Document that the live dump command (`dump -L') creates its snapshot

in the .snap directory in the root of the filesystem being dumped.
Document that if the .snap directory is missing that it must be
created manually and that it should be owned by user root and
group operator and set to mode 770 before a live dump can be run.

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