From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mx1.redhat.com (mx1.redhat.com [172.16.48.31]) by int-mx1.corp.redhat.com (8.11.6/8.11.6) with ESMTP id j4U86AO28241 for ; Mon, 30 May 2005 04:06:10 -0400 Received: from mauritiustelecom.com (mail.mauritiustelecom.com [202.123.2.83]) by mx1.redhat.com (8.12.11/8.12.11) with ESMTP id j4U8668J010955 for ; Mon, 30 May 2005 04:06:08 -0400 Received: from [202.123.1.2] (account hantzley.tauckoor@telecomplus.net HELO [127.0.0.1]) by mauritiustelecom.com (CommuniGate Pro SMTP 4.2) with ESMTP id 2817343 for linux-lvm@redhat.com; Mon, 30 May 2005 12:07:51 +0400 Message-ID: <429AC95E.2030200@telecomplus.net> Date: Mon, 30 May 2005 12:05:50 +0400 From: Hantzley Tauckoor MIME-Version: 1.0 Subject: Re: [linux-lvm] LVM with Powerpath - incompatibility References: <4296C82C.6090502@telecomplus.net> <20050530095253.24aa8e53@mwdsp001> In-Reply-To: <20050530095253.24aa8e53@mwdsp001> Content-Type: multipart/alternative; boundary="------------040200000509010801080803" Reply-To: LVM general discussion and development List-Id: LVM general discussion and development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , List-Id: To: LVM general discussion and development This is a multi-part message in MIME format. --------------040200000509010801080803 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit 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 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/ > > > --------------040200000509010801080803 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit 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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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/

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