Thank you very mutch for your fast anwer. i have 35Go RAM on primary VM and on the seconde datastore i have free 44Go (perhapst it's not enough for swap ???)
But now, whene i have separate this 3 VMDK of secondary on 3 séparately datastore, fault tolerance WORK
i don't understand why WORK now ?
other question please help me to know if now i can use this 3 séparately datastore for simple storage of other VM on my datacenter ? im afraid if i use this 3 datastore for other VM, fault tolerance will break ?
thx per advance for your help
Best regards