Clean OS (Debian), OpenMediaVault and other "firmwares"

My Cloud OS 3 Personal & Network Attached Storage My Cloud
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From init script (Barebox / bootloader):

#./boot
sata # initialize SATA
sataenv run 7 # try to run script from partition 7
sataenv run 8 # try to run script from partition 8
. /env/bin/boot_sata # if all else fails, use this script to boot

Normal boot script commented, so no possible to boot from any other device except sata. Sorry.