I buit a kernel, with embedded MFS, MD_ROOT_SIZE was 8 Megs. Kernel booted and worked fine. After increasing MD_ROOT_SIZE to 16 Megs, BTX prints a hexdump and freezes. A dump looks like this (I've taken first line only) int=0000000d err=0000e14c efl=0010006 eip=0eff30c4 ... BTX halted Any ideas how to fix this ?