[linux-lvm] Re: Serious LVM Problem

[linux-lvm] Re: Serious LVM Problem

[TNJazzGrass]

Unfortunately, I don't have any idea what to do to
accomplish this, or if I can even do it.

I created them with Disk Druid on FC3 a couple of
years ago and pretty much hadn't touched the machine
at all since then.  When I "upgraded" to FC5 a couple
of weeks ago, I unchecked all the boxes for the data
drives (hdb, hdd, hde, hdf and hdg) so they should
have been set to "do not format, keep existing data"
but I can't remember exactly what I did with hda
(which was also part of the array - at least some of
it).  

The box has been sitting in the corner for a month or
so while I try to figure out if it's salvageable.  I
have not done anything with it since FC5 was loaded,
except attempt to attach the Physical Volumes to the
LVM using the LVM Management GUI.

So I'm not sure what you mean by "restore the LV's
back" or how I would go about doing it.

I *may* have destroyed part of the array by
reinstalling the OS on /dev/hda...although I'm not
sure how it was set up in the first place.

If this is the case though, is the data that was on
the other physical volumes still actually accessible
in some way?  At this point I'm ready to start over,
but not before I've exhausted all my options.

Thanks,
Dirk

--- Josef Whiter wrote:
 
> Usually the best thing to do in this case is to try
> and restore the LV's back
> the way they were when you created them.  You
> wouldn't happen to know exactly
> how you created them in the first place would you? 
> If you do you can try and
> recreate the LV's exactly the way they were before
> and it should show up, kind
> of like if your partition table eats it and you have
> the exact geometry of the
> partition tables before they disappeared.  Thank
> you,
> 
> Josef

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Re: [linux-lvm] Serious LVM Problem

[John Ward]

I would suggest trying 'gpart' for recovery:

	http://home.pages.de/~michab/gpart/


> Message: 1
> Date: Wed, 4 Oct 2006 08:48:58 -0700 (PDT)
> From: TNJazzGrass <tnjazzgrass@yahoo.com>
> Subject: [linux-lvm] Serious LVM Problem
> To: linux-lvm@redhat.com
> Message-ID: <20061004154858.80196.qmail@web53005.mail.yahoo.com>
> Content-Type: text/plain; charset=iso-8859-1
> 
> Hi all,
> 
> This is my first post here and I'm fairly
> inexperienced with Linux, so please be gentle!
> 
...
> Can anyone provide me some troubleshooting assistance
> so I can determine what to do next?  I'm not afraid of
> the command line, but I'm not all that skilled on it
> either (so I'd need instructions that are fairly
> straightforward).

Re: [linux-lvm] Re: Serious LVM Problem

[paddy]

On Wed, Oct 04, 2006 at 12:19:47PM -0700, TNJazzGrass wrote:
> Unfortunately, I don't have any idea what to do to
> accomplish this, or if I can even do it.
> 
> I created them with Disk Druid on FC3 a couple of
> years ago and pretty much hadn't touched the machine
> at all since then.  When I "upgraded" to FC5 a couple
> of weeks ago, I unchecked all the boxes for the data
> drives (hdb, hdd, hde, hdf and hdg) so they should
> have been set to "do not format, keep existing data"
> but I can't remember exactly what I did with hda
> (which was also part of the array - at least some of
> it).  
> 
> The box has been sitting in the corner for a month or
> so while I try to figure out if it's salvageable.  I
> have not done anything with it since FC5 was loaded,
> except attempt to attach the Physical Volumes to the
> LVM using the LVM Management GUI.
> 
> So I'm not sure what you mean by "restore the LV's
> back" or how I would go about doing it.
> 
> I *may* have destroyed part of the array by
> reinstalling the OS on /dev/hda...although I'm not
> sure how it was set up in the first place.
> 
> If this is the case though, is the data that was on
> the other physical volumes still actually accessible
> in some way?  At this point I'm ready to start over,
> but not before I've exhausted all my options.

next question is what were the PVs

if the PVs were the whole drives hdb, hdd, hde, hdf and 
hdg (and possibly also all or some of hda), then quite 
a lot of metadata should be available there.

pvscan might help you here ?

IIRC, if you have some PVs, then you should have a copy 
of the table in those that will tell you what PVs there
were in the VG.

supposing you have say 5 PVs out of 6 intact then there
is a next step, but I'm not sure what it is off the top
of my head.  I expect it will have been discussed before
on this list, so take a look at the archives.

Regards,
Paddy
-- 
Perl 6 will give you the big knob. -- Larry Wall