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-rw-r--r--sbin/dump/dump.813
1 files changed, 12 insertions, 1 deletions
diff --git a/sbin/dump/dump.8 b/sbin/dump/dump.8
index 7842a33..efe7a76 100644
--- a/sbin/dump/dump.8
+++ b/sbin/dump/dump.8
@@ -210,9 +210,20 @@ This option is to notify
that it is dumping a live file system.
To obtain a consistent dump image,
.Nm
-takes a snapshot of the file system and
+takes a snapshot of the file system in the
+.Pa .snap
+directory in the root of the filesystem being dumped and
then does a dump of the snapshot.
The snapshot is removed when the dump is complete.
+If the
+.Pa .snap
+directory does not exist in the root of the filesystem being dumped,
+the dump will fail.
+This problem can be corrected by creating a
+.Pa .snap
+directory in the root of the filesystem to be dumped;
+its owner should be root, its group should be operator,
+and its mode should be 0770.
.It Fl n
Whenever
.Nm
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