PowerPath on AIX

Will it cause a problem if the CLArrayS3 software is not removed?

Hi BigBird

PowerPath no longer requires CLArrayS3 fileset, It can be removed.

Conor

No it won't cause any issues to leave it, just ensure that from the output of lsdev -Cc disk that the CLARiiON devices show up as:

hdisk11 Available 06-08-02 EMC CLARiiON FCP RAID

and not as

hdisk11 Available 11-08-01 FC CLArray RAID 5 Disk Group

In the first example the device is defined with EMC ODM pacakage, in the second the CLArray fileset provides the device definition.

So I should remove the CLArrayS3 software if the lsdev shows up like this?

hdisk2 Available 1n-08-01 FC CLArray RAID 5 Disk Group
hdisk3 Available 1n-08-01 FC CLArray RAID 1/0 Disk Group
hdisk4 Available 14-08-01 FC CLArray RAID 5 Disk Group
hdisk5 Available 14-08-01 FC CLArray RAID 1/0 Disk Group
hdiskpower0 Available 14-08-01 PowerPath Device
hdiskpower1 Available 14-08-01 PowerPath Device

Yes - currently the devices are defined by the CLArrayS3 fileset and not the ODM fileset (EMC.CLARiiON.aix.rte 5.3.0.3). To change this we will remove the CLArrayS3 fileset (Offline change) and redefine the devices using ODM 5.3.0.3

You must remove devices and the old version of CLArray by following these steps:

1. Unmount any file systems that have LUNs that belong to the CLARiiON array.
2. Run varyoff for any volume groups that have CLARiiON LUNs in use.
3. Remove all hdiskpowers and hdisks (rmdev -dl).
4. Remove all SP devices (sp0,1,2,3) (rmdev -l -d).
5. Remove all HBA driver and Fiber adapter instances:
rmdev -Rdl fcsiX ---> X being all instances of the driver i.e. 0,1,2, etc.
rmdev -Rdl fcsX ---> X being all instances of the cards i.e. 0,1,2, etc.
6. Remove the old version of CLArray from SMIT or command line.

We already have the base EMC ODM installed but we will also need one additional fileset to support PowerPath.
EMC.CLARiiON.fcp.rte
You can download the complete EMC ODM fileset from
ftp://ftp.emc.com/pub/elab/aix/ODM_DEFINITIONS/
Copy the EMC.AIX.5.3.0.3 file into the "/usr/sys/inst.images" directory.

Invoke smit installp.

Select option:
Install and Update from LATEST Available Software

Use List function to select the "/usr/sys/inst.images" as Installation directory.

Use List function to select one or more of the following:

EMC CLARiiON FCP Support Software; IBM Fibre Channel driver support. (Supports PowerPath)
EMC CLARiiON AIX Support Software; Standard utility support
EMC CLARiiON FCP MPIO Support Software; IBM default PCM MPIO support.
EMC CLARiiON AIX Support Software; Standard utility support

and only these definitions- are required.

EMC CLARiiON FCP Support Software; IBM Fibre Channel driver support.(Supports PowerPath)


7. Run cfgmgr, emc_cfgmgr, powermt config, powermt save
8. varyon all volume groups and mount the file systems

Let us know how this goes...

I was finally able to get the CLArrayS3 software removed but now I am not able to get the powerpath devices to come back in.
hdisk2 Available 14-08-02 EMC CLARiiON FCP RAID 5 Disk
hdisk3 Available 14-08-02 EMC CLARiiON FCP RAID 1/0 Disk
hdisk4 Available 1n-08-02 EMC CLARiiON FCP RAID 5 Disk
hdisk5 Available 1n-08-02 EMC CLARiiON FCP RAID 1/0 Disk
hdiskpower0 Available 14-08-02 PowerPath Device
hdiskpower1 Available 14-08-02 PowerPath Device

hdisk2 none None
hdisk3 none None
hdisk4 none None
hdisk5 none None
hdiskpower0 none None
hdiskpower1 none None

154 /tmp/emc > importvg -y data1vg hdiskpower1
0516-024 lqueryvg: Unable to open physical volume.
Either PV was not configured or could not be opened. Run
diagnostics.
0516-024 lqueryvg: Unable to open physical volume.
Either PV was not configured or could not be opened. Run
diagnostics.
0516-1140 importvg: Unable to read the volume group descriptor area
on specified physical volume.


What am I doing wrong?

I can't import the volume group on powerpath device.

I was finally able to get the CLArrayS3 software removed but now I am not able to get the powerpath devices to come back in.
hdisk2 Available 14-08-02 EMC CLARiiON FCP RAID 5 Disk
hdisk3 Available 14-08-02 EMC CLARiiON FCP RAID 1/0 Disk
hdisk4 Available 1n-08-02 EMC CLARiiON FCP RAID 5 Disk
hdisk5 Available 1n-08-02 EMC CLARiiON FCP RAID 1/0 Disk
hdiskpower0 Available 14-08-02 PowerPath Device
hdiskpower1 Available 14-08-02 PowerPath Device

hdisk2 none None
hdisk3 none None
hdisk4 none None
hdisk5 none None
hdiskpower0 none None
hdiskpower1 none None

154 /tmp/emc > importvg -y data1vg hdiskpower1
0516-024 lqueryvg: Unable to open physical volume.
Either PV was not configured or could not be opened. Run
diagnostics.
0516-024 lqueryvg: Unable to open physical volume.
Either PV was not configured or could not be opened. Run
diagnostics.
0516-1140 importvg: Unable to read the volume group descriptor area
on specified physical volume.


What am I doing wrong?

figured it out. thanks

We need to get the PVID's associated with hdiskpower devices before you can import the VG successfully. Have you tried an ODM cleanup? See EMC Knowledgebase solution emc93300.