11iv3 - Adding alternate links to existing volumegroup (using legacy dsfs)

[Tom Haddad]

I have a volumegroup to where I want to add th legacy alternae links to it.

i  used....

vgextend /dev/vgxx  /dev/cyt1d0      (primary is cxt1d0)

If fails saying

verfication of unique LVM disk id on each disk in the volume group /dev/vgxx failed.

Following are the sets of disks having identical LVM disk id

/dev/dsk/cxt1do  /dev/dsk/cyt1d0

[Robert_Jewell]

I assume you set originally set up the VG up using legacy dsf's?

You can check the following to see if legacy multipathing is enabled (by default it is).

# scsimgr get_attr -a leg_mpath_enable

Also, perhaps you can post vgdisplay -v and ioscan -fnk

-Bob

[Hein van den Heuvel]

>>> If fails saying  ...   /dev/dsk/cxt1do  /dev/dsk/cyt1d0

Did it really say that? That looks like an oooh, not a zero.

fwiw,

Hein

[Tom Haddad]

leg_mpath_enable says... current=true and default=true

Attached is the vgdisplay

[Tom Haddad]

My reply didnt have attachment..so I imbedded the vgdisplay

--- Volume groups ---

VG Name /dev/vgdwh

VG Write Access read/write

VG Status available, exclusive

Max LV 255

Cur LV 7

Open LV 7

Max PV 60

Cur PV 37

Act PV 37

Max PE per PV 1078

VGDA 74

PE Size (Mbytes) 8

Total PE 39886

Alloc PE 38808

Free PE 1078

Total PVG 0

Total Spare PVs 0

Total Spare PVs in use 0

VG Version 1.0

VG Max Size 517440m

VG Max Extents 64680

--- Logical volumes ---

LV Name /dev/vgdwh/lvora

LV Status available/syncd

LV Size (Mbytes) 34496

Current LE 4312

Allocated PE 4312

Used PV 4

LV Name /dev/vgdwh/lvundo

LV Status available/syncd

LV Size (Mbytes) 198352

Current LE 24794

Allocated PE 24794

Used PV 23

LV Name /dev/vgdwh/lvapps

LV Status available/syncd

LV Size (Mbytes) 12936

Current LE 1617

Allocated PE 1617

Used PV 2

LV Name /dev/vgdwh/lvhome

LV Status available/syncd

LV Size (Mbytes) 4312

Current LE 539

Allocated PE 539

Used PV 1

LV Name /dev/vgdwh/lvoratmp

LV Status available/syncd

LV Size (Mbytes) 25872

Current LE 3234

Allocated PE 3234

Used PV 3

LV Name /dev/vgdwh/lvorasys

LV Status available/syncd

LV Size (Mbytes) 17248

Current LE 2156

Allocated PE 2156

Used PV 2

LV Name /dev/vgdwh/lvu01

LV Status available/syncd

LV Size (Mbytes) 17248

Current LE 2156

Allocated PE 2156

Used PV 2

--- Physical volumes ---

PV Name /dev/dsk/c8t2d7

PV Status available

Total PE 1078

Free PE 0

Autoswitch On

Proactive Polling On

PV Name /dev/dsk/c8t3d0

PV Status available

Total PE 1078

Free PE 0

Autoswitch On

Proactive Polling On

PV Name /dev/dsk/c8t3d1

PV Status available

Total PE 1078

Free PE 0

Autoswitch On

Proactive Polling On

PV Name /dev/dsk/c8t3d2

PV Status available

Total PE 1078

Free PE 0

Autoswitch On

Proactive Polling On

PV Name /dev/dsk/c8t3d3

PV Status available

Total PE 1078

Free PE 0

Autoswitch On

Proactive Polling On

PV Name /dev/dsk/c8t3d4

PV Status available

Total PE 1078

Free PE 0

Autoswitch On

Proactive Polling On

PV Name /dev/dsk/c8t3d5

PV Status available

Total PE 1078

Free PE 0

Autoswitch On

Proactive Polling On

PV Name /dev/dsk/c8t3d6

PV Status available

Total PE 1078

Free PE 0

Autoswitch On

Proactive Polling On

PV Name /dev/dsk/c8t3d7

PV Status available

Total PE 1078

Free PE 0

Autoswitch On

Proactive Polling On

PV Name /dev/dsk/c8t4d0

PV Status available

Total PE 1078

Free PE 0

Autoswitch On

Proactive Polling On

PV Name /dev/dsk/c8t4d1

PV Status available

Total PE 1078

Free PE 0

Autoswitch On

Proactive Polling On

PV Name /dev/dsk/c8t4d2

PV Status available

Total PE 1078

Free PE 0

Autoswitch On

Proactive Polling On

PV Name /dev/dsk/c8t4d3

PV Status available

Total PE 1078

Free PE 0

Autoswitch On

Proactive Polling On

PV Name /dev/dsk/c8t11d3

PV Status available

Total PE 1078

Free PE 0

Autoswitch On

Proactive Polling On

PV Name /dev/dsk/c8t11d4

PV Status available

Total PE 1078

Free PE 0

Autoswitch On

Proactive Polling On

PV Name /dev/dsk/c8t11d5

PV Status available

Total PE 1078

Free PE 0

Autoswitch On

Proactive Polling On

PV Name /dev/dsk/c8t11d6

PV Status available

Total PE 1078

Free PE 0

Autoswitch On

Proactive Polling On

PV Name /dev/dsk/c8t11d7

PV Status available

Total PE 1078

Free PE 0

Autoswitch On

Proactive Polling On

PV Name /dev/dsk/c8t12d0

PV Status available

Total PE 1078

