[CentOS] is it possible to resive /var online?

[JohnS]

On Sun, 2010-05-02 at 17:13 -0400, Kwan Lowe wrote:
> On Sun, May 2, 2010 at 5:01 PM, Rudi Ahlers <rudiahlers at gmail.com> wrote:
> 
> >
> > heh, there's plenty space left on the drive:
> >
> > [root at zaxen02 ~]# pvscan
> >   PV /dev/md1   VG LVM01   lvm2 [232.69 GB / 141.69 GB free]
> >   Total: 1 [232.69 GB] / in use: 1 [232.69 GB] / in no VG: 0 [0   ]
> >
> > As far as I know, one needs to unmount a volume in order to resize it, but
> > /var can't be unmounted.
> 
> With LVM you don't need to unmount /var. You can do it on a running
> system with the following caveats:
> 
> 1) You'll need some free space on /var. I.e., not extra space in the
> volume group, but a little extra space in the /var partition itself.
> In other words, don't try to resize a completely full /var partition.
> 
> 2) There is a possibility that you'll need to resize some metadata. If
> so, this has to be done offline via a boot disk for /var.
---
Sounds good but I really do wonder if he has a hardware raid controller
that does not support resizing of Linux LVM on top of the HW Raid Volume
Set??  No one asked that part.

John