Hi everyone, I am currently using RHOSP 16.2.4 and launched a virtual machine (VM) using a volume. From the attach information, I confirmed that this volume was mounted on ports 1 and 2 through HBA1 and HBA2 on the compute node. When I checked the devices on the compute node, I found two devices, which is as expected. [root@overcloud-novacompute-0 heat-admin]# multipath -ll LUN-UUID dm-5 FUJITSU,ETERNUS_DXL size=10G features='1 queue_if_no_path' hwhandler='1 alua' wp=rw `-+- policy='service-time 0' prio=10 status=active |- 3:0:2:1 sdl 8:176 active ready running `- 5:0:5:1 sdv 65:80 active ready running [root@overcloud-novacompute-0 heat-admin]# ll /dev/disk/by-path/ lrwxrwxrwx. 1 root root 9 Aug 20 08:51 fc-HBA1-port1-lun-0 -> ../../sdv lrwxrwxrwx. 1 root root 9 Aug 20 08:51 pci-0000:00:0a.0-fc-port1-lun-0 -> ../../sdv lrwxrwxrwx. 1 root root 9 Aug 20 08:51 fc-HBA2-port2-lun-0 -> ../../sdl lrwxrwxrwx. 1 root root 9 Aug 20 08:51 pci-0000:00:0b.0-fc-port2-lun-0 -> ../../sdl I then shut down the VM and the compute node, and replaced HBA1 with HBA3 on the compute node. Under these circumstances, the volume should be mounted on ports 1 and 2 through HBA3 and HBA2 respectively. In other words, I think I should be able to find the following devices. device1: fc-HBA3-port1-lun-0 -> ../../sdl pci-0000:00:0c.0-fc-port1-lun-0 -> ../../sdl device2: fc-HBA2-port2-lun-0 -> ../../sdv pci-0000:00:0b.0-fc-port2-lun-0 -> ../../sdv However, after restarting the compute node and the VM, although the connection and read/write operations are functioning normally, the compute node fails to find the volume on HBA3. [root@overcloud-novacompute-0 heat-admin]# multipath -ll LUN-UUID dm-5 FUJITSU,ETERNUS_DXL size=10G features='1 queue_if_no_path' hwhandler='1 alua' wp=rw `-+- policy='service-time 0' prio=10 status=enabled `- 5:0:5:1 sdl 8:176 active ready running [root@overcloud-novacompute-0 heat-admin]# ll /dev/disk/by-path/ lrwxrwxrwx. 1 root root 9 Aug 20 08:51 fc-HBA2-port2-lun-0 -> ../../sdl lrwxrwxrwx. 1 root root 9 Aug 20 08:51 pci-0000:00:0b.0-fc-port2-lun-0 -> ../../sdl Could you please advise on how I can make the compute node find the volume on HBA3 in this scenario? And I would like to know how to change the Initiator from HBA1 to HBA3 in the initiator_target_map of DB without detach volume? Regards, Inori.