Hi!
are there any of You that have sperimented the installation of the new
powerpath 4.4.2 eFix 1 in a vIOS lpar ?

---- cite -----------
218290 PowerPath has added support for the Unique Device Identifier
(UDID)
feature for VIO. UDID is the preferred disk identification
method
for Virtual I/O Server (VIOS) disks. Other methods for
identifying
VIOS disks include IEEE Volume Identifier and Physical Volume

Identifier (PVID). Each method may result in a different
format on
disk. The UDID method is already in use as an identifier for
MPIO
devices. It has now been expanded to include support for VIO
devices
-----------------------

In this case what king of issue have you encontered?

Many Thank's

Valerio

pvb265 wrote:
> Hi!
> are there any of You that have sperimented the installation of the new
> powerpath 4.4.2 eFix 1 in a vIOS lpar ?
>
> ---- cite -----------
> 218290 PowerPath has added support for the Unique Device Identifier
> (UDID)
> feature for VIO. UDID is the preferred disk identification
> method
> for Virtual I/O Server (VIOS) disks. Other methods for
> identifying
> VIOS disks include IEEE Volume Identifier and Physical Volume
>
> Identifier (PVID). Each method may result in a different
> format on
> disk. The UDID method is already in use as an identifier for
> MPIO
> devices. It has now been expanded to include support for VIO
> devices
> -----------------------
>
> In this case what king of issue have you encontered?
>
> Many Thank's
>
> Valerio
Hi Valerio,

the fact, that PowerPath has added support for the Unique Device
Identifiers means, that you must perform a PowerPath (PVID) to
PowerPath (UDID) Device Migration for your pre-GA configuration :-(

Please refer to the EMC Virtual I/O Server Technical Notes. You will
find this guide at https://powerlink.emc.com > Support > Document
Library > Host Connectivity > Technical Notes/Troubleshooting.

There you will find a detailed description how to migrate from
identifing disks using PVIDs to UDIDs.

I hope, to read this guide will prevent you to see one of the possible
issues, (including data unavailable). The command "recreatevg" should
help you to recover lost volumegroups, caused by changed PVIDs!

Before you update EMC PowerPath, refer to the EMC Open System Support
Matrix and the EMC PowerPath for AIX Release Notes, too - YOU NEED TO
READ THE FOOTNOTES !

Note, that EMC PowerPath 4.5.1 for AIX is available, too.


Best regards,

Swen