Hi guys,

question1,
I got 2 VIO servers, each with a fc adapter and presented lun from EMC
to this 2 VIO servers and i'm not using powerpath. In VIO1, i see
hdisk2 and hdisk3, i linked hdisk2 to vhost0.
In VIO2, i also see hdisk2 and hdisk3, i try to link hdisk3 to vhost0
but encountered error.
Is it because i'm using powerpath and that's the reson why i
encountered error linking vhost0 in VIO2?

question2,
If i can successful link hdisk2 to VIO1 vhost0 and hdisk3 to VIO2
vhost0, on my client lpar i will see two PV hdisk0 (vscsi0) and
hdisk1(vscsi1), how do i configure MPIO so that i will only use hdisk0
(vscsi0) path first and if VIO1 go down, it will automatically use
hdisk1 (vscsi1) path?

thank you

set
reserve_lock=no for your disks on both VIOS before mapping them to
vSCSI adapters...
see emc primus 75601 for more details

Before you map the hdisk to a vhost, you must change attributes of the
hdisks.
Do a "lsattr -El hdisk2" and check the "reserve_policy" attribute. It
must be "no_reserve" (on both vios), otherwise you can only map it on
the first vio. (chdev -l hdisk2 -a reserve_policy=no_reserve). (You
will have to remove the old mappingdevice for the hdisk<->vhost before
you apply the change, otherwise it will say something like "resource
busy")

//Fredrik B