[PATCH] md: count corrected read errors per drive

[mirror_ubuntu-jammy-kernel.git] / Documentation / md.txt

diff --git a/Documentation/md.txt b/Documentation/md.txt
index fd43fd2cad2fb19c3dfce1bc45ffd31bf59f05b4..a3eadf8e17016090418eadf0b22f46d2ebc3d568 100644 (file)
--- a/Documentation/md.txt
+++ b/Documentation/md.txt
@@ -222,6 +222,17 @@ Each directory contains:
                         of being recoverred to
        This list make grow in future.
 
+      errors
+       An approximate count of read errors that have been detected on
+       this device but have not caused the device to be evicted from
+       the array (either because they were corrected or because they
+       happened while the array was read-only).  When using version-1
+       metadata, this value persists across restarts of the array.
+
+       This value can be written while assembling an array thus
+       providing an ongoing count for arrays with metadata managed by
+       userspace.
+
 
 An active md device will also contain and entry for each active device
 in the array.  These are named