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-rw-r--r--qmp-commands.hx3
1 files changed, 2 insertions, 1 deletions
diff --git a/qmp-commands.hx b/qmp-commands.hx
index 2077585dd3..034d51718c 100644
--- a/qmp-commands.hx
+++ b/qmp-commands.hx
@@ -1747,7 +1747,8 @@ Arguments:
- "job-id": Identifier for the newly-created block job. If omitted,
the device name will be used. (json-string, optional)
-- "device": device name to operate on (json-string)
+- "device": The device name or node-name of a root node whose writes should be
+ mirrored (json-string)
- "target": device name to mirror to (json-string)
- "replaces": the block driver node name to replace when finished
(json-string, optional)