All linux blocks are currently 1024 bytes. Old kernels may report blocks as 512
bytes, 2048 bytes, or 4096 bytes.
Linux 块大小 1KB，
[root@backoffice01 ~]# tune2fs -l /dev/xvda1 | grep -i block
Block count: 5242624
Reserved block count: 262131
Free blocks: 4121812
First block: 0
Block size: 4096
Reserved GDT blocks: 1022
Blocks per group: 32768
Inode blocks per group: 512
Flex block group size: 16
Reserved blocks uid: 0 (user root)
Reserved blocks gid: 0 (group root)
Journal backup: inode blocks
v-dev-redis01:/root# tune2fs -l /dev/sda1 | grep -i block
Block count: 204800
Reserved block count: 10240
Free blocks: 168663
First block: 1
Block size: 1024
Reserved GDT blocks: 256
Blocks per group: 8192
Inode blocks per group: 256
Flex block group size: 16
Reserved blocks uid: 0 (user root)
Reserved blocks gid: 0 (group root)
Journal backup: inode blocks