Free PE 0

Autoswitch On

Proactive Polling On

PV Name /dev/dsk/c8t12d1

PV Status available

Total PE 1078

Free PE 0

Autoswitch On

Proactive Polling On

PV Name /dev/dsk/c8t12d2

PV Status available

Total PE 1078

Free PE 0

Autoswitch On

Proactive Polling On

PV Name /dev/dsk/c8t13d3

PV Status available

Total PE 1078

Free PE 0

Autoswitch On

Proactive Polling On

PV Name /dev/dsk/c8t13d4

PV Status available

Total PE 1078

Free PE 0

Autoswitch On

Proactive Polling On

PV Name /dev/dsk/c8t13d5

PV Status available

Total PE 1078

Free PE 0

Autoswitch On

Proactive Polling On

PV Name /dev/dsk/c8t13d6

PV Status available

Total PE 1078

Free PE 0

Autoswitch On

Proactive Polling On

PV Name /dev/dsk/c8t13d7

PV Status available

Total PE 1078

Free PE 0

Autoswitch On

Proactive Polling On

PV Name /dev/dsk/c8t14d0

PV Status available

Total PE 1078

Free PE 0

Autoswitch On

Proactive Polling On

PV Name /dev/dsk/c8t14d1

PV Status available

Total PE 1078

Free PE 0

Autoswitch On

Proactive Polling On

PV Name /dev/dsk/c8t14d2

PV Status available

Total PE 1078

Free PE 0

Autoswitch On

Proactive Polling On

PV Name /dev/dsk/c8t14d3

PV Status available

Total PE 1078

Free PE 0

Autoswitch On

Proactive Polling On

PV Name /dev/dsk/c8t14d4

PV Status available

Total PE 1078

Free PE 0

Autoswitch On

Proactive Polling On

PV Name /dev/dsk/c8t14d5

PV Status available

Total PE 1078

Free PE 0

Autoswitch On

Proactive Polling On

PV Name /dev/dsk/c8t14d6

PV Status available

Total PE 1078

Free PE 0

Autoswitch On

Proactive Polling On

PV Name /dev/dsk/c8t14d7

PV Status available

Total PE 1078

Free PE 0

Autoswitch On

Proactive Polling On

PV Name /dev/dsk/c8t15d0

PV Status available

Total PE 1078

Free PE 0

Autoswitch On

Proactive Polling On

PV Name /dev/dsk/c8t15d1

PV Status available

Total PE 1078

Free PE 0

Autoswitch On

Proactive Polling On

PV Name /dev/dsk/c8t15d2

PV Status available

Total PE 1078

Free PE 1078

Autoswitch On

Proactive Polling On

[Robert_Jewell]

Try running # vgchange -a y /dev/vgxx and see if you get an errors with any existing volumes.

You can use # ioscan -m dsf to confirm that the legacy paths refer to the same device.  For example:

/dev/rdisk/disk17        /dev/rdsk/c11t0d0
                                   /dev/rdsk/c9t0d0
/dev/rdisk/disk18        /dev/rdsk/c11t0d1
                                   /dev/rdsk/c9t0d1
/dev/rdisk/disk19        /dev/rdsk/c11t0d2
                                   /dev/rdsk/c9t0d2

Also by doing a bit of searching myself I noted a few comments regarding EMC LUN behavior for HP-UX 11.31. Here is a good example if this applies:

http://h30499.www3.hp.com/t5/LVM-and-VxVM/Can-t-add-alternate-path-to-VG-on-11-31/m-p/5192457/highlight/true#M47369

-Bob

[Tom Haddad]

heres somes info..

I ran    ioscan -m dsf on one of my 11iv3 servers. Heres a sample of it output

/dev/rdisk/disk100            /dev/rdsk/c8t5d0

                                             /dev/rdsk/c10t5d0

(notice the 2 legacy devices to the 1 agile)

This server has legacy alternate links when I view any VG on it.. (this was our first 11iv3 server)

On the server im are having an issue with..here is a sample of its ioscan -m dsf

/dev/rdisk/disk200            /dev/rdsk/c8t1d0

/dev/rdisk/disk230            /dev/rdisk/c10t1d0

Knowing that the 2 legacies above point to the same disk (EMC syminq)

Why is a new agile assigned to   the the second  (alternate) legacy?

[Robert_Jewell · Accepted solution]

If you havent, refer to the link I posted above.  This seems to be quite related.  

A copy of the post that resolved the issue on that post:

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Go speak to youe EMC support guys and ask them if they have the SPC-3 bit set on the FA ports on the Symmetrix that talk to the 11iv3 host.

IIRC if the SPC-3 bit isn't set, then an EMC SYmmetrix will generate a different WWID for each path to the same LUN, which causes HP-UX11iv3 to see each path as a different device.

This is *different* from the FA settings for 11iv2/11iv1, so your storage guys might not have realised.

HTH

Duncan

---------------------------------------------------------------------------------------

Rgs,
Bob

[Tom Haddad]

Thanks for the help. I contacted EMC and they stated the same. Its the SPC-2 bit to support 11iv3..