Date: Wed, 2 Jul 2014 11:35:48 -0400 From: Dan Plassche <dplassche@gmail.com> To: Warren Block <wblock@wonkity.com> Cc: freebsd-stable@freebsd.org Subject: Re: Dump an Unmounted Journaled UFS Filesystem Message-ID: <CAOD8Yqpa1G28%2Bc4GFYhpRBRv5cfvCV-tiD7n9hoHannx9J_haw@mail.gmail.com> In-Reply-To: <alpine.BSF.2.11.1407020755250.89636@wonkity.com> References: <CAOD8YqoB%2BZpS9XBgFf2=WjWmsG5f9MsiwSis1cB3irKOOz=ZSw@mail.gmail.com> <CAOD8Yqq5O1ZJ1RwGDTLnLtcvR0MhbLZEfWnOihaJL0xz875pOA@mail.gmail.com> <alpine.BSF.2.11.1407020755250.89636@wonkity.com>
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Thanks Alex and Warren. Omitting the "-L" flag makes sense to avoid any possible conflicts. Also, I am not normally taking a snapshot because there's no need to worry about data changing with the filesystem unmounted. > https://forums.freebsd.org/viewtopic.php?&t=41503 The concern is that "jstarcher" in that thread mentions errors upon a restore after dumping a journaled filesystem by omitting the "-L" option. I think the usage was different insofar as the dump occurred on a mounted system where the data could have changed. I'm curious if I would run into issues in restoring from a dump taken on an unmounted journaled filesystem. Perhaps a more accurate question would be whether dump understands the journaling implementation within the filesystem? Or maybe all data is written to a disk before a journaled filesystem is unmounted and dump does not need to understand the setup? This is frankly a corner case for me, since all my other machines have soft updates and journaling turned off. I'm trying to understand journaling more to work with the new filesystem defaults in the future. Thanks again, Dan
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