Bedankt Bloom, via schijfgereedschap had ik al geprobeerd, maar dat lukt niet. Daar wordt wel aangegeven, dat de schijf gezond is.
Deze melding krijg ik in de terminal.
Failed to read last sector (3907027119): Ongeldig argument
HINTS: Either the volume is a RAID/LDM but it wasn't setup yet,
or it was not setup correctly (e.g. by not using mdadm --build ...),
or a wrong device is tried to be mounted,
or the partition table is corrupt (partition is smaller than NTFS),
or the NTFS boot sector is corrupt (NTFS size is not valid).
Failed to mount '/dev/sdb1': Ongeldig argument
The device '/dev/sdb1' doesn't seem to have a valid NTFS.
Maybe the wrong device is used? Or the whole disk instead of a
partition (e.g. /dev/sda, not /dev/sda1)? Or the other way around?