i have create replication node with iscsi failover

when i start 1 VM , all is ok , latence (VM reporting) is under 20 ms
but when i start 10 VM latence up to 1500 ms ! and i need up 1 hour to start all VM

actualy i use 1 nic (GB) for iscsi

on my NAS i have raid 5 with SAS disk
and i use hw raid Areca ARC 1880

i need to restart vm for my trainning class

you have an idea to get better result.

Regard Sebastien.