diff --git a/_posts/sysadm/2023-06-24-directly-attache-storage-with-redundancy-and-integrity-using-lvm-lvmraid.tl b/_posts/sysadm/2023-06-24-directly-attache-storage-with-redundancy-and-integrity-using-lvm-lvmraid.tl
index 08360c2..6a50344 100644
--- a/_posts/sysadm/2023-06-24-directly-attache-storage-with-redundancy-and-integrity-using-lvm-lvmraid.tl
+++ b/_posts/sysadm/2023-06-24-directly-attache-storage-with-redundancy-and-integrity-using-lvm-lvmraid.tl
@@ -40,6 +40,8 @@ on LV:
 # lvcreate --type raid1 --mirrors 1 -n backup -L 4t vgbackup /dev/sda /dev/sdb
 # cat /sys/class/block/nvme0n1/queue/logical_block_size
 512
+# dumpe2fs -h /dev/vgbackup/backup | grep 'Block size'
+Block size:               4096
 # lvconvert --raidintegrity y --raidintegrityblocksize 4096 --raidintegritymode bitmap /dev/vgbackup/backup
 # mkfs.ext4 -b 4096 -O ^has_journal /dev/vgbackup/backup
 {% endhighlight %}