IO Analyzer Hitting Local Disk

Hello -

Our team is trying to use IOAnalyzer, however, it appears all of the I/O is hitting disk1 as opposed to the second disk that we've configured. Our setup is as follows:

1 Master with 8 workers.

Each appliance has disk 1 (sda) configured to reside on local storage of the host.

Each appliance has disk 2 (sdb) configured to reside on an iSCSI LUN.

After running the workload, the write/read requests are hitting the local disk (mpx.*) of the ESXi hosts. The iSCSI LUN (eui.*) show no I/O. Are we configuring the IO analyzers incorrectly? Do disk1 and disk2 need to reside on the same datastore?

Thanks in advance for the help.