topic Re: EVA 8100 controller port specification - HP-UX in Disk Enclosures

EVA 8100 controller port specification - HP-UX

Mark Read — Thu, 12 Mar 2009 04:03:21 GMT

How does one specify the port #1-4 on controller A or B of an HVA 8100?

All my disc i/o is passing through port #2 on each controller and hardly anything through ports 1,3,or 4.

HP-UX 11.23 Itanium, Cisco-MDS, EVA-8100

Re: EVA 8100 controller port specification - HP-UX

Torsten. — Thu, 12 Mar 2009 04:17:47 GMT

This depends on your volume manager settings.

I assume you are using PVLINKS for alternate pathes, not auto/secure path.

You should consider to "sort" the primary pathes to your physical volumes.

If you run

# vgdisplay -v ...
...
--- Physical volumes ---
PV Name /dev/dsk/c2t0d1s2
PV Name /dev/dsk/c12t0d1s2 Alternate Link
PV Name /dev/dsk/c4t0d1s2 Alternate Link
PV Name /dev/dsk/c10t0d1s2 Alternate Link
PV Status available
Total PE 2759
Free PE 13
Autoswitch On

PV Name /dev/dsk/c14t0d1s2
PV Name /dev/dsk/c8t0d1s2 Alternate Link
PV Name /dev/dsk/c16t0d1s2 Alternate Link
PV Name /dev/dsk/c6t0d1s2 Alternate Link
...

and you check the hardware path for all the disk devices, you will see how the OS is accessing the vdisks.

Using vgreduce / vgextend you can now sort these pathes.

Re: EVA 8100 controller port specification - HP-UX

Mark Read — Thu, 12 Mar 2009 04:31:02 GMT

Yes, we are using pvlinks and not any other pathing software. Thoseit seems that c36, c37, and c39 all use the same port on the EVA controller. I have only three paths at this time because that is what is currnetly zoned.

Here is a portion of what I see:
nodename # vgdisplay -v vg07
--- Volume groups ---
VG Name /dev/vg07
VG Write Access read/write
VG Status available
Max LV 255
Cur LV 3
Open LV 3
Max PV 16
Cur PV 2
Act PV 2
Max PE per PV 25599
VGDA 4
PE Size (Mbytes) 4
Total PE 31485
Alloc PE 30625
Free PE 860
Total PVG 0
Total Spare PVs 0
Total Spare PVs in use 0

--- Logical volumes ---
LV Name /dev/vg07/ocan
LV Status available/syncd
LV Size (Mbytes) 18000
Current LE 4500
Allocated PE 4500
Used PV 1

LV Name /dev/vg07/osys
LV Status available/syncd
LV Size (Mbytes) 27500
Current LE 6875
Allocated PE 6875
Used PV 2

LV Name /dev/vg07/otmg
LV Status available/syncd
LV Size (Mbytes) 77000
Current LE 19250
Allocated PE 19250
Used PV 2

--- Physical volumes ---
PV Name /dev/dsk/c36t0d1
PV Name /dev/dsk/c37t0d1 Alternate Link
PV Name /dev/dsk/c39t0d1 Alternate Link
PV Status available
Total PE 25599
Free PE 0
Autoswitch On

PV Name /dev/dsk/c36t0d2
PV Name /dev/dsk/c37t0d2 Alternate Link
PV Name /dev/dsk/c39t0d2 Alternate Link
PV Status available
Total PE 5886
Free PE 860
Autoswitch On

Re: EVA 8100 controller port specification - HP-UX

Torsten. — Thu, 12 Mar 2009 04:36:49 GMT

Can you please post an

# ioscan -fn

Re: EVA 8100 controller port specification - HP-UX

Mark Read — Thu, 12 Mar 2009 23:18:50 GMT

Attached is the 'ioscan -fn' results for the server in question.

Re: EVA 8100 controller port specification - HP-UX

Torsten. — Fri, 13 Mar 2009 05:45:19 GMT

This is what you have for your vg07 as primary pathes:

--- Physical volumes ---
PV Name /dev/dsk/c36t0d1
PV Name /dev/dsk/c37t0d1 Alternate Link
PV Name /dev/dsk/c39t0d1 Alternate Link

PV Name /dev/dsk/c36t0d2
PV Name /dev/dsk/c37t0d2 Alternate Link
PV Name /dev/dsk/c39t0d2 Alternate Link

this means

disk 228 1/0/10/1/0.78.0.8.0.0.1 sdisk CLAIMED DEVICE HP
HSV210
/dev/dsk/c36t0d1 /dev/rdsk/c36t0d1
disk 230 1/0/10/1/0.78.0.8.0.0.2 sdisk CLAIMED DEVICE HP
HSV210
/dev/dsk/c36t0d2 /dev/rdsk/c36t0d2

Same HBA, same EVA port.

Does other VGs are using c36t... devices too as primary?

As mentioned before, you should sort the paths and use

disk 256 0/0/10/1/0.108.0.0.0.0.1 sdisk CLAIMED DEVICE HP
HSV210
/dev/dsk/c39t0d1 /dev/rdsk/c39t0d1
disk 257 0/0/10/1/0.108.0.0.0.0.2 sdisk CLAIMED DEVICE HP
HSV210
/dev/dsk/c39t0d2 /dev/rdsk/c39t0d2

# vgreduce vg07 /dev/dsk/c36t0d1
# vgreduce vg07 /dev/dsk/c37t0d1

# vgextend vg07 /dev/dsk/c37t0d1
# vgextend vg07 /dev/dsk/c36t0d1

and you will get in vgdisplay

--- Physical volumes ---
PV Name /dev/dsk/c39t0d1
PV Name /dev/dsk/c37t0d1 Alternate Link
PV Name /dev/dsk/c36t0d1 Alternate Link