Boot question

[jmh6]

Hi,

   I recently 'copied' a linux OS from a 16MB SD card to a 32MB card.

   Eventually I figured out UUID enough to get that new device with 
different UUIDs up and running.

   After linux loads and the initrd are loaded, the linux kernel tries to 
find the 'boot SD'.

   There is some kind of timing issue.... The /dev/sdc loads but the 
partitions are not yet visible and the boot aborts and prints a message 
suggesting that a bigger 'rootdelay' be used.

   I then enter a line 'rootdelay=20' and ctrl-alt-del reboot. Often but 
not always starts successfully.

   I am wondering if/how I can tell this last stage of the boot process to 
use the UUID device rather than try to use /dev/sdc? Perhaps some line in 
grub or in /etc?

   Perhaps there is a simpler way to 'fix' this last problem.

   Thanks in advance for your time and help.

   The OS is vmlinuz-4.9.212-antix.1-486-smp.

   warm regards,
   John