On Thu, Sep 14, 2006 at 05:08:18PM -0500, Nicolas Williams wrote: > On Thu, Sep 14, 2006 at 10:32:59PM +0200, Henk Langeveld wrote: > > Bady, Brant RBCM:EX wrote: > > >Part of the archiving process is to generate checksums (I happen to use > > >MD5), and store them with other metadata about the digital object in > > >order to verify data integrity and demonstrate the authenticity of the > > >digital object over time. > > > > >Wouldn't it be helpful if there was a utility to access/read the > > >checksum data created by ZFS, and use it for those same purposes. > > > > Doesn't ZFS use block-level checksums? > > Yes, but the checksum is stored with the pointer. > > So then, for each file/directory there's a dnode, and that dnode has > several block pointers to data blocks or indirect blocks, and indirect > blocks have pointers to... and so on.
Does ZFS have block fragments? If so, then updating an unrelated file
would change the checksum.
Ceri
--
That must be wonderful! I don't understand it at all.
-- Moliere
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