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+What:           /sys/block/<disk>/stat
+Date:           February 2008
+Contact:        Jerome Marchand <jmarchan@redhat.com>
+Description:
+                The /sys/block/<disk>/stat files displays the I/O
+                statistics of disk <disk>. They contain 11 fields:
+                 1 - reads completed succesfully
+                 2 - reads merged
+                 3 - sectors read
+                 4 - time spent reading (ms)
+                 5 - writes completed
+                 6 - writes merged
+                 7 - sectors written
+                 8 - time spent writing (ms)
+                 9 - I/Os currently in progress
+                10 - time spent doing I/Os (ms)
+                11 - weighted time spent doing I/Os (ms)
+                For more details refer Documentation/iostats.txt
+
+
+What:           /sys/block/<disk>/<part>/stat
+Date:           February 2008
+Contact:        Jerome Marchand <jmarchan@redhat.com>
+Description:
+                The /sys/block/<disk>/<part>/stat files display the
+                I/O statistics of partition <part>. The format is the
+                same as the above-written /sys/block/<disk>/stat
+                format.