This is not the only post I've on here about my current issue, but thought that I'd make separate topic as they have different aspects to them.
Apologies if I have this wrong.
So to the matter in hand ...
I'm trying to recover the data (only copy of family photos etc) from a 3TB external disk.
I have spanned a 1.5 and 2.0TB to form a 3.5TB drive and the two disks are sat in a dual SATA USB3 docking station.
I used this command in terminal
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sudo dd if=/dev/rdisk1 of=/dev/rdisk4 bs=1024 conv=noerror,sync
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sudo kill -INFO 835
So I guess so far so good.
My concern and I'm after confirmation that I'm doing the right thing, is that once I have the dd clone of the 3TB disk then R-Studio will look at the 3.5TB drive and be able to recover any of the data (hidden by the way formatting works) from the platters.
The 3TB disk created issues for R-Studio because of the amount of I/O errors generated. I have changed the cables and caddy for the 3TB drive and the same thing happened, I/O errors.