Heping He wrote: > Hi, I tried to install gentoo on my AMD 64 dual core machine. It has > four 500 GB HDs. I followed the instruction on > http://www.gentoo.org/doc/en/gentoo-x86+raid+lvm2-quickinstall.xml. I > replaced /dev/md4 with raid5 instead of raid0. Here is the list of > each HD's partitiion: > > /dev/sda: > partition #, boot start end type > 1 * 1 18 fd > 2 19 361 fd > 3 362 end fd > > /dev/sdb > partition #, boot start end type > 1 1 361 82 > 2 362 end fd > > /dev/sdc is the same to /dev/sda, and /dev/sdd = /dev/sdb > > I created /dev/md1, /dev/md3 and /dev/md4: > mknod /dev/md1 b 9 1 > mknod /dev/md3 b 9 3 > mknod /dev/md4 b 9 4 > > and then form raid: > mdadm --create /dev/md1 --level=1 --raid-devices=2 /dev/sda1 /dev/sdc1 > mdadm --create /dev/md3 --level=1 --raid-devices=2 /dev/sda2 /dev/sdc2 > mdadm --create /dev/md4 --level=5 --raid-devices=4 /dev/sda3 /dev/sdb2 > /dev/sdc3 /dev/sdd2 > > /dev/sdb1 and /dev/sdd1 forms the swap space > > mount: > mount /dev/md3 /mnt/gentoo > mount /dev/md1 /mnt/gentto/boot > > /dev/md4 is for lvm2 and /usr, /home, /opt and other common unix dir > are created there > > after chroot and emerge, I issued emerge grub and modified > /boot/grub/grub.conf > > default 0 > timeout 10 > > title gentoo > root (hd0,0) > kernel /boot/kernel root=/dev/md3 > > and issue grub > grub> root (hd0,0) > .... > grub> setup (hd0) > .... > grub> root (hd2,0) > ..... > grub> setup (hd2) > ..... > grub> quit > > When I reboot, the kernel issued a panic msg: it says can't read > /dev/md/3 or (hd2,0) is invalid device. > > Any idea what went wrong? > > Thanks in advance for any suggestion. > > --HH I'm running a similar RAID setup and I found that I must add " root=/dev/md3 md=3,sda3,sdb3,hda3 ". It seems that md3 must be defined. At least I had kernel panics until I added this.
Chuck
