LVM - resize help

[opethdisciple]

Think I may have made a mistake and was wondering if it's possible to rescue the situation.

I wanted to reduce /home and increase / (root)

/home was mounted on lv_home (443GiB) and / was mounted on lv_root (50GiB).

I wanted to reduce home by 350GB and give this space to /

I only got as far as trying to reduce home and now cant mount the home directory this is what I did:

sudo umount -v /home
e2fsck -ff /dev/mapper/lv_home
sudo e2fsck -ff /dev/mapper/lv_home
sudo resize2fs /dev/mapper/lv_home 350G
df -h
sudo lvreduce -L -350G /dev/mapper/lv_home
sudo mount /dev/mapper/lv_home /home

I get a message:

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

I followed the instructions from the first guide I found which I now see are different to another guide. lv_home is showing up as about 100G but with the error above.

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My question is, how do I rescue this situation? Can I just format using fdisk the /dev/mapper/lv_home volume and then mount /home?

Or am I looking at having to rebuild the server?

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Looking at the dmesg log it shows this:

EXT4-fs (dm-2): bad geometry: block count 91750400 exceeds size of device (24543232 blocks)

 

[Sp00n]

You need to run resize2fs again against don't you, I think?

 

[opethdisciple]

Well I fixed it in the end by using fdisk on /dev/mapper/lv_home.

Luckily there wasnt any data so no harm done. But in the future if there was data on /dev/mapper/lv_home then I would have been in trouble!

 

[Swanster]

I think the problem was that you resized the lv_home filesystem to 350GB, but reduced the logical volume by 350GB (making it 93GB).
Not sure how you could have recovered it, though...