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Re: ext4 filesystem not recognised on new LVM volume

From: Andrei Borzenkov
Subject: Re: ext4 filesystem not recognised on new LVM volume
Date: Mon, 15 Dec 2014 14:51:57 +0300

On Mon, Dec 15, 2014 at 2:14 PM, John Lane <address@hidden> wrote:
> I have this weird problem occurring today.
> I have a disk that has LVM on it with a number of logical volumes
> containing ext4 filesystems.
> Grub has been able to see this disk and detect the ext4 filesystems
> without issue.
> This morning, I added a new logical volume, formatted it ext4 and put a
> system on it.
> Grub does not recognise the filesystem on the new volume. It sees the
> volume fine but that's all.
> The new volume works fine on any Linux system I connect it to. Grub
> still recognises the other volumes' filesystems fine, it's just the new
> ones.
> I'm puzzled. Any suggestions as to what I can look it?

It could be that it is so new that some features are not supported by
grub. Could you show output of "debugfs -R feature /dev/xxx" for this

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