Using both eMMC and uSD

Hello All, I have successfully managed to boot my beaglebone Black from both the uSD and eMMC. I currently rely primarily on the uSD. But I had this question. Is it possible to create a setup whereby the boot section (including Kernel Image, U-Boot, MLO and ENV.txt) and a portion of the root file system (the /bin, /sbin, /usr/bin, /usr/sbin directories) are on the emmc whereas the rest of the root file system is on the uSD ? This would allow for fast booting and execution of binaries without limiting one to the 2GB of onboard eMMC available.

I’d imagine this would require editing the fstab file. Any advice on this is appreciated thanks!