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(-)newfs.8 (-7 / +6 lines)
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.\"     @(#)newfs.8	8.6 (Berkeley) 5/3/95
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.\"     @(#)newfs.8	8.6 (Berkeley) 5/3/95
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.\" $FreeBSD$
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.\" $FreeBSD$
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.\"
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.\"
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.Dd February 22, 2011
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.Dd May 26, 2011
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.Dt NEWFS 8
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.Dt NEWFS 8
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.Os
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.Os
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.Sh NAME
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.Sh NAME
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The block size of the file system, in bytes.
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The block size of the file system, in bytes.
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It must be a power of 2.
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It must be a power of 2.
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The
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The
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default size is 16384 bytes, and the smallest allowable size is 4096 bytes.
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default size is 32768 bytes, and the smallest allowable size is 4096 bytes.
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The optimal block:fragment ratio is 8:1.
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The optimal block:fragment ratio is 8:1.
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Other ratios are possible, but are not recommended,
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Other ratios are possible, but are not recommended,
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and may produce poor results.
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and may produce poor results.
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.Ar blocksize Ns /8
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.Ar blocksize Ns /8
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and
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and
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.Ar blocksize .
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.Ar blocksize .
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The default is 2048 bytes.
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The default is 4096 bytes.
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Having a lower size will result in poor performance with modern disks utilizing
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4096 byte sectors.
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.It Fl g Ar avgfilesize
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.It Fl g Ar avgfilesize
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The expected average file size for the file system.
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The expected average file size for the file system.
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.It Fl h Ar avgfpdir
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.It Fl h Ar avgfpdir
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.Pa ad3s1a .
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.Pa ad3s1a .
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The
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The
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.Nm
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.Nm
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utility will use a block size of 16384 bytes, a fragment size of 2048 bytes
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utility will use a block size of 32768 bytes, a fragment size of 4096 bytes
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and the largest possible number of blocks per cylinders group.
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and the largest possible number of blocks per cylinders group.
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These values tend to produce better performance for most applications
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than the historical defaults
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(8192 byte block size and 1024 byte fragment size).
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This large fragment size may lead to much wasted space
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This large fragment size may lead to much wasted space
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on file systems that contain many small files.
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on file systems that contain many small files.
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.Sh SEE ALSO
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.Sh SEE ALSO

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