default block size about every ten years.  The rise from 8K
  to 16K blocks was done in 2001.  So, by the 10-year metric,
  the time has come for 32K blocks.
  
  Discussed at: May 2011 BSDCan Developer Summit
  Reference: http://wiki.freebsd.org/201105DevSummit/FileSystems
  
  Revision  Changes    Path
  1.27      +2 -2      src/sbin/newfs/newfs.h