> On Jun 22, 2020, at 11:48 AM, Frank Scheiner <[email protected]> wrote: > > On 22.06.20 18:30, Gregor Riepl wrote: >>> Rethinking that, I assume if an UltraSPARC machine boots from a CDROM >>> drive attached to the built-in ATA controller and the installer later >>> can find the disc to start the installation, it should also work with >>> HDDs on that controller, though maybe not with UDMA speeds, but that was >>> a common issue with some older chipsets IIRC. Not sure if these issues >>> were with disc drives exclusively or also with disk drives. >> >> My Ultra 10 has a CMD646 though, which supposedly supports up to UDMA2. >> >> Dumb question: Did you check the cabling/jumper settings? > > No, not that I remember, it looked like from the factory. > > But I was also referring to something like [1]. And I also seem to > remember similar issues with ALi/ULi chipsets (e.g. used in Blade 100 > and 150). > > [1]: https://ata.wiki.kernel.org/index.php/Pata_cmd64x#Limitations > > Cheers, > Frank >
I should clarify that the experiments I’m running have the goal of using higher then UDMA2+ from a PCI connected ATA card that is BOOTABLE via openboot 3.31. So far I’ve got the bootable part several times over but the UDMA2+ is eluding me on sparc64. 1) As posted by Lloyd Parkes ages ago https://www.netbsd.org/ports/sparc64/faq.html#pci-cards <https://www.netbsd.org/ports/sparc64/faq.html#pci-cards> you can teach OpenBoot to treat some PCI IDE cards the same as the internal IDE controller. This lets you boot. I can post a longer explanation if you need to see specifically how this works. You can quickly tell if a card is worth trying if your “show-devs” at openboot has some weird path into the /dev tree. When you add to the nvram you basically fix that so it knows it’s an IDE controller. 2) I have not been able to install Debian Sparc64 9 or 10 using this process which is what this thread was looking for answers to, but I have managed to get OpenBSD 6.2+ to work fine, EXCEPT that I get UDMA2 / PIO4 out of it. I think I get about 21MB/sec using repeated DD if/of tests. What I really want to see is 100MB/sec. I have SCSI PCI cards and all that, this is just really an itch I have to scratch. So I take a run at it every 6-8 months. -Mike
