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+DiskScan is a tool to scan a block device and check if there are unreadable
+sectors, in addition it uses read latency times as an assessment for a near
+failure as sectors that are problematic to read usually entail many retries.
+
+Diskscan will only perform reads in its disk surface scan so it is not
+destructive in any way and it will report on all the key metrics needed to
+decide if the disk is good or not.
+
+