Dear All, after posting on the OpenSUSE forum ( https://forums.opensuse.org/showthread.php/511116-Sata-card-erratic-behaviou... ) and on Unix Stackexchange ( http://unix.stackexchange.com/questions/244419/marvell-88se9128-9123-sata-ca... ) it was suggested this may be a case for the mailing list. So a short description (for those not reading the threads at the links - but extensive dmesg output is linked in the two threads): I have a Dell T20 home server with OpenSUSE and use a Marvell 88SE9123 (labelled 88SE9128) chipset based SATA card (2 ports) of which one is used. When a drive is connected to the SATA card and written to (file copy or zero fill) it will drop randomly and vanish from the listed devices, taking a reboot to reappear. The drive is definitely OK (recertified Seagate) and an alternative drive has also been tested. When using Windows (even installing on the Dell on a spare harddrive), the SATA card tests fine running 5 passes of a 32GB CrystalDisk benchmark - using the same cable as well as the same harddrive (and alternative harddrive has been tested too just in case). But Linux... trouble... - I have now tested a Ubuntu LiveUSB with Kernel 3.13, OpenSUSE 13.2 with Kernel 3.16 - and regularly the server runs on OpenSUSE Leap 42.1 (Kernel 4.1 right now). Whether Native Command Queuing is on or off seems to make no difference whatsoever - be it on the fly via command line or as a Kernel parameter. My conlusion is therefore that the problem can only be in two locations: 1) the Linux driver OR 2) the card's firmware itself (I cannot chose any kinds of settings on the card - it has the latest available BIOS, it is a StarTech PEXSAT32) Maybe someone here has any ideas? Side note: I am happy to collect logs etc. but while I am spending seemingly more and more time with Linux, I do not have any troubleshooting experience and would appreciate precise idiotproof instructions if extra logs/etc. are required. Many thanks. -- To unsubscribe, e-mail: opensuse-kernel+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse-kernel+owner@opensuse.org