LVM2 lvextend doesn't give more space to use

jyaan

Is there something I'm doing wrong? I used the command

scherz0 · Apprentice Joined: 02 Oct 2008 Posts: 154

After extending the LV, you need to extend the FS also, since this is not automatic.

The command to use depends on the fs type. For example, see resize_reiserfs to extend a (mounted) reiser fs.

jyaan · Posted: Mon Jan 26, 2009 6:23 pm Post subject:

Oh, I'm using ext3. So the command is resize2fs? Can this be done on a live fs, or do I need to unmount?

drescherjm · Posted: Mon Jan 26, 2009 6:33 pm Post subject:

jyaan · Posted: Mon Jan 26, 2009 8:38 pm Post subject:

Thank you very much! It's working perfectly now.

Closed.

szatox · Advocate Joined: 27 Aug 2013 Posts: 3137

I will have to resize root partition with ext3 on lvm on device mapper, and... well, is it actually safe?
I have 2 options, I can either "just do it" or diassemble raid, do whatever is nessesery on the other drive, reboot to the new system and rebuild raid. In first case downside is if anything goes wrong I have to reinstall, in second case no matter what happens I have to rebuild raid.

So, question is: what can go wrong while I'm *extending* *mounted* *root* *ext3* filesystem on *lvm*?
Creating filesystem takes only a few seconds, will resize also be this fast?
If resize is interrupted due to any reasons, does it mean data lose and broken system?
Is it possible for resize2fs to simply screw up filesystem for no particular reason? (e.g. without hardware/power failure)

drescherjm · Posted: Fri Mar 14, 2014 12:49 pm Post subject:

You can just resize the root. It is safe to expand a live ext2/3/4. And yes it will be fast.
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szatox · Advocate Joined: 27 Aug 2013 Posts: 3137

Thanks, it seems it did go smoothly indeed