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-rw-r--r--Documentation/ide/warm-plug-howto.txt5
1 files changed, 5 insertions, 0 deletions
diff --git a/Documentation/ide/warm-plug-howto.txt b/Documentation/ide/warm-plug-howto.txt
index d5885468b072..98152bcd515a 100644
--- a/Documentation/ide/warm-plug-howto.txt
+++ b/Documentation/ide/warm-plug-howto.txt
@@ -11,3 +11,8 @@ unplug old device(s) and plug new device(s)
# echo -n "1" > /sys/class/ide_port/idex/scan
done
+
+NOTE: please make sure that partitions are unmounted and that there are
+no other active references to devices before doing "delete_devices" step,
+also do not attempt "scan" step on devices currently in use -- otherwise
+results may be unpredictable and lead to data loss if you're unlucky
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