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External hard drive no longer appears. How to try to recover contained data
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<blockquote data-quote="michelangelo" data-source="post: 1682734" data-attributes="member: 54225"><p>Thanks for the tip. I did zero out all of the data using disk utility. One pass. 7 hours for 2 TB. Then I redid my two partitions and two clones (each a clone, respectively, of my internal HD and my external HD). Not very difficult, quite time consuming for the mac (not for me, I was sleeping). After that, I did not notice any difference. If I get it right, the objective of this move was to zero all of the data which would map the bad sectors on the reformatted (resurrected) drive, hence my drive would be a more reliable clone after than before. How can I test that this objective (reliability) is achieved ?</p><p></p><p>Would I have attained the same results with one full defrag (in each of the two partitions) with iDefrag ?</p><p></p><p>How about Spinrite ?</p></blockquote><p></p>
[QUOTE="michelangelo, post: 1682734, member: 54225"] Thanks for the tip. I did zero out all of the data using disk utility. One pass. 7 hours for 2 TB. Then I redid my two partitions and two clones (each a clone, respectively, of my internal HD and my external HD). Not very difficult, quite time consuming for the mac (not for me, I was sleeping). After that, I did not notice any difference. If I get it right, the objective of this move was to zero all of the data which would map the bad sectors on the reformatted (resurrected) drive, hence my drive would be a more reliable clone after than before. How can I test that this objective (reliability) is achieved ? Would I have attained the same results with one full defrag (in each of the two partitions) with iDefrag ? How about Spinrite ? [/QUOTE]
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External hard drive no longer appears. How to try to recover contained data
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