[CentOS] Looking for a life-save LVM Guru

Sun Mar 1 00:59:05 UTC 2015
James A. Peltier <jpeltier at sfu.ca>

----- Original Message -----
| On Sat, Feb 28, 2015 at 4:28 PM, James A. Peltier <jpeltier at sfu.ca> wrote:
| 
| > People who understand how to use the system do not suffer these problems.
| > LVM adds a bit of complexity for a bit of extra benefits.  You can't
| > blame LVM for user error.  Not having monitoring in place or backups is a
| > user problem, not an LVM one.
| 
| It's a good point. Suggesting the OP's problem is an example why LVM
| should not be used, is like saying dropped laptops is a good example
| why laptops shouldn't be used.
| 
| A fair criticism is whether LVM should be used by default with single
| disk system installations. I've always been suspicious of this choice.
| (But now, even Apple does this on OS X by default, possibly as a
| prelude to making full volume encryption a default - their "LVM"
| equivalent implements encryption as an LV level attribute called
| logical volume family.)
| 
| --
| Chris Murphy

There is no difference between a single disk system and a multi-disk system in terms of being able to dynamically resize volumes that reside on a volume group.  Having the ability to resize a volume to be either larger or smaller on demand is a really nice feature to have.  Did you make / too small and have space on home and you're using ext3/4 then simply resize the home logical volume to be smaller and all the free extents to /.  Pretty simple process really and it can be done online.  This is just one example.  There are others, but this has nothing to do with the OP.

Getting back to the OP, it would seem that you may be stuck in a position where you need to restore from backup.  Without having further details into what exactly is happening I fear you're not going to be able to recover.  I'd be available to talk off list if needed.

-- 
James A. Peltier
IT Services - Research Computing Group
Simon Fraser University - Burnaby Campus
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E-Mail  : jpeltier at sfu.ca
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