On a system running the Linux version 7 using the Red Hat compatible kernel, when using fwudpate to update firmware on an installed NVMe device, if a device reset is required as part of the update, once the reset is performed the device might go offline.

Workaround

If an NVMe device goes offline or no longer appears to the operating system after a firmware update, a power cycle of the server is required to bring the device back online.

This issue has not been seen on systems running the Oracle Linux UEK kernel (UEK4 or UEK3). If your Linux 7 systems have NVMe devices, upgrade to Oracle Linux UEK3 or UEK4.