[gentoo-user] LVM - Removing a Bad Disk w/o a new disk

[gentoo-user] LVM - Removing a Bad Disk w/o a new disk

[Ow Mun Heng]

Current situation is that I have a bad disk /dev/sdb1 in an existing lvm
partition. (sda1/sda4/sdb1)

I would like to remove it from the VG.

I've already reduced the existing VG to the size of sda1+sda4
partition. 

I would like to remove entirely the Physical Extents from the volume
group. It doesn't seem like there's a way to do this w/o putting another
disk inside? 

I'm sure that's not true.


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Ow Mun Heng <Ow.Mun.Heng@wdc.com>

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Re: [gentoo-user] LVM - Removing a Bad Disk w/o a new disk

[Neil Bothwick]

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On Mon, 22 May 2006 00:33:47 -0700, Ow Mun Heng wrote:

> I would like to remove entirely the Physical Extents from the volume
> group. It doesn't seem like there's a way to do this w/o putting another
> disk inside? 

$ man vgreduce

DESCRIPTION
       vgreduce  allows  you to remove one or more unused physical volumes
       from a volume group.


-- 
Neil Bothwick

Top Oxymorons Number 5: Twelve-ounce pound cake

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Re: [gentoo-user] LVM - Removing a Bad Disk w/o a new disk

[Ow Mun Heng]

On Mon, 2006-05-22 at 10:00 +0100, Neil Bothwick wrote:
> On Mon, 22 May 2006 00:33:47 -0700, Ow Mun Heng wrote:
> 
> > I would like to remove entirely the Physical Extents from the volume
> > group. It doesn't seem like there's a way to do this w/o putting another
> > disk inside? 
> 
> $ man vgreduce
> 
> DESCRIPTION
>        vgreduce  allows  you to remove one or more unused physical volumes
>        from a volume group.
> 

Did try that.. it keeps complaining

vgreduce storage /dev/sdb1
  Physical volume "/dev/sdb1" still in use

I have no idea what/who is using it. fuser/lsof etc doesn't show up
anything
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Ow Mun Heng <Ow.Mun.Heng@wdc.com>

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Re: [gentoo-user] LVM - Removing a Bad Disk w/o a new disk

[Alexander Skwar]

Ow Mun Heng wrote:

> Did try that.. it keeps complaining
> 
> vgreduce storage /dev/sdb1
>   Physical volume "/dev/sdb1" still in use
> 
> I have no idea what/who is using it. fuser/lsof etc doesn't show up
> anything

This means, that there are still used Physical Extents (PEs) on
this PV. A PE is used, if it is "referenced" by a Logical Volume (LV).

So - you'll need to move all the LVs off of that PV. To do so, use
pvmove.

Alexander Skwar
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Re: [gentoo-user] LVM - Removing a Bad Disk w/o a new disk

[Ow Mun Heng]

On Mon, 2006-05-22 at 16:28 +0200, Alexander Skwar wrote:
> Ow Mun Heng wrote:
> 
> > Did try that.. it keeps complaining
> > 
> > vgreduce storage /dev/sdb1
> >   Physical volume "/dev/sdb1" still in use
> > 
> > I have no idea what/who is using it. fuser/lsof etc doesn't show up
> > anything
> 
> This means, that there are still used Physical Extents (PEs) on
> this PV. A PE is used, if it is "referenced" by a Logical Volume (LV).
> 
> So - you'll need to move all the LVs off of that PV. To do so, use
> pvmove.

I've just created a test scenerio using a test box (under vmware) and
for some reason, this one can't get dm-mirror. 

Where can I get dm-mirror?

For the original box, as I mentioned, I don't have any free PE to move
the existing data to. As such, it won't let me pvmove anything.

(after some trouble, I managed to reduce/remove the physical disk - Thanks)

BTW, how do I remove _all_ physical volumes? eg: start out clean?

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Ow Mun Heng <Ow.Mun.Heng@wdc.com>

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Re: [gentoo-user] LVM - Removing a Bad Disk w/o a new disk

[Neil Bothwick]

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On Mon, 22 May 2006 11:27:38 -0700, Ow Mun Heng wrote:

> BTW, how do I remove _all_ physical volumes? eg: start out clean?

pvremove


-- 
Neil Bothwick

*Libra*: /(Sept 23--Oct 23)/ An unfortunate typo on your application
results in your being accepted into the Legion Of Superherpes.

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Re: [gentoo-user] LVM - Removing a Bad Disk w/o a new disk

[Alexander Skwar]

Ow Mun Heng wrote:
> On Mon, 2006-05-22 at 16:28 +0200, Alexander Skwar wrote:
>> Ow Mun Heng wrote:
>> 
>> > Did try that.. it keeps complaining
>> > 
>> > vgreduce storage /dev/sdb1
>> >   Physical volume "/dev/sdb1" still in use
>> > 
>> > I have no idea what/who is using it. fuser/lsof etc doesn't show up
>> > anything
>> 
>> This means, that there are still used Physical Extents (PEs) on
>> this PV. A PE is used, if it is "referenced" by a Logical Volume (LV).
>> 
>> So - you'll need to move all the LVs off of that PV. To do so, use
>> pvmove.
> 
> I've just created a test scenerio using a test box (under vmware) and
> for some reason, this one can't get dm-mirror. 
> 
> Where can I get dm-mirror?

You'll need a kernel compiled with support for mirror and lvm2
mustn't be compiled with nomirror USE flag.


Alexander Skwar
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