From: theom+news@chiark.greenend.org.uk   
      
   druck  wrote:   
   > It may still work on the Pi 2B, but being slower you may need to   
   > increase the value of rootwait in cmdline.txt - particularly if it is a   
   > spinning disc rather than an SSD - it could take 60 seconds before the   
   > drive is readable.   
      
   I think the problem here is that start.elf, config.txt, the kernel and   
   cmdline.txt are all on the USB device - you can't put a timeout in   
   cmdline.txt because by that point you already need the USB device up to read   
   that file.   
      
   The alternative approach would be to have a regular bootcode.bin, start.elf,   
   kernel, etc on the SD card and then tell the kernel to find its rootfs on a   
   USB drive, at which point rootwait may help.  (I think Bob is using FreeBSD   
   but there is probably an equivalent option there).  Or to interpose u-boot   
   for the 'kernel' on the SD card, and then tell u-boot to find the kernel on   
   USB.   
      
   Theo   
      
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