Re: [tlug] Mysterious LVM issue: reserved space (not really LVM issue)

[jep200404 <jep200404@example.com>]

Birkir A. Barkarson wrote:

> If anyone has some experience with LVM I encountered some rather
> mysterious and spooky things when using it.
> 
> In short I was copying about 216GB from one HD to another which had an
> LVM VG with exactly 216GB free. The copy (cp -a) went well and except
> for some bad data on the original nothing was reported. Once done though
> the LVM drive reported 0 bytes free, 216GB used. Rather unexpected as I
> would have thought it would either have a few bytes left or it would
> have given me an error messages about the drive being full.

Some filesystems lie about how much space is free, holding some 
space in reserve. I've seen the behavior you described, 
with plain old ext3 filesystems. LVM might be irrelevant.