Support fixing of byte-swapped superblocks.

Good for moving between little-endian and big-endian.
Still needs documentation.

Signed-off-by: Neil Brown <neilb@cse.unsw.edu.au>

1 files changed, 13 insertions, 0 deletions

diff --git a/mdadm.8 b/mdadm.8
index b0ac74a..1ecdac2 100644
--- a/mdadm.8
+++ b/mdadm.8
@@ -525,6 +525,7 @@ argument given to this flag can be one of
 .BR sparc2.2 ,
 .BR summaries ,
 .BR resync ,
+.BR byteorder ,
 or
 .BR super-minor .
 
@@ -556,6 +557,18 @@ to perform a "resync" pass to make sure that all redundant information
 is correct.
 
 The
+.B byteorder
+option allows arrays to be moved between machines with different
+byte-order.
+When assembling such an array for the first time after a move, giving 
+.B "--update=byteorder"
+will cause
+.I mdadm
+to expect superblocks to have their byteorder reversed, and will
+correct that order before assembling the array.  This is only valid
+with original (Verion 0.90) superblocks.
+
+The
 .B summaries
 option will correct the summaries in the superblock. That is the
 counts of total, working, active, failed, and spare devices.