| 1 |
> I have seen where people use dd to do this sort of thing to. I read |
| 2 |
> somewhere that if you do a dd and put in all 1's, then all 0's then back |
| 3 |
> again that it is very hard to get any data back off the drive. I think |
| 4 |
> if you do it like over a dozen times, it is deemed impossible to get |
| 5 |
> anything back. I think that is the Government standard of it's gone. |
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| 7 |
I've heard the old attacks to recover data from a zerod drive are no |
| 8 |
longer viable for disks of greater capacity than about 10G. I haven't |
| 9 |
seen the information myself, however. |
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| 11 |
A single pass using dd would probably a good way of detecting any |
| 12 |
existing bad blocks, so a smartctl then dd then smartctl again and a |
| 13 |
diff of the results may be interesting. |
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| 15 |
I just use a 1TB software mirror for my backups. |
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