Thanks
Thanks very much - a little sleuthing and differentiating the various interfaces that are installed, it seems as if this one is:
04:00.0 SATA controller [0106]: JMicron Technology Corp. JMB58x AHCI SATA controller [197b:0585]
Subsystem: JMicron Technology Corp. JMB58x AHCI SATA controller [197b:0000]
Kernel driver in use: ahci
Kernel modules: ahci
so on the list of recommended controllers, I gather.
Best regards,
Neil