Date: Thu, 26 May 2011 18:22:49 +0000 (UTC) From: Kirk McKusick <mckusick@FreeBSD.org> To: cvs-src-old@freebsd.org Subject: cvs commit: src/sbin/newfs newfs.h Message-ID: <201105261823.p4QIN73m083072@repoman.freebsd.org>
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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
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