Partition 2 does not start on physical sector boundary. Disk /dev/sda: 465.8 GiB, 500107862016 bytes, 976773168 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 Disklabel type: dos Disk identifier: -- Device Boot Start End Sectors Size Id Type /dev/sda1 * 2048 976771579 976769532 465.8G 83 Linux Disk /dev/sdb: 1.8 TiB, 2000398934016 bytes, 3907029168 sectors 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: dos Disk identifier: -- Device Boot Start End Sectors Size Id Type /dev/sdb1 * 2048 3906250751 3906248704 1.8T 83 Linux /dev/sdb2 3906252798 3907028991 776194 379M 5 Extended /dev/sdb5 3906252800 3907028991 776192 379M 82 Linux swap / Solaris Disk /dev/sdc: 5.5 TiB, 6001075945472 bytes, 11720851456 sectors Units: sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 4096 bytes I/O size (minimum/optimal): 4096 bytes / 4096 bytes