How to find filesystem block size in linux or Unix ?
Today we will look how to find a filesystem blocksize in Linux or Unix Operating System.
There are many ways, however the preferred ways are quoted below.
1. Use blockdev command.
[root@ngelinux ~]# blockdev --getbsz /dev/sdb2 4096
2. Use of tune2fs command
[root@ngelinux ~]# tune2fs -l /dev/sdb2 | grep -i "block size" Block size: 4096 [root@ngelinux ~]#
Tip: Use filefrag command to verify if a particular file has same blocksize on the filesystem. See the blocksize in output.
[root@ngelinux ~]# filefrag -v /testext/testfile Filesystem type is: ef53 Filesystem cylinder groups approximately 15 File size of /testext/testfile is 6 (1 block of 4096 bytes) ext: logical_offset: physical_offset: length: expected: flags: 0: 0.. 0: 1024.. 1024: 1: merged,eof /testext/testfile: 1 extent found, perfection would be -1 extent