Hi Mister Heo, first, thank you so much to have taken the time to answer. I sure can understand your point, i have spent some time too see what was supported and what was not and finally, i have equipments that looks like are not working together. But on the other hand, it is not easy to try to stick to known working configurations since, from what i have seen, the chip inside enclosures are rarely exposed to consumer. It will probably changes nothing but, i am pretty sure now that this is not an hardware incompatibility since, i have spent some time yesterday, doing a FreeBSD install on a spare disk, in one of my computer with the Marvell 88SE9120 controller and, when i hooked up the Mediasonic enclosure (which, i finally found out is using a JMicron JMB393 chip (0x197b:0x0325)), i was able to see all four drives without any issue (with the FreeBSD ahci driver of course). Best regards, Tony On Fri, 2013-08-09 at 10:30 -0400, Tejun Heo wrote: > Hello, > > On Wed, Aug 07, 2013 at 12:11:07PM -0400, DeadManMoving wrote: > > i am unable to get SATA port multiplier to work between a Marvell SATA > > 88SE9120 CARD (HighPoint Rocket 622A) and four disks within a Mediasonic > > HF2-SU3S2 enclosure. > > > > Howerver, the Mediasonic enclosure is working with a SiI 3132 controller > > (i can see all four disks) and also, i have a Thermaltake BlacX Duet > > which is working on the 88SE9120 (i can see both disks). > > > > Here is what the kernel have to say when i try to get the 88SE9120 to > > work with the Mediasonic enclosure : > > Unfortunately, I kinda gave up on PMP / controller compatibility > issues and it seems like most vendors have given up on PMPs too. > After the first gen chips, nobody is really working on it, and the > first gen chips of course are full of quirks and bugs. At this point, > I'd generally recommend against using PMPs and if you really want to > stick to known working configurations. > > Sorry. > -- To unsubscribe from this list: send the line "unsubscribe linux-ide" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html