[linux-lvm] LVM with Powerpath - incompatibility
Chris Osicki
osk at admin.swisscom-mobile.ch
Mon May 30 07:52:53 UTC 2005
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 at 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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