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From: I.G.Batten@fulcrum.bt.co.uk (Ian G Batten)
Newsgroups: comp.unix.wizards
Subject: Re: Reserving Space on Disk
Keywords: File System
Message-ID: <+&Y$?H-@masalla.fulcrum.bt.co.uk>
Date: 19 Jul 90 11:51:30 GMT
References: <566@hhb.UUCP>
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Most articles on this subject seem to neglect the fact that many Unix
file-systems do not allocate blocks of all zeros.  Therefore lseeking
``a lot'' and writing one byte probably only allocates the block for the
byte you wrote.

ian