Marking Bad Blocks on Logical Volume Filesystem with Multiple Physical Volumes

[pogo7]

Hey everyone,


I've encountered a situation where I needed to mark bad blocks on a ext4 - Logical Volume (LV) filesystem that spans multiple Physical Volumes (PVs) within a Volume Group (VG). I wanted to share my approach and confirm if it's the correct way to handle this scenario.


I have a setup where my LV spans across two HDDs (sda and sdc) within a VG.
One of the HDDs (sda) has bad blocks that need to be marked to prevent data corruption.

Approach:

Identify Bad Blocks:

I used the badblocks command to scan the HDD (sda) and generated a list of bad blocks.
Command:

sudo badblocks -sv /dev/sda > badblocks_sda.txt

(would -w be beneficial?)


Mark Bad Blocks on LV filesystem:


After obtaining the list of bad blocks, I use fsck -l to mark them on the LV filesystem.

Command:

sudo fsck -l badblocks.txt /dev/nfs_dir_vg/nfs_dir_lv

Questions:


Does this approach correctly mark bad blocks on the LV filesystem spanning multiple PV?
Are there any potential pitfalls or better approaches to handle this scenario?
I would appreciate any insights or feedback on this approach. Thank you!