# [OmniOS-discuss] dd does not work as expected with count=0 option

Janne Savikko jsavikko at niksula.hut.fi
Tue Jul 29 12:21:05 UTC 2014

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    Hi,

    I've used dd to create sparse files, and I noticed that dd does not work
    as expected with count=0 option, but keeps writing indefinitely. This does
    not happen with dd of Ubuntu 12.04,14.04, Solaris 11 Express (snv_151a),
    OSX 10.10 beta or OpenBSD 5.5.

    OmniOS build that I've tested this problem: omnios-b281e50 i86pc
    This behavior happens also with old Solaris 10 (Generic_139555-08 sun4v).

    Manual pages state "count=n, Copies only n input blocks". So according to
    documentation I expect it to copy only 0 blocks.

    Is this desired behavior (and should documentation be fixed) or a bug?

    Cheers,
    Janne

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