topic Re: 3 PV presented to 3 Serveres in Operating System - HP-UX

3 PV presented to 3 Serveres

Aungshuman Paul — Thu, 18 Feb 2010 05:47:21 GMT

Hi,

Can anyone help for following issue :

3 LUN presented to 3 Serveres ( HPUX 11i v2).All the system see all 3 LUN ( Because there is no SAN Zoning). Now how can I identify which PV is free and which PV is already used by another system? My storage is MSA 1000

Aungshu

Re: 3 PV presented to 3 Serveres

Kapil Jha — Thu, 18 Feb 2010 06:13:17 GMT

why all servers are seeing all 3, they should not unless is cluster.

Well you can use pvdisplay command it would show what VG it belong to.

if these are new LUNs they would not be having anything.

BR,
Kapil+

Re: 3 PV presented to 3 Serveres

Torsten. — Thu, 18 Feb 2010 07:16:00 GMT

Enable and configure SSP to prevent this!

Each server can only see its own LUN then.

Re: 3 PV presented to 3 Serveres

Aungshuman Paul — Thu, 18 Feb 2010 07:39:58 GMT

PVDISPLAY command output shows it is unused but real scenario the LUN already used in another server. So my question how can I identify which is really free which is not?

Re: 3 PV presented to 3 Serveres

Torsten. — Thu, 18 Feb 2010 07:45:58 GMT

Connect to each server and note down what server is using which lun. Then setup SSP!

Re: 3 PV presented to 3 Serveres

Aungshuman Paul — Thu, 18 Feb 2010 07:47:31 GMT

can you tell me , how to identyfy the lun?

Re: 3 PV presented to 3 Serveres

Torsten. — Thu, 18 Feb 2010 07:57:23 GMT

Please send "ioscan -fnCdisk" and "vgdisplay -v".

Re: 3 PV presented to 3 Serveres

Kapil Jha — Thu, 18 Feb 2010 08:03:52 GMT

Is it PA or Itanium?
Are you sure you running pvdisply good, becuase it just read the disk data structure and nothing else it should show.

Torston,your views.

BR,
Kapil+

Re: 3 PV presented to 3 Serveres

Aungshuman Paul — Thu, 18 Feb 2010 08:43:09 GMT

Its a Itanium System. And I am now identify the LUN from ioscan -fnC disk o/p, which is shows HW path.

Thanks

Re: 3 PV presented to 3 Serveres

HCL Ash — Thu, 18 Feb 2010 09:05:55 GMT

Say you have one disk called c1t1d1

Then to check the disk is having dta or not

1) greate one group file for volume group
2) import the disk with volume group name

vgimport vgname c1t1di

3) activate volume group

4) Vgdiplsay -v newly created vg name will shoow if that disk is having any data or not