Linux查看系统块大小

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

 

 

 

方法3：tune2fs命令查看block size

 

[root@mylnx ~]# tune2fs -l /dev/sda1 | grep "block size"

block size:               1024

 

这里可以是/dev/sda1， 对于lvm文件系统，可以使用下面命令

 

# tune2fs -l /dev/mapper/volgroup04-logvol00 | grep -i 'block size'

block size:               4096

 

方法4：blockdev命令查看block size

 

[root@kerrydb ~]# blockdev --getbsz /dev/sda2

4096