badblocks -vws /dev/sda on a new 80GB laptop drive to make sure the disk is good. So far it's completed 2 passes and is working on it's third.
How many passes does it normally make?
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What you're seeing is not multiple passes, it's multiple test patterns within a single pass. The
-w option runs a single pass by default, and you can specify additional passes with the
However, a single pass with the
-w option tests four different patterns:
You can override this with the
-t option, to specifiy your own test pattern(s). E.g. to test only a single pattern you could do something like this:
badblocks -vwst 0x00 /dev/sda