Hi, It would be recommended to have downtime and swap over both, but I don’t think it would hurt anything to try it this way, it just make not work until the controllers are rebooted.
The system: SCv3020 with FC front-end and actual firmware. Each controller has one extension slot free. The goal is: add the iSCSI connectivity front-end card without storage service interruption. The plan looks not hard technically: - Check the FC multipathing; - Shut down first sub-controller (via DSM or web-console), extract it, add iSCSI card (from Dell), plug the sub-controller in; - Wait for first sub-controller to load and run FC sevice; - Shut down second sub-controller, extract it, add iSCSI card, plug the sub-controller in; - Wait for second sub-controller to load and run FC sevice; - Check the FC multipathing and FE-port balancing; - Proceed to iSCSI configuration. The remaining questions: I'm sure the 'big models' are able to continue to operate in such circumstances, but what about 'low-end models'? Is such operation supported? Will the storage operate fine while the first sub-controller is already upgraded, but the second one - not? May the storage require both controllers restart after both iSCSI cards have been installed? Could the arguments not to do such operation (but completely switch the storage off for maintenance) exist?
Online SCv3020 front-end upgrade - is possible?