How to config HP-UX11.23 to use two HBA for failover

[Joseph Luk]

Hi all,
I have to config a HPUX 11.23 (EOE) with 2 HBA work as failover access to the HDS 9500 SAN.

But I have not much idea how to config it, after IOSCAN I got disk from each of SAN and shown as difference disk?

Can any one give me a starting point to config it.

[Slawomir Gora · Accepted solution]

Hi,

if you use LVM you can configure alternative paths to disk in vg group. It is very simple.
Just add to vg group all disks which corespond to LUN you want to configure.
If you have configured vg group you have to
run vgextend command to add rest od disks.
(Currently LVM supports a maximum of 8 paths to a physical volume)

ex: one LUN is visible as:
c10t0d1 - on controler 1
c12t0d1 - on controler 2

pvcreate /dev/rdsk/c10t0d1
mkdir /dev/vgtest
mknod /dev/vgtest/group c 64 0x080000
vgcreate /dev/vgtest /dev/dsk/c10t0d1
vgextend /dev/vgtest /dev/dsk/c12t0d1


in vg status you will have:

vgdisplay -v vgtest
..
--- Physical volumes ---
PV Name /dev/dsk/c10t0d1
PV Name /dev/dsk/c12t0d1 Alternate Link
PV Status available
Total PE 7998
Free PE 0
Autoswitch On


..

[Nguyen Anh Tien]

Hi Joseph
Fist solution. I agree with Slawomir Gora using Alternate Link as redundancy path. you can follow Slawomir Gora example.
Second solution: (for VA, EVA) you buy secure path, install and config.

[Joseph Luk]

Hi Slawomir and Nguyen,

Thanks for your help , I did follow Slawomir way to config it, it work. As we didn't have a big budget to get secure path, Anyway I will remember that in the next time to setup new system.

Regards,
Joseph