Linux系统的块大小（Block Size）怎么查看呢？下面总结一些常用的查看块大小（block size）的方法。
方法1： fdisk -l查看block size
[root@KerryDB ~]# fdisk -l /dev/sda1
Disk /dev/sda1: 106 MB, 106896384 bytes, 208782 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
Alignment offset: 512 bytes
方法2：stat命令查看block size
[root@KerryDB ~]# stat / | grep "IO Block"
Size: 260 Blocks: 0 IO Block: 4096 directory
[root@KerryDB ~]# stat -f /
File: "/"
ID: fd0000000000 Namelen: 255 Type: xfs
Block size: 4096 Fundamental block size: 4096
Blocks: Total: 13100800 Free: 11998605 Available: 11998605
Inodes: Total: 26214400 Free: 26170926