However if you're out of guarantee and want to remap or discard the broken sectors, would you mind telling how the drive behaves afterwards?
I decided to go with the Low Level Format
tool at HDDGuru first rather than diving straight in with MHDD.
At the moment the results seem positive, transferring files to it at about 70-90MB/s.
Interesting to note that S.M.A.R.T. doesn't show any indication of sectors being remapped. So at the moment I'll let it run with volatile data to see how it goes.
As I said, the drive is only around 3 months old so I'm making a guess that possibly the Conficker virus I caught might have glitched it since the two events were coincident.
EDIT: Over 500GB copied to it and it's still working OK.@nite_monkey:
This may help, (or not), determine if the problem is a specific drive. Open up the Resource Monitor and switch to the Disk tab, in the Disk Activity pane on the left is a column called Response Time.
With that open, start copying files on both drives but
only to the same physical drive. eg. If the whole of one drive is C: and the other is E:, then start copy files from C: -> C: and E: -> E:
I found that the response time for one drive would blow out to 3+ seconds when the system would apparently "freeze", (obviously it was hitting bad sectors at this point), whereas other drives would still have significantly lower response times, (unless the transaction also involved the faulty drive).
It helps if you can minimise OS writes during the test period, eg. disable Pagefile if you have enough memory, stop the indexing service, etc, etc.