Re: [linux-lvm] Total free space using added VGs and LVs

From: David <dramdayal@gmail.com>
To: LVM general discussion and development <linux-lvm@redhat.com>
Subject: Re: [linux-lvm] Total free space using added VGs and LVs
Date: Wed, 21 Oct 2009 18:54:08 -0400	[thread overview]
Message-ID: <59ac317e0910211554p342c06b2p6d2a17e69fae7364@mail.gmail.com> (raw)
In-Reply-To: <a5a956f70910211203l62dc17e6nfa727804bdd1d1cb@mail.gmail.com>

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Is there anyway to recover a lost VolGroup if I have the UUID?

thanks,
David
On Wed, Oct 21, 2009 at 3:03 PM, Lou Arnold <larnolda1@gmail.com> wrote:

> I read the How-To. It doesn't talk about the specific case or being mounted
> at root, so I had to experiment. It is likely that commands were in the
> wrong order, but I don't know what the right order is.
>
> I have attached the terminal session I used. In the end it did not work.
> There was still 66 GB free, and when I rebooted, the file system failed. The
> superblock was too big.
>
> I obviously don't understand the difference between pvresize, lvreduce and
> vgreduce, and how  resize2fs  is related to these commands.
>
> Hope you can help,
> Lou.
>
>
> On 10/21/09, Drew <drew.kay@gmail.com> wrote:
>>
>> > The documentation wasn't specific. I believe the intent was simply to
>> > migrate the data to another logical volume to temporarily allow the
>> source
>> > volume to be reduced and/or removed. But let's assume that has happened
>> or
>> > that doesn't need to happen. So now we need to unmount LogVol00, reduce
>> it
>> > to its original nunber of extents and then remount it (either before or
>> > after remount we remove the physical drive.) I assume you can't try this
>> or
>> > you'll screw up your computer, but I have a system that I screw up and
>> > easily restore from a OS image. So no need to be too cautious.
>>
>> I've done this on several occasions.
>>
>> If you want to play with various scenarios in LVM, I'd recommend
>> reading the LVM How-To @ http://tldp.org/HOWTO/LVM-HOWTO/ . Sections
>> 11 & 13 cover the most common tasks you'll encounter in LVM. Play
>> around, don't be afraid to break things, and if you have questions
>> feel free to give the list a shout.
>>
>>
>> --
>> Drew
>>
>> "Nothing in life is to be feared. It is only to be understood."
>> --Marie Curie
>>
>
>
> _______________________________________________
> linux-lvm mailing list
> linux-lvm@redhat.com
> https://www.redhat.com/mailman/listinfo/linux-lvm
> read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/
>

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