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List:       freebsd-hackers
Subject:    UFS block writing
From:       Ivan Voras <ivoras () freebsd ! org>
Date:       2009-08-31 11:18:02
Message-ID: h7gbh3$rrk$1 () ger ! gmane ! org
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Does UFS do full-block writes? Always or only in specific circumstances?

For example, if a UFS file system is created with the 16/2 
block/fragment size, and a small random write (e.g. 512 bytes) comes in 
the middle of a larger file, will UFS read in the whole 16k block, 
modify it and write it out? What about fragments?

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