是不是这么看
Disk /dev/sda: 931.5 GiB, 1000204886016 bytes, 1953525168 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: 0x4591c172
Device Boot Start End Sectors Size Id Type
/dev/sda1 * 2048 409599 407552 199M 83 Linux
/dev/sda2 409600 1951375359 1950965760 930.3G 83 Linux
/dev/sda3 1951375360 1953523711 2148352 1G 82 Linux swap / Solaris