If you want to swap for a GA-8IRX and a standalone Promise, let me know. :) On Tuesday 30 July 2002 11:22 pm, noname@xxxxxxxxxx wrote: > This might be no news to some but here are some observations about > the Promise 20267 chipset fitted to a Gigabyte Titan mobo. > > > 1. No success using 'harware' RAID, so I set the BIOS to make > the 20267 look like another 2 ATA devices. Used a suitable > "append=" line when booting to get ide2 and ide3. It's a > slippery little gadget sometimes appearing at IO address > starting at 0x9400 and other times at 0x9800, depending on > what features are enabled in the BIOS. > > > 2. It doesn't like to share interrupts. On my mobo it got IRQ 11 > which was also assigned to a USB device. Produced register > dumps when the kernel was booting. I disabled USB on the mobo, > the 20267 got IRQ11 all to itself and was happy to start. > > 3. No DMA. The IDE driver that comes with 7.3 can't talk to the 20267 > in DMA mode. It runs in PIO mode only & seems to run reliably. > "hdparam -t /dev/hde" produces terrible figures. The same HDD > (60GB Maxtor) produces good figures when connected to ide0. > > > 4. Geometry. The BIOS does understand more than two IDE controllers > so if you want Linux to use a specific geometry, its more > "append=" line work. > > > > In summary, the 20267 chipset is bad news and not worth the trouble. > > There seems to be some hostility to this chipset by Linux developers > because Promise are secretive about the chipset specs. The secrecy > could be that Promise are protecting their valuable IP, but could also > be that the chipset is not much good and Promise don't want the > tough judges to find out. > > > > > > > > > ------------------------------------------------- > This mail sent through IMP: http://horde.org/imp/ > > > > _______________________________________________ > > Ataraid-list@xxxxxxxxxx > https://listman.redhat.com/mailman/listinfo/ataraid-list
