The primary GPT table is corrupt, but the backup appears OK, so that will be used. Disk /dev/sda: 931.51 GiB, 1000204886016 bytes, 1953525168 sectors Disk model: WDC WD1002FAEX-0 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: -- The primary GPT table is corrupt, but the backup appears OK, so that will be used. Disk /dev/sdb: 931.51 GiB, 1000204886016 bytes, 1953525168 sectors Disk model: WDC WD1002FAEX-0 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: -- Disk /dev/sdc: 465.76 GiB, 500107862016 bytes, 976773168 sectors Disk model: WDC WDBNCE5000PN 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/sdc1 2048 411647 409600 200M EFI System /dev/sdc2 411648 2508799 2097152 1G Linux filesystem /dev/sdc3 2508800 976773119 974264320 464.6G Linux LVM Disk /dev/mapper/XXXXXXXXXXXX 7.87 GiB, 8451522560 bytes, 16506880 sectors Units: sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk /dev/mapper/XXXXXXXXXXXX 50 GiB, 53687091200 bytes, 104857600 sectors Units: sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk /dev/zram0: 8 GiB, 8589934592 bytes, 2097152 sectors Units: sectors of 1 * 4096 = 4096 bytes Sector size (logical/physical): 4096 bytes / 4096 bytes I/O size (minimum/optimal): 4096 bytes / 4096 bytes Disk /dev/md0: 931.39 GiB, 1000070512640 bytes, 1953262720 sectors Units: sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk /dev/mapper/XXXXXXXXXXXX 406.69 GiB, 436681572352 bytes, 852893696 sectors Units: sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes