Hello Hans, On Mon, Mar 18, 2024 at 12:07:37PM +0100, Hans de Goede wrote: > > > > So I have honestly no idea how this works... > > > > Perhaps the ASMedia firmware takes the command to port0-port3, > > and instead of sending it to the PMP, it sends back some faked > > reply instead? > > Yes I believe that this is what is happening, the physical-ports 0-3 > are obviously connected to the JMB575 Port Multipliers, but I believe > the "emulated" ports seen by the OS are mapped like this: > > 0-3 Only show as connected to the OS is connected directly to a disk > without a PMP > 4-19 Only show as connected to the OS when PMPs are used and the mapped > port on the PMP has a disk connected > I'm not sure, see: https://lore.kernel.org/linux-ide/CADUzMVaFcD26QiBK_eKCbtC5Ot-+hAruNbUx+2pQNTKtMhDGRA@xxxxxxxxxxxxxx/ Ioannis has an external PMP, and on v6.6, he sees two disks. But on v6.8 he only sees one disk. It is a bit unfortunate that he did not provide a full boot log, but he claims that both disks are connected to the same PMP. Kind regards, Niklas
