[expert] Cant mount Root FS

[Bob Silva]

Anyone have any ideas where I might be going wrong here:   Promise ATA-100 PCI card with 2 IBMs attached. Base Mandrake kernel 2.2.17 works perfectly with the card... boots into /dev/hde1   When I upgrade the kernel to 2.4.x ( I tried 0, 2, and 3), when booting up, it gives this error:   request_module[block-major-33]: Root fs not mounted VFS: Cannot open root device "2101" or 21:01 Please append a correct "root=" boot option Kernel Panic: VFS: Unable to mount root fs on 21:01   Now this baffles me because Im switching from RH6.2 which I had no problems loading a 2.4.3 kernel. Common sense tells me it since its kernel space...there shouldnt be any difference that this is Mandrake now.   The default kernel boots up fine, but this is an SMP box and I also want to run iptables. lilo.conf: image=/boot/vmlinuz  label=linux  root=/dev/hde1  read-only   Compiled 2.4.3 with gcc-2.95.2, all other software are proper levels. Kernel builds fine, just doesnt boot. Like I said, when this was a RH6.2 box it loaded a 2.4 kernel fine with the promise card. Thanks for any assitance you can provide.   Bob Silva bob @bravenet.com