The LED blink numbers (to have them handy with no ssh) in SP3x, FW 2.5.64,
mean such boot phases (init.d scripts):

20 logging
 4 mount/misc
 5 logging_nvm/hotplug
 6 hostname
 7 netplug
 8 nfs
 9 cron
11 spi
12 cryptodev
13 squid (loading FPGA)
 2 spondoolies (is IP assigned)
 3 spondoolies (no IP assigned)