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



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
----------------------------------------------------


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