Originally Posted by bone1959
How long should it take to zero a 750 gig HDD??
that depends on the block size you specify for the dd command, because each block is a separate disk access. If you use a block size of 8kB (which is default, AFAIR), you need short of 100'000'000 disk requests. Each of them may require a few milliseconds to complete, so that sums up to an awful lot of time. I remember that I recently made an image file of an 8GB partition, and that took several minutes. And just two days ago, I formatted a 2TB drive to ext3, which took about half an hour just to create a blank file system.
So now it's up to you to make a guess.
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