Our cloudstack (4.9.1) group have 4 primary storage named as A/B/C/D, almost all vm disk image in A storage. only one vm (name VMC1) disk image in C storage.
yesterday , we close VMC1 and change the C storage to maintance state, then stop the NFS service in C storage , after that , all vm stoped , whatever vm disk image in A or in C, we were stunned. In cloudstack website , we found follow doc , but it descripte stops all VMs stored on C storage device in my situation, what happenned ? Primary Storage Outage and Data Loss¶ When a primary storage outage occurs the hypervisor immediately stops all VMs stored ——> on that storage device <—— . Guests that are marked for HA will be restarted as soon as practical when the primary storage comes back on line. With NFS, the hypervisor may allow the virtual machines to continue running depending on the nature of the issue. For example, an NFS hang will cause the guest VMs to be suspended until storage connectivity is restored.Primary storage is not designed to be backed up. Individual volumes in primary storage can be backed up using snapshots.
