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Date: Mon, 15 Jun 2020 22:24:33 +0530 From: Alok Jain <jain.alok103@...il.com> To: linux-ext4@...r.kernel.org Subject: Problem in updating UUID in ext4 FS on block device 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
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