On Tue, Jul 1, 2008 at 9:39 AM, Christian Gardner <[EMAIL PROTECTED]> wrote: > Hi all, hope someone can help me out, it's been five years since I last used > LFS (or linux for that matter!) so I'm a bit rusty... > > I've gone through the LFS6.3 book. It all seems to go fine until I boot up > the new system. These are the last three lines before it totally freezes: > > List of all partitions: > No file system could mount root, tried: > Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(0,0) > > So what's going on? I've looked through the FAQ and the mailing-list archive. > These suggest that I need to enable SCSI support when compiling the kernel > (in the Ubuntu 7.xx distro I'm using as a host, my hard drive is sda not > hda). Well I'm pretty sure I've done that! > > Tried compiling a 'vanilla' kernel, ie left everything alone in menuconfig - > didn't work. > Tried ticking a few options in menuconfig with the letters 'scsi' in them - > didn't work... but there are so damn many, what *exactly* am I supposed to be > enabling? > Tried using the .config from the Ubuntu distro... didn't work. > Tried plopping the kernel from the Ubuntu distro straight into the /boot of > the LFS partition... didn't work.
Almost certainly it's because the necessary driver is not compiled into the kernel. The Ubuntu .config and kernel will probably not work for you because the drivers are modules and you need to have an initramfs to load them before mounting root. I don't recall the exact settings, but I think you'll need the following: For libata (newer SATA/PATA drivers): CONFIG_ATA=y CONFIG_[SP]ATA_$yourcontroller=y CONFIG_SCSI=y CONFIG_BLK_DEV_SD=y # this is SCSI disk support For IDE (older drivers): CONFIG_IDE=y CONFIG_BLK_DEV_IDE=y CONFIG_BLK_DEV_IDEDISK=y CONFIG_BLK_DEV_$yourcontroller=y You can compile both libata and IDE into your kernel, and only one will be used. I forget which one is default in 2.6.22, but I think SATA disks will use libata and PATA disks will use IDE. If libata is loaded, you'll get /dev/sd* disks, and /dev/hd* disks for IDE. -- Dan -- http://linuxfromscratch.org/mailman/listinfo/lfs-support FAQ: http://www.linuxfromscratch.org/lfs/faq.html Unsubscribe: See the above information page
