G'day
I have used ddrescue to read a failed seagate 1T hard drive. DDrescue reported 2 errors and was able to read exactly 500G. I am trying to figure out what sort of failure would result in the second half of the disc to disappear. I have been unable to determine how the sectors have been mapped to the the platters so I though you guys would have a better understanding than I. If anyone could help it would be greatly appreciated.

PS Most of my files have been recovered it was just the most recent that are full of zeros.

Michael

Confident to say that it is likely a firmware issue. It is a specific type of firmware issue. Do not think that firmware flashing/upgrading can help.
I do not know of any ordinary tools that could be used to address this issue.

A professional with the proper tools can resolve easily and fairly cheaply.

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Hard Disk Drive (HDD), Solid State Drive (SSD, SATA, NVMe, etc), USB Flash Drive and RAID Data Recovery Specialist in Massachusetts

Agreed it does sound like a firmware issue.
ie a corrupt translator would read sectors ok up to the point of corruption & then fail to read / access the sectors onwards (just like in your dd image where you then get data up to a certain point & then zeros) from that point onwards there is no data in your image so the fault on the drive would first need to be fixed ie in my example a translator regeneration with P-list.

As labtech has said it should be fairly cheap to fix for a pro.

Loki

Someone has performed an "internet fix" on it?

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You don't have to backup all of your files, just the ones you want to keep.

Seems to me also like a broken translator problem. Search a DR pro in your place. As loki said, it shouldn't be so expensive to fix. Except if the problem lies somewhere else.

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Data Recovery in Greece for 250euro + parts.

It looks like it needs "Internet" fix.
What is a boot message from diagnostic terminal? Read carefully what loki said.

Are you hinting at the internet fix for 0lba & bsy bug thats plastered all over the net?
Or they could try regenerating the translator using a terminal cable & the m0,6,3,,,,,22 command? Of cause if they accept the Risks of DIY?

Loki