Received-SPF: pass (google.com: domain of linux-ext4-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18;
MIME-Version: 1.0
From:   Alok Jain <jain.alok103@gmail.com>
Date:   Mon, 15 Jun 2020 22:24:33 +0530
Message-ID: <CAG-6nk9hZUxDERrjbvwUReGtepnQA5bNWeNPyVa9x_+WCQ2W9w@mail.gmail.com>
Subject: Problem in updating UUID in ext4 FS on block device
To:     linux-ext4@vger.kernel.org
Content-Type: text/plain; charset="UTF-8"
Sender: linux-ext4-owner@vger.kernel.org
Precedence: bulk

Hi Expert,

 I am facing issue when I updated the block device UUID (ext4 file
system,  command: tune2fs -U random /dev/sdX1) and remount the FS,
sometime below error is coming while mounting the device.

 wrong fs type, bad option, bad superblock on /dev/sde1,
 missing codepage or helper program, or other error
 In some cases useful info is found in syslog - try
 dmesg | tail  or so

  I had to run fsck utility to fix the corrupt superblock which update
the UUID back to original value, looks like UUID is not getting
updated in all the superblocks.

Any idea how to replicate UUID to all the superblock? and also check
if it got replicated properly

Thanks in advance!
Alok