Hello to all!

First of all it’s my own research
and if you can add something - you are welcome =)
i’m created small script that you can run in console and observe for sector writes in dynamics:
{:local secrw
:local secrwcurr
:while (true) do={
:set secrwcurr [/system resource get write-sect-since-reboot ]
if (secrw != secrwcurr) do={
:put " $[/system clock get time] $secrwcurr +$($secrwcurr-$secrw)"
:set secrw $secrwcurr
}
/delay delay-time=5
}}
.
Result looks like:

.
To minimize “writing” your need to tuning 2 things:
1’st: Set DHCP: Store Lease on disk to: never

/ip dhcp-server config set store-leases-disk=never
.
.
2’nd: Disable running check on wireless interface
/interface wireless set [ find default-name=wlan1 ] disable-running-check=yes
/interface wireless set [ find default-name=wlan2 ] disable-running-check=yes
.
Regarding second statement - i’m see nand writing each time when interface change state from S to RS (non running to running) and vice versa
May be it’s a bug… may be by design… (strange behavior at all)
Wireless interface change state:
when no one are connected - not running (S)
when at last one client connected - running (RS)