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-rw-r--r--sbin/vinum/vinum.87
1 files changed, 7 insertions, 0 deletions
diff --git a/sbin/vinum/vinum.8 b/sbin/vinum/vinum.8
index a53e352..6eb4f79 100644
--- a/sbin/vinum/vinum.8
+++ b/sbin/vinum/vinum.8
@@ -2647,3 +2647,10 @@ subsystem so
.Xr vinum 4
volumes cannot be used with GEOM based facilities like
.Xr gbde 8 .
+.Pp
+.Xr vinum 4
+is unable to function on devices with a block size other than
+.Dv DEV_BSIZE
+(512), so cannot be used on swap-backed
+.Xr md 4
+devices.
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