>On Sat, 5 Mar 2011, Kjetil Oftedal wrote: >> >> Hi, >> >> With regards to testing on sun4d, I have run into problems with the >> existing kernel, during the process of getting a test system up and >> running. The system is unable to mount partitions correctly, >> (both ext2 on a hdd, and iso8859 on a cdrom), however dd, running from an >> initrd filesystem is able to read the ext2 blocks correctly. So I have >> started investigating this instead. >> >> Is there anyone aware of any alignment requirements in the sun4d on DMA >> transfers and such ? Or have the datasheet for the FAS2x6 (236) scsi >> controllers ? > > First check that you can see the drive correctly from the OBP > ok> probe-scsi-all > > If that is OK try booting with no SMP, I forget the correct incantation > but something like "max-cpus=1" sounds familiar. > > You could also try booting with a 2.2.x kernel, if that does not work > something is SERIOUSLY wrong. 2.2.x does not support SMP and has > always booted OK for me. > > Do you have Solaris, it should boot and run 2.6, 7, or 8 (last supported). > If this fails you certainly have hardware issues. > > Sorry to be vague, there has been no properly working Sun4d kernel > since 2.2.x so expect to find bitrot in all sorts of obscure places. Hi again, probe-scsi-all reports no duplicate devices or anything else that might indicate problems. I have now tested with debian hamm, which uses some flavour of linux-2.2, and that was able to mount the filesystem and read files successfully. The linux-2.6 kernels I build are non-SMP ones, as SMP disables the ability to jump back to openboot, so SMP is problably not the source of the scsi problems. The exact problem manifest with a successful mount of the filesystem. But it is not possible to read or list any files on the ext2 parition. # mount /dev/sda2 /mnt EXT2-fs (sda2): warning: mounting ext3 filesystem as ext2 # cd /mnt # ls EXT2-fs (sda2): error: ext2_check_page: bad entry in directory #2: : rec_len is smaller than minimal - offset=0, inode=0, rec_len=0, name_len=0 # I have dumped out the memory area ext2_check_page is reading and it contains only zero-data. Hence, the error message. As mentioned if I use dd to access the same block on sda2 directly I get the correct data. (Address verified by enabling scsi command debugging messages in the esp driver) Kjetil Oftedal -- To unsubscribe from this list: send the line "unsubscribe sparclinux" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
