[PVE-User] BTRFS...

Gilberto Nunes gilberto.nunes32 at gmail.com
Wed Feb 3 11:04:08 CET 2016

So, that's the idea...
The FS I want grown, is /dev/vda9 that is mounted as /opt.
I resize the this via PVE web portal.
The /dev/vda had 2 TB and I added more 500 GB...
Cfdisk, and parted as well, show that just after /dev/vda9, I have more 500
GB free space....
I just want to know, with some certain degree, that I will not loose my
data under /opt.... All I need...
But, as you said: MAKE BACKUP!
The problem is: backup from a 2 TB image, that is use as mail server is
very slow and problematic....
But I will give a way!
Thanks btw!

2016-02-03 5:07 GMT-02:00 Wolfgang Bumiller <w.bumiller at proxmox.com>:

> > On February 2, 2016 at 8:07 PM Adam Thompson <athompso at athompso.net>
> wrote:
> >
> > On 16-02-02 11:24 AM, Gilberto Nunes wrote:
> > > Hi
> > >
> > > And what if I work with BTRFS inside the VM???
> > > The FS where VM image lay could be any other FS... Currently, I am use
> > > GlusterFS + XFS.
> > > I need LVM or BRTFS inside the VM, in order to resize disk partition...
> > > And I am between LVM or BRTFS....
> >
> > Only if you need to do *online* resizes (without unmounting the
> > filesystem).  If you can live with unmounting the filesystem, plain old
> > ext3 (and ext4) can do what you need.  Of course, if it's the root
> > filesystem you need to resize, the only way to unmount it is to shut
> > down the VM and reboot it in single-user mode.  I think you might need
> > to boot off a CD to resize the root fs, can't remember if there's a way
> > around it.
> Actually resize2fs works on mounted file systems as long as you're only
> growing it and not shrinking it, including the root filesystem.
> >><<
> > On February 2, 2016 at 4:38 PM Gilberto Nunes <
> gilberto.nunes32 at gmail.com> wrote:
> > That's other doubt... I will lose data if I do it with parted
> resizepart???
> No, but naturally you should make a backup just in case, especially when
> you do this the first time.
> Of course there are some limitations when you need online resizing without
> downtime. Then you can only grow a partition without moving it. In other
> words you can only resize a partition if there's physical free space
> directly
> after it. (Most of the time this is the case since you usually have the
> boot partition first and then the root and maybe a home or data partition,
> and most of the time that last one is the one you want to resize ;-) )
> Eg. with [boot, root, home] after resizing the physical disk you end up
> with
> [boot, root, home, <frees space>], so you can only resize the home
> partition.
> If you can afford down time you can also use parted to move partitions so
> that
> you can resize any of them.  This however takes a lot longer and is a bit
> more risky, so in this case you should _always_ make a backup even if you
> know
> what you're doing.


Gilberto Ferreira
+55 (47) 9676-7530
Skype: gilberto.nunes36
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