Disk /dev/sda: 465.78 GiB, 500107862016 bytes, 976773168 sectors Disk model: WDC WD5000LPCX-2 Units: sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 4096 bytes I/O size (minimum/optimal): 4096 bytes / 1048576 bytes Disklabel type: gpt Disk identifier: -- Device Start End Sectors Size Type /dev/sda1 2048 524287 522240 255M EFI System /dev/sda2 524288 42467327 41943040 20G Linux filesystem /dev/sda3 42467328 50659327 8192000 3.9G Linux filesystem /dev/sda4 50659328 976773119 926113792 441.6G Linux filesystem