[syslinux:pathbased] menu docs: document MENU SAVE caveat with RAID-1

[syslinux-bot for Ferenc Wagner]

Commit-ID:  cd508a8c968deda3b91a6c46ba1a1572753f3951
Gitweb:     http://syslinux.zytor.com/commit/cd508a8c968deda3b91a6c46ba1a1572753f3951
Author:     Ferenc Wagner <wferi at niif.hu>
AuthorDate: Mon, 31 May 2010 18:40:24 +0200
Committer:  H. Peter Anvin <hpa at linux.intel.com>
CommitDate: Mon, 7 Jun 2010 14:54:45 -0700

menu docs: document MENU SAVE caveat with RAID-1

The usual RAID-1 ADV constraint...

Signed-off-by: Ferenc Wagner <wferi at niif.hu>
Signed-off-by: H. Peter Anvin <hpa at linux.intel.com>


---
 doc/menu.txt |    7 ++++++-
 1 files changed, 6 insertions(+), 1 deletions(-)

diff --git a/doc/menu.txt b/doc/menu.txt
index c912c1d..af93558 100644
--- a/doc/menu.txt
+++ b/doc/menu.txt
@@ -309,7 +309,12 @@ MENU NOSAVE
 	On the other hand, it handles changes in the configuration
 	file gracefully.
 
-	The MENU SAVE information can be cleared with
+	NOTE: In software RAID-1 setups MENU SAVE only stores the
+	default label on the actual boot disk.  This may lead to
+	inconsistent reads from the array, or unexpectedly change the
+	default label after array resynchronization or disk failure.
+
+	The MENU SAVE information can be fully cleared with
 	"extlinux --reset-adv <bootdir>".
 
 	A MENU SAVE or MENU NOSAVE at the top of a (sub)menu affects