hammer - Add tunable vfs.hammer.skip_redo

[dragonfly.git] / share / man / man5 / hammer.5

diff --git a/share/man/man5/hammer.5 b/share/man/man5/hammer.5
index 1f79973..f6e076c 100644 (file)
--- a/share/man/man5/hammer.5
+++ b/share/man/man5/hammer.5
@@ -29,7 +29,7 @@
 .\" OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 .\" SUCH DAMAGE.
 .\"
-.Dd April 19, 2011
+.Dd August 14, 2012
 .Dt HAMMER 5
 .Os
 .Sh NAME
@@ -103,6 +103,24 @@ After a non-graceful system shutdown,
 file systems will be brought back into a fully coherent state
 when mounting the file system, usually within a few seconds.
 .Pp
+In the unlikely case
+.Nm
+mount fails due redo recovery (stage 2 recovery) being corrupted, a
+workaround to skip this stage can be applied by setting the following tunable:
+.Bd -literal -offset indent
+vfs.hammer.skip_redo=<value>
+.Ed
+.Pp
+Possible values are:
+.Bl -tag -width indent
+.It 0
+Run redo recovery normally and fail to mount in the case of error (default).
+.It 1
+Run redo recovery but continue mounting if an error appears.
+.It 2
+Completely bypass redo recovery.
+.El
+.Pp
 Related commands:
 .Xr mount_hammer 8
 .Ss Large File Systems & Multi Volume