[linux-lvm] LVM with Powerpath - incompatibility

[linux-lvm] LVM with Powerpath - incompatibility

[Hantzley Tauckoor]

Hi,

I have a CX300 Clariion and a x445 IBM (4 processors and 4GB RAM) server 
equipped with 2 Emulex FibreChannel cards which are directly connected 
to the cx300's controllers.

My software config is as follows:

Redhat ES 3.0 with Kernel 2.4.21-20.ELsmp
PowerPath 4.3.1
LPFC 2.4 driver kit 7.2.4-1
lvm-1.0.3-15


I created 2LUNs on the cx300, and therefore I can see 4 sd devices on 
linux (2 on one path and 2 on the other). After installing PowerPath, I 
am able to access the LUNs via /dev/emcpowera1 and /dev/emcpowerb1 
respectively.

But I cannot use LVM on these devices directly. However LVM works with 
/dev/sd* devices. I wish to use it with the PowerPath devices instead, 
so as to have dynamic multipathing.

I also tried to install Veritas Volume Manager; no luck, the eval 
version was compiled for kernel.2.4.xx-Hugemem - which is not my present 
kernel. I have incompatibility problems because PowerPath 4.3.1 requires 
at kernel 2.4.21-15 or 2.4.21-20.

Is there someone who had the same type of problem? Any tip on how to 
make LVM run with PowerPath devices?

Thank you in advance for your replies.

Rgds,

Hantzley Tauckoor
----------------------------------------------------
Project Manager
Telecom Plus Ltd
www.telecomplus.net
----------------------------------------------------

Re: [linux-lvm] LVM with Powerpath - incompatibility

[Luca Berra]

On Fri, May 27, 2005 at 11:11:40AM +0400, Hantzley Tauckoor wrote:
>Is there someone who had the same type of problem? Any tip on how to 
>make LVM run with PowerPath devices?
>
https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=124647
which is the first hit on google with keywords "lvm powerpath redhat
3.0"

-- 
Luca Berra -- bluca@comedia.it
        Communication Media & Services S.r.l.
 /"\
 \ /     ASCII RIBBON CAMPAIGN
  X        AGAINST HTML MAIL
 / \

Re: [linux-lvm] LVM with Powerpath - incompatibility

[Chris Osicki]

Hi Hantzley

You should read PowerPath Release Notes (P/N 300-001-969) or at least it's page 15 ;-)
"EMC pseudeo devices are not supported with LVM. Instead, native SCSI devices must be used..."

I think EMC messed up with device names as seeen in /proc/devices under "Block devices" and
LVM doesn't recognize them. They used to be called emcpower in older versions of PP I think,
now they are "emcp".

Regards,
Chris


On Fri, 27 May 2005 11:11:40 +0400
Hantzley Tauckoor <hantzley@telecomplus.net> wrote:

> Hi,
> 
> I have a CX300 Clariion and a x445 IBM (4 processors and 4GB RAM) server 
> equipped with 2 Emulex FibreChannel cards which are directly connected 
> to the cx300's controllers.
> 
> My software config is as follows:
> 
> Redhat ES 3.0 with Kernel 2.4.21-20.ELsmp
> PowerPath 4.3.1
> LPFC 2.4 driver kit 7.2.4-1
> lvm-1.0.3-15
> 
> 
> I created 2LUNs on the cx300, and therefore I can see 4 sd devices on 
> linux (2 on one path and 2 on the other). After installing PowerPath, I 
> am able to access the LUNs via /dev/emcpowera1 and /dev/emcpowerb1 
> respectively.
> 
> But I cannot use LVM on these devices directly. However LVM works with 
> /dev/sd* devices. I wish to use it with the PowerPath devices instead, 
> so as to have dynamic multipathing.
> 
> I also tried to install Veritas Volume Manager; no luck, the eval 
> version was compiled for kernel.2.4.xx-Hugemem - which is not my present 
> kernel. I have incompatibility problems because PowerPath 4.3.1 requires 
> at kernel 2.4.21-15 or 2.4.21-20.
> 
> Is there someone who had the same type of problem? Any tip on how to 
> make LVM run with PowerPath devices?
> 
> Thank you in advance for your replies.
> 
> Rgds,
> 
> Hantzley Tauckoor
> ----------------------------------------------------
> Project Manager
> Telecom Plus Ltd
> www.telecomplus.net
> ----------------------------------------------------
> 
> 
> _______________________________________________
> 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/
> 

Re: [linux-lvm] LVM with Powerpath - incompatibility

[Hantzley Tauckoor]

[-- Attachment #1: Type: text/plain, Size: 2436 bytes --]

Thanks mate.

I'll dig into the doc.

Rgds,

Hantzley


Chris Osicki wrote:

>Hi Hantzley
>
>You should read PowerPath Release Notes (P/N 300-001-969) or at least it's page 15 ;-)
>"EMC pseudeo devices are not supported with LVM. Instead, native SCSI devices must be used..."
>
>I think EMC messed up with device names as seeen in /proc/devices under "Block devices" and
>LVM doesn't recognize them. They used to be called emcpower in older versions of PP I think,
>now they are "emcp".
>
>Regards,
>Chris
>
>
>On Fri, 27 May 2005 11:11:40 +0400
>Hantzley Tauckoor <hantzley@telecomplus.net> wrote:
>
>  
>
>>Hi,
>>
>>I have a CX300 Clariion and a x445 IBM (4 processors and 4GB RAM) server 
>>equipped with 2 Emulex FibreChannel cards which are directly connected 
>>to the cx300's controllers.
>>
>>My software config is as follows:
>>
>>Redhat ES 3.0 with Kernel 2.4.21-20.ELsmp
>>PowerPath 4.3.1
>>LPFC 2.4 driver kit 7.2.4-1
>>lvm-1.0.3-15
>>
>>
>>I created 2LUNs on the cx300, and therefore I can see 4 sd devices on 
>>linux (2 on one path and 2 on the other). After installing PowerPath, I 
>>am able to access the LUNs via /dev/emcpowera1 and /dev/emcpowerb1 
>>respectively.
>>
>>But I cannot use LVM on these devices directly. However LVM works with 
>>/dev/sd* devices. I wish to use it with the PowerPath devices instead, 
>>so as to have dynamic multipathing.
>>
>>I also tried to install Veritas Volume Manager; no luck, the eval 
>>version was compiled for kernel.2.4.xx-Hugemem - which is not my present 
>>kernel. I have incompatibility problems because PowerPath 4.3.1 requires 
>>at kernel 2.4.21-15 or 2.4.21-20.
>>
>>Is there someone who had the same type of problem? Any tip on how to 
>>make LVM run with PowerPath devices?
>>
>>Thank you in advance for your replies.
>>
>>Rgds,
>>
>>Hantzley Tauckoor
>>----------------------------------------------------
>>Project Manager
>>Telecom Plus Ltd
>>www.telecomplus.net
>>----------------------------------------------------
>>
>>
>>_______________________________________________
>>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/
>>
>>    
>>
>
>_______________________________________________
>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/
>
>  
>


[-- Attachment #2: Type: text/html, Size: 3422 bytes --]