On Sat, Apr 05, 2014 at 04:00:27PM -0600, cwillu wrote: > On Fri, Apr 4, 2014 at 12:46 PM, Marc MERLIN <marc@xxxxxxxxxxx> wrote: > > On Wed, Apr 02, 2014 at 04:29:35PM +0800, Qu Wenruo wrote: > >> Convert man page for btrfs-zero-log > >> > >> Signed-off-by: Qu Wenruo <quwenruo@xxxxxxxxxxxxxx> > >> --- > >> Documentation/Makefile | 2 +- > >> Documentation/btrfs-zero-log.txt | 39 +++++++++++++++++++++++++++++++++++++++ > >> 2 files changed, 40 insertions(+), 1 deletion(-) > >> create mode 100644 Documentation/btrfs-zero-log.txt > >> > >> diff --git a/Documentation/Makefile b/Documentation/Makefile > >> index e002d53..de06629 100644 > >> --- a/Documentation/Makefile > >> +++ b/Documentation/Makefile > >> @@ -11,7 +11,7 @@ MAN8_TXT += btrfs-image.txt > >> MAN8_TXT += btrfs-map-logical.txt > >> MAN8_TXT += btrfs-show-super.txt > >> MAN8_TXT += btrfstune.txt > >> -#MAN8_TXT += btrfs-zero-log.txt > >> +MAN8_TXT += btrfs-zero-log.txt > >> #MAN8_TXT += fsck.btrfs.txt > >> #MAN8_TXT += mkfs.btrfs.txt > >> > >> diff --git a/Documentation/btrfs-zero-log.txt b/Documentation/btrfs-zero-log.txt > >> new file mode 100644 > >> index 0000000..e3041fa > >> --- /dev/null > >> +++ b/Documentation/btrfs-zero-log.txt > >> @@ -0,0 +1,39 @@ > >> +btrfs-zero-log(8) > >> +================= > >> + > >> +NAME > >> +---- > >> +btrfs-zero-log - clear out log tree > >> + > >> +SYNOPSIS > >> +-------- > >> +'btrfs-zero-log' <dev> > >> + > >> +DESCRIPTION > >> +----------- > >> +'btrfs-zero-log' will remove the log tree if log tree is corrupt, which will > >> +allow you to mount the filesystem again. > >> + > >> +The common case where this happens has been fixed a long time ago, > >> +so it is unlikely that you will see this particular problem. > > > > A note on this one: this can happen if your SSD rites things in the > > wrong order or potentially writes garbage when power is lost, or before > > locking up. > > I hit this problem about 10 times and it wasn't a btrfs bug, just the > > drive doing bad things. > > And -o recovery didn't work around it? My understanding is that -o > recovery will skip reading the log. No, I'm pretty sure we've had people with problems with the log where -orecovery didn't help, but -oro,recovery allowed it to be mounted, because -ro didn't try to replay the log. Hugo. -- === Hugo Mills: hugo@... carfax.org.uk | darksatanic.net | lug.org.uk === PGP key: 65E74AC0 from wwwkeys.eu.pgp.net or http://www.carfax.org.uk --- If the first-ever performance is the première, is the --- last-ever performance the derrière?
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