Yep.  Look at http://www.tldp.org/HOWTO/LVM-HOWTO/extendlv.html

The caveat is that you need to have patched your kernel with the ext2online patch, which I believe is fairly common nowadays.  Earlier wasn't the case, which was one reason why on some of my old machines (I'm talking 4+ years) they're using reiserfs.

-Mike

Austin Godber wrote: 
Wait, you have been able to resize mounted ext3 partitions?  I didn't  
think that was possible?

Austin

On Apr 15, 2008, at 10:53 AM, Mike Bydalek wrote:
  
I'll say that I've been resizing production machines for a few years  
now
without any issues.  This includes ext3 and reiserfs.  One of the
partitions I am frequently resizing contains our Scalix mail store.   
So
far, I haven't had any issues with locking, db's, etc.

-Mike

der.hans wrote:
    
moin moin,

is it generally safe to resize, move, etc. an LVM partition without
unmounting the partitions on top of it?

How about resizing ext3 on the fly as well?

reiserfs? Other Free FSen?

It worked fine for me yesterday in a VM, but I wasn't really doing
anything in the VM, except playing with the LVM setup.

That situation doesn't really tell he what would happen on a real  
FS where
people and processes have lock files and are reading and writing  
files or
what a database thinks about having it's filesystem mucked with.

ciao,

der.hans

      
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