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Using dd with bad blocks on a harddrive?

Fresh5 days ago
Mar 15, 20269436 views
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Problem

I'm looking to use dd to make a clone of failing harddrive. My concern is there will be bad blocks for surely. So my question is with will a bad block leave a gap the size of the selected block-size(bs) or will it only be as big as the sector on the harddrive?

Error Output

dd

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Fix for: Using dd with bad blocks on a harddrive?

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I'm pretty sure it'll be the larger of the two. Let's say you're using a 512 byte block-size in , but your disk uses 4K sectors, and one of them is bad. All four 512-byte reads that tries to make of that 4K sector will fail, resulting in a 4K gap. Nā€¦

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