Re: [Xen-users] Storage recovery question / recommendations

["mitch@xxxxxxxxxxxx" <mitch@xxxxxxxxxxxx>]

Hi Errol - thanks for the reply - more below...

-----Original Message-----
From: Errol Neal [mailto:eneal@xxxxxxxxxxxxxxxxx] 
Sent: April 15, 2013 6:22 PM
To: Mitch (Bitblock)
Cc: 'Xen-users@xxxxxxxxxxxxx'
Subject: Re: [Xen-users] Storage recovery question / recommendations

On Mon, 04/15/2013 06:08 PM, "mitch@xxxxxxxxxxxx" <mitch@xxxxxxxxxxxx> wrote:
> Specifically I only REALLY need a single virtual hard drive - Ideally the 
> whole vm would be nice - which was created late in the host server's lifetime 
> (so theoretically further into the disk).
> 
> Failing that, whatever FILES from that vhd that could be pulled would be 
> great.
> 
> The reinit was fast - so it obviously didn't WIPE the disk.
> 
You are correct. The reinit would have wiped the previous LVM structure and 
created a new one.
Check /etc/lvm/archive or /etc/lvm/backup for a backup vg config. You can then 
use vgcfgrestore to restore the previous configuration onto the SR. 

[Mitch says:] The problem is that the system was reinstalled - so would these 
contents really be valid?
Right now in /etc/lvm/backup I see:
VG_XenStorage-1250f2e7-128e-7aff-f0fe-ca03bae1eb56
VG_XenStorage-63aedcf6-e60a-4bc0-935a-7b393a0b3b33
VG_XenStorage-6fb39163-2cb1-9464-5d19-5dc2e951e38a
VG_XenStorage-84bae666-255d-196a-54aa-73afc5047d70
How would I tell which is which?

Please note, the Type as viewed under storage for this SR was "Hardware HBA" - 
not LVM - does that matter?

I'll read up on vgcfgrestore

Any further pointers appreciated. Thanks!

> 
> 1)     Any information on underlying file system / advice on recovery methods 
> etc.
> 
> 2)     Any recommendations on consultants or firms who have fixed this sort 
> of error for you?
> 
> 3)     Any advice for the future on a way to remount an HBA device after an 
> upgrade or an LVM if that's preferred (and why does it default to HBA if LVM 
> is better?) I've been reading but probably reading the wrong stuff as I don't 
> see a clear answer yet...

HBAoLVM is the default SR type for anything attached via FC through XenCenter. 
[Mitch says:] These aren't on FC - it was just an SAS Raid1 SR - so it was set 
up as "Hardware HBA".


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