Date: Sun, 27 Jan 2013 03:36:08 -0500 From: grarpamp <grarpamp@gmail.com> To: freebsd-fs@freebsd.org Subject: ZFS slackspace, grepping it for data Message-ID: <CAD2Ti2-1ROTxQXNA6FzWtcgnMoaAzvfcdh__zH7AVC7zCPsyzw@mail.gmail.com>
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Say there's a 100GB zpool over a single vdev (one drive). It's got a few datasets carved out of it. How best to stroll through only the 10GB of slackspace (aka: df 'Avail') that is present? I tried making a zvol out of it but only got 10mb of zeros, which makes sense because zfs isn't managing anything written there in that empty zvol yet. I could troll the entire drive, but that's 10x the data and I don't really want the current 90gb of data in the results. There is zdb -R, but I don't know the offsets of the slack, unless they are somehow tied to the pathname hierarchy. Any ideas?
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