Date: Thu, 22 Jul 2004 15:45:09 +0100 (BST) From: Jan Grant <Jan.Grant@bristol.ac.uk> To: Ian FREISLICH <if@hetzner.co.za> Cc: current@freebsd.org Subject: Re: NEW TAR Message-ID: <Pine.GSO.4.61.0407221544060.27244@mail.ilrt.bris.ac.uk> In-Reply-To: <E1BndWu-000Bqw-00@hetzner.co.za> References: <E1BndWu-000Bqw-00@hetzner.co.za>
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On Thu, 22 Jul 2004, Ian FREISLICH wrote: > SanD wrote: >> Ian wrote: >>> How does dump handle sparse files? >> Dump handles fine sparse files. > > Maybe I should have asked how does dump figure out that the files > are sparse and if it's any more intelligent than a 2 pass read (I > have no idea why 2 passes are required) or just blindly turning > successive zeros into a seek offset, is there anything preventing > BSD tar from doing the same? Dump knows about the filesystem format; it talks that directly to the device. -- jan grant, ILRT, University of Bristol. http://www.ilrt.bris.ac.uk/ Tel +44(0)117 9287088 Fax +44 (0)117 9287112 http://ioctl.org/jan/ Political talk? / What is said can be unsaid / with good old BS -- ASCII haiku
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