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Apologies, "HF" in my previous post should've read "HD", typo.

This is indeed a drive plugged into an external adaptor. So from what you have said about those, this mismatch of 4096 (internal) vs 512e (shown to the OS) is expected.

Should I be able to write the partition table at this point? Or ...

On the original machine I was able to copy the files to another disk. But I have one final question as I try to return the drive to a usable state without data loss (if possible) - my boot sector is showing as OK (from Advanced > Boot) but the backup boot sector is bad. I also have a warning that ...

Thanks for the advice, I will try this on Monday and report back.

Thanks again for your quick reply and continued help recuperation, it's much appreciated. Below is the smartmontools log (I ran this without any -d parameters)

smartctl 7.2 2020-12-30 r5155 [x86_64-w64-mingw32-w10-20H2] (sf-7.2-1)
Copyright (C) 2002-20, Bruce Allen, Christian Franke, www ...

With reference to my previous post:
https://forum.cgsecurity.org/phpBB3/viewtopic.php?f=5&t=10897&p=33365#p33365

I am trying to recover the drive at a different location and when trying to list the files on the found partition, it hangs for a few minutes and I get a message that the filesystem ...

With a sector size of 512 bytes - as outlined in the log - selecting GPT is mandatory for a 4TB drive. Please rerun Testdisk with this settings.


The files I'm trying to recover are from niche scientific software so I don't think PhotoRec would work, but please correct me if I'm wrong.

You can ...

I have a 4TB disk (non-bootable) that I am trying to recover. It has a single partition. The steps I have tried so far are Analyze (with Deep Search) and RebuildBS. RebuildBS failed (see screenshot), saying Boot sector is bad and Backup boot sector is bad. So I cannot List the files ("Can't open ...