zfcp.646ca0<bus ID of the zfcp device>: QTCB version 0x<requested version> not supported by FCP adapter (0x<lowest supported version> to 0x<highest supported version>)
See message text.
The queue transfer control block (QTCB) version requested by the zfcp device
driver is not supported by the FCP adapter hardware.
User response
If the requested version is higher than the highest version supported by the
hardware, install more recent firmware on the FCP adapter. If the requested
version is lower then the lowest version supported by the hardware, upgrade
to a Linux level with a more recent zfcp device driver.