Date: Sat, 11 Jun 2016 21:52:40 +0000 From: bugzilla-noreply@freebsd.org To: freebsd-doc@FreeBSD.org Subject: [Bug 210222] 19.4.7.2. -- Add warning about ZFS silently masking datasets with the same mountpoints when recursively sending/receiving the root dataset Message-ID: <bug-210222-9@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=210222 Bug ID: 210222 Summary: 19.4.7.2. -- Add warning about ZFS silently masking datasets with the same mountpoints when recursively sending/receiving the root dataset Product: Documentation Version: Latest Hardware: Any OS: Any Status: New Severity: Affects Some People Priority: --- Component: Documentation Assignee: freebsd-doc@FreeBSD.org Reporter: b.manas.88@gmail.com I was following the handbook in trying to create a backup of the whole filesystem of a system that I had installed & configured. I ran into an issue when trying to send/receive the snapshot of the datasets. ** If a user takes a recursive snapshot of an entire pool, such as with test-system1# zfs snapshot -r zroot@TEST and then sends that to a second ZFS system, such as with test-system1# zfs send -vR zroot@TEST | ssh test-system2 zfs recv -Fdvu zroot/TEST/test-system1_zroot the resulting datasets on the receiving side will have mountpoints that are exactly the same as some of the datasets that already exist. ZFS does not warn about this and upon a reboot, important datasets will be masked. This requires booting into a livecd and manually changing the mountpoints so that they are no duplicates. This has happened to me before and I think there should be at least a warning in the handbook so that users who are not familiar with ZFS are aware of this danger. I spoke to Allan Jude about this at BSDCan 2016 and he responded positively to making this change. I am happy to submit a patch, I have attended 2 of the Doc Sprints at BSDCan 2016 and I will be familiarizing myself with the process of submitting a patch for documentation. -- You are receiving this mail because: You are the assignee for the bug.help
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