topic Re: Lun in Operating System - HP-UX

Lun

A.G.M. Velthof — Thu, 22 Jul 2010 07:29:30 GMT

Hello to all.

I've a MCSG cluster of 4 nodes. When I create luns on our EVA6000 en present them to the 4 nodes, I can see the /dev/disk/diskxx on 3 nodes.
On one node the disk does not show until I do an ioscan.
It happens with every new lun I make.

Anyone any idea?

Re: Lun

Matti_Kurkela — Thu, 22 Jul 2010 07:49:45 GMT

Are all the nodes using the same OS version and patched to the same level?

Also check the host type parameters on your EVA6000.

In EMC Symmetrix storage systems, the feature that allows HP-UX (11.31 only) to auto-detect new LUNs is called the "os07 director flag"; I don't know what is its name in the EVA storage systems.

MK

Re: Lun

A.G.M. Velthof — Thu, 22 Jul 2010 07:58:11 GMT

Hello Matti,

thank You for the fast response.

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Yes, exactly the same.

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On the EVA I don't see such a parameter.
I don't think it is the EVA, because we make mirror luns on another EVA and there it is the same behaviour.

Re: Lun

Jeeshan — Thu, 22 Jul 2010 08:42:56 GMT

check the zoning .

Re: Lun

A.G.M. Velthof — Thu, 22 Jul 2010 08:59:15 GMT

Already checked, nothing wrong or different from the others.....

Re: Lun

Benoy Daniel — Fri, 23 Jul 2010 00:04:01 GMT

Once you add the disk, you need to create the device file for new luns added.

Re: Lun

Abid Iqbal — Fri, 23 Jul 2010 04:56:06 GMT

Hi,
Please check that the FC firmware version and driver version on all node must be same.

Re: Lun

A.G.M. Velthof — Fri, 23 Jul 2010 10:33:07 GMT

The firmware is the same everywhere.
The agile devicefiles (/dev/disk/diskxxx) don't need to be created manual, the are created automaticly

Re: Lun

stephen peng — Sun, 25 Jul 2010 06:45:52 GMT

you see /dev/disk/diskxx on 3nodes by what means?ls? not that familiar with 11.31, but i am confused ioscan doesn't need to be executed to find out new dsfs even they are agile.

Re: Lun

A.G.M. Velthof — Mon, 26 Jul 2010 12:01:46 GMT

That is correct.
The device files show automaticly.

Just not on that one node