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-rw-r--r--Documentation/admin-guide/device-mapper/writecache.rst1
1 files changed, 1 insertions, 0 deletions
diff --git a/Documentation/admin-guide/device-mapper/writecache.rst b/Documentation/admin-guide/device-mapper/writecache.rst
index 10429779a91a..6bf78b0446ac 100644
--- a/Documentation/admin-guide/device-mapper/writecache.rst
+++ b/Documentation/admin-guide/device-mapper/writecache.rst
@@ -20,6 +20,7 @@ Constructor parameters:
size)
5. the number of optional parameters (the parameters with an argument
count as two)
+
start_sector n (default: 0)
offset from the start of cache device in 512-byte sectors
high_watermark n (default: 50)