The backup GPT table is corrupt, but the primary appears OK, so that will be used. Disk /dev/sda: 7.28 TiB, 8001563222016 bytes, 15628053168 sectors Disk model: TOSHIBA MG06ACA8 Units: sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 4096 bytes I/O size (minimum/optimal): 4096 bytes / 4096 bytes Disklabel type: gpt Disk identifier: -- Device Start End Sectors Size Type /dev/sda1 2048 15628052479 15628050432 7.3T Linux filesystem Disk /dev/sdd: 7.28 TiB, 8001563222016 bytes, 15628053168 sectors Disk model: TOSHIBA MG06ACA8 Units: sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 4096 bytes I/O size (minimum/optimal): 4096 bytes / 4096 bytes Disklabel type: gpt Disk identifier: -- Device Start End Sectors Size Type /dev/sdd1 2048 15628052479 15628050432 7.3T Linux filesystem Disk /dev/sdc: 7.28 TiB, 8001563222016 bytes, 15628053168 sectors Disk model: TOSHIBA MG06ACA8 Units: sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 4096 bytes I/O size (minimum/optimal): 4096 bytes / 4096 bytes Disklabel type: gpt Disk identifier: -- Device Start End Sectors Size Type /dev/sdc1 2048 15628052479 15628050432 7.3T Linux filesystem Disk /dev/sdb: 931.51 GiB, 1000204886016 bytes, 1953525168 sectors Disk model: TS1TSSD220Q Units: sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disklabel type: gpt Disk identifier: -- Device Start End Sectors Size Type /dev/sdb1 2048 1050623 1048576 512M EFI System /dev/sdb2 1050624 1951522815 1950472192 930.1G Linux filesystem /dev/sdb3 1951522816 1953523711 2000896 977M Linux swap