did you checked hdd health by running hdd daignos
do you have another disk on the same system ? as in snaps you are trying to decrpyt Disk1 (are you sure its not pen drive ?)
what are the HDD option you have selected in BIOS ? like AHCI/IDE/Compatible/SATA Native Mode
what if you plug this hdd on another system and try to force decrypt ?
I forgot to mention that the HDD is already on a identical LATITUDE model.
We'll check if bios ATA Modes could be changed.
As we can see in disk Information screen, I'm almost sure, this is correct drive 1 (Machine ID, SBFS sector information...), that's partially encrypted, isn't it?
when we try to view disk number 0 we receive nothing special:
We'll try to Diagnose the HDD now, with corresponding tools as well.
what if you use wintech instead ?
you should not have used the force option - now the disk information is unreliable, we no longer know what's encrypted and what's not. :-(
Let's hope safetech didn't do anything at all.
As others said, use WinTech, and do a normal removal - if the pre-boot is still there and all ok. probably it will just decrypt fine. It might be worth looking around the sectors you tried to decrypt though and trying to work out what state they are in - put them back to encrypted if needed so the region list is correct.
Thank you for your answers,
but we assume now, that harddrive is the problem itself.
Dell self tests mention that HDD self-test is not successfull.