i am migrating from 2.6.32 to 2.6.34, and new kernel refuses to mount root. It says it can't find root, and can not mount it. It tries all FS drivers (ext2, ext3, ext4), and failes to mount. 2.6.32 can mount it properly using ext4. The grub sections are identical: title Gentoo Linux (2.6.32-xen-r1-Gentoo-uranus-1-15 works with xorg.conf_works_2010_06_07) root (hd1,0) kernel /xen.gz module /vmlinuz-2.6.32-xen-r1-Gentoo-uranus-1-15 root=/dev/md5 odmraid \ root_=UUID=3ae46540:5da32e75:3b8ef3b3:48c699fd \ loop.max_part=63 max_part=63 panic=30 quiet noresume_ \ vga=794 video=1280x1024 vgaa_=normal nomodeset savedefault title Gentoo Linux (2.6.34-xen-r1-Gentoo-uranus-1-18 works with ...) root (hd1,0) kernel /xen.gz module /vmlinuz-2.6.34-xen-r1-Gentoo-uranus-1-18 root=/dev/md5 odmraid \ root_=UUID=3ae46540:5da32e75:3b8ef3b3:48c699fd \ loop.max_part_=63 max_part_=63 panic=30 quiet_ noresume_ \ vga_a=794 video_o=1280x1024 vga_a=normal nomodeset savedefault This will explain what my raid chains are: uranus ~ # cat /proc/mdstat Personalities : [linear] [raid0] [raid1] [raid10] [raid6] [raid5] [raid4] [multipath] [faulty] md3 : active raid0 sdb3[1] sdc3[2] sdd3[3] sda3[0] 7839232 blocks 64k chunks md5 : active raid5 sdb5[1] sdc5[2] sdd5[3] sda5[0] 29326272 blocks level 5, 64k chunk, algorithm 2 [4/4] [UUUU] md6 : active raid5 sdb6[1] sdc6[2] sdd6[3] sda6[0] 87907392 blocks level 5, 64k chunk, algorithm 2 [4/4] [UUUU] md7 : active raid5 sdb7[1] sdc7[2] sdd7[3] sda7[0] 146512512 blocks level 5, 64k chunk, algorithm 2 [4/4] [UUUU] md8 : active raid5 sdb8[1] sdc8[2] sdd8[3] sda8[0] 2599059648 blocks level 5, 64k chunk, algorithm 2 [4/4] [UUUU] unused devices: <none> uranus ~ # During 2.6.34 boot, kernel can assemble properly the md3 chain; it's the last thing I can see on screen before the panic message. A bit earlier, I can read that on sda, it finds all partitions from 1 to 8. You will see that the .config after make menuconfig are almost identical, and, do not miss essential thing. To me, either the kernel just panics after failing to mount md3 (and forgets to try to mount other md devices), or forgets to try to build md devices on top of logical partitions. I will try to get a log from serial port, but I can't promise.
Created attachment 236551 [details] /boot/config-2.6.32-xen-r1-Gentoo-uranus-1-15
Created attachment 236553 [details] /boot/config-2.6.34-xen-Gentoo-uranus-1-18
Created attachment 236557 [details] /tmp/diff diff config-2.6.32-xen-r1-Gentoo-uranus-1-15 config-2.6.34-xen-Gentoo-uranus-1-18 >/tmp/diff
