Disk /dev/sdb: 298.9 GiB, 320072933376 bytes, 625142448 sectors Disk model: TOSHIBA MK3259GS 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 * 4096 1542966 1538871 751.4M 83 Linux /dev/sdb2 1542968 625138350 623595383 297.4G 83 Linux Disk /dev/mapper/XXXXXXXXXX 293.55 GiB, 315180974080 bytes, 615587840 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 Disk /dev/mapper/XXXXXXXXXX 3.84 GiB, 4097835008 bytes, 8003584 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 Disk /dev/mapper/XXXXXXXXXX 3.84 GiB, 4097310720 bytes, 8002560 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