I managed to fix the issue by using "fdisk" and delete all corrupted partitions from number 20 to 64.
After that, Parted and GParted worked again: $ sudo parted /dev/sdb GNU Parted 3.3 Using /dev/sdb Welcome to GNU Parted! Type 'help' to view a list of commands. (parted) p Model: ATA KINGSTON SA400S3 (scsi) Disk /dev/sdb: 240GB Sector size (logical/physical): 512B/512B Partition Table: gpt Disk Flags: Number Start End Size File system Name Flags 1 1049kB 17,8MB 16,8MB Microsoft reserved partition msftres 2 17,8MB 240GB 240GB ntfs Basic data partition msftdata 3 240GB 240GB 533MB ntfs hidden, diag ----- And so does "gdisk": $ sudo gdisk /dev/sdb GPT fdisk (gdisk) version 1.0.5 Partition table scan: MBR: protective BSD: not present APM: not present GPT: present Found valid GPT with protective MBR; using GPT. Command (? for help): ----- Thanks, Samuel Phan
