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Re: bin/50108 (fsck_ffs fails replaying wapbl journal on filesystem with 4k sectors)
The following reply was made to PR bin/50108; it has been noted by GNATS.
From: mlelstv%serpens.de@localhost (Michael van Elst)
Subject: Re: bin/50108 (fsck_ffs fails replaying wapbl journal on filesystem with 4k sectors)
Date: Sun, 6 Sep 2015 08:19:40 +0000 (UTC)
dholland-bugs%netbsd.org@localhost (David Holland) writes:
> ...so, what else do we understand about how this PR is different from
45933 is caused by a bad superblock. The superblock encodes the
physical sector size as seen by newfs. Userland tools like fsck
use that information when reading a filesystem image. The kernel
ignores that information, the disk driver has its own data to
So when you make a filesystem image visible to multiple kernels
(like in: Xen host vs. Xen guest) it doesn't matter. But the
userland running under either kernel still cares.
Michael van Elst
"A potential Snark may lurk in every tree."
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