[PATCH] Process Events - Header Cleanup

[powerpc.git] / Documentation / md.txt

diff --git a/Documentation/md.txt b/Documentation/md.txt
index 866a1a8..03a13c4 100644 (file)
--- a/Documentation/md.txt
+++ b/Documentation/md.txt
@@ -200,6 +200,36 @@ All md devices contain:
      This can be written only while the array is being assembled, not
      after it is started.
 
      This can be written only while the array is being assembled, not
      after it is started.
 

+   new_dev
+     This file can be written but not read.  The value written should
+     be a block device number as major:minor.  e.g. 8:0
+     This will cause that device to be attached to the array, if it is
+     available.  It will then appear at md/dev-XXX (depending on the
+     name of the device) and further configuration is then possible.
+
+   sync_speed_min
+   sync_speed_max
+     This are similar to /proc/sys/dev/raid/speed_limit_{min,max}
+     however they only apply to the particular array.
+     If no value has been written to these, of if the word 'system'
+     is written, then the system-wide value is used.  If a value,
+     in kibibytes-per-second is written, then it is used.
+     When the files are read, they show the currently active value
+     followed by "(local)" or "(system)" depending on whether it is
+     a locally set or system-wide value.
+
+   sync_completed
+     This shows the number of sectors that have been completed of
+     whatever the current sync_action is, followed by the number of
+     sectors in total that could need to be processed.  The two
+     numbers are separated by a '/'  thus effectively showing one
+     value, a fraction of the process that is complete.
+
+   sync_speed
+     This shows the current actual speed, in K/sec, of the current
+     sync_action.  It is averaged over the last 30 seconds.
+
+

 As component devices are added to an md array, they appear in the 'md'
 directory as new directories named
       dev-XXX
 As component devices are added to an md array, they appear in the 'md'
 directory as new directories named
       dev-XXX


@@ -250,6 +280,13 @@ Each directory contains:
         the device before this offset us not touched, unless it is
         used for storing metadata (Formats 1.1 and 1.2).
 
         the device before this offset us not touched, unless it is
         used for storing metadata (Formats 1.1 and 1.2).
 

+      size
+        The amount of the device, after the offset, that can be used
+        for storage of data.  This will normally be the same as the
+       component_size.  This can be written while assembling an
+        array.  If a value less than the current component_size is
+        written, component_size will be reduced to this value.
+

 
 An active md device will also contain and entry for each active device
 in the array.  These are named
 
 An active md device will also contain and entry for each active device
 in the array.  These are named