@@ -230,9 +230,9 @@ test is used instead of a fast read-only test.
.TP
.B \-C " cluster-size"
Specify the size of cluster in bytes for filesystems using the bigalloc
-feature. Valid cluster-size values are from 2048 to 256M bytes per
-cluster. This can only be specified if the bigalloc feature is
-enabled. (See the
+feature. Valid cluster-size values are from 2048 to 128M bytes per
+cluster based on filesystem blocksize. This can only be specified if the
+bigalloc feature is enabled. (See the
.B ext4 (5)
man page for more details about bigalloc.) The default cluster size if
bigalloc is enabled is 16 times the block size.