HPE EVA Storage

EVA Preferred Path/Mode

 
psrconsulting
Occasional Contributor

EVA Preferred Path/Mode

Hi,

I have an EVA 6400 with multiple LUNs presented to a production ESX4 cluster. My question is this. If I change the preferred path/mode setting on the Vdisks from the default no preference to Failover/Failback will there be any interruption in I/O? i.e. will anyone important notice?

Cheers
Paul
5 REPLIES 5
Steven Clementi
Honored Contributor

Re: EVA Preferred Path/Mode

None at all... or at least there should not be.

Since the disk(s) are accessible across all 4 paths... there should not be any interruption at all.


Steven
Steven Clementi
HP Master ASE, Storage, Servers, and Clustering
MCSE (NT 4.0, W2K, W2K3)
VCP (ESX2, Vi3, vSphere4, vSphere5, vSphere 6.x)
RHCE
NPP3 (Nutanix Platform Professional)
Jan Soska
Honored Contributor

Re: EVA Preferred Path/Mode

no, it is safe....
and check HP EVA ESX 4x configuration guide for best result - set multipath to RR with IO count=1...

Jan
psrconsulting
Occasional Contributor

Re: EVA Preferred Path/Mode

Ok so this is weird. If I change the setting on any LUN they all change to match it i.e. I can't set each LUN individually.

Any ideas?
psrconsulting
Occasional Contributor

Re: EVA Preferred Path/Mode

Ah, this was because CA is running. Mystery over.
psrconsulting
Occasional Contributor

Re: EVA Preferred Path/Mode

Problem solved