Path to RDM-disk?

[henrikp80]

Hello there

We have several MSCS in our ESX enviroment running on a EVA 4400 SAN. The servers is running Biztalk and SQL.

My question is, what path should you use for the RDM-disks? For the datastores we use Round Robin. The I/O is really really heavy right now.

The default is MRU for RDM.

3 hosts, ESX 4, EVA 4400 SAN.

Cheers

//henrik

[a_p_]

At this time you will have to stay with MRU.

see http://kb.vmware.com/kb/1011340

Round Robin (RR)

...

This policy is not currently supported for Logical Units that are part of a Microsoft Cluster Service (MSCS) virtual machine

André

[mcowger]

Dont think OP said it was MSCS.

In general, except for specific guidance like for MSCS, you should use the same pathing policy for RDMs as for VMFS.

--Matt
VCP, VCDX #52, Unix Geek, Storage Nerd

[a_p_]

Dont think OP said it was MSCS.

Basically you are correct. He didn't say it, he wrote it

We have several MSCS in our ESX enviroment ...

André

[mcowger]

Ugh - i totally missed that

Good catch Andre.

--Matt
VCP, VCDX #52, Unix Geek, Storage Nerd