I upgraded the bios to the latest version. We have ver 5.25 installed and the cpu runs @ 90 - 100%.
When looking at the profile we see the flash is using 65 - 85% cpu usage.
Any ideas on this?
Is any process writing/reading to disk? Hotspot, logs, proxy, other? Flash = Disk
Nope nothing.
It is on a work bench with only ethernet port connected to it.
Cant see internet as it is on ip 192… ethernet is on ip 10…
Only winbox connected to it.
Tried to make a support file but it crashed will try it again
try “/system reset” and see if this happens still
Will do
No Change,
I am trying to create a supp file but the system then disconnects
You have only 2MB memory free. This will cause all kinds of problems. I recommend to downgrade to v4.17 or v3.30 where memory usage was less
ok thanks lets see
It might help to remove unused packages like ups, mpls or hotspot.
OK,
4.17 is best to use even 5X is eating up cpu.
Thanks we did remove mpls … but version 5 still killed the cpu.
Wed only left dhcp routing ppp and what was needed hotspot all removed but CPU flash still ran high.
Looks like the software do a lot of swaps to the flash and then it kill the cpu.
When that happen it dropped all ethernet connections and radio …
Only way to get going is a power down scenario
We now are back on version 4.17 and it is fine.
now to change another 196 units … 
We managed to run 5.6 on RB133c. All newer versions we tried give problems.
We give every customer with old RBs a free replacement with a SXT. Keeping this old
RBs connected to our APs reduce overall performance. As we want to use nv2 and
nv2 runs smooth since 5.24.
I see there is still more flash writes than normal.
I am currently uninstalling packages will it have any harm to remove the wireless module and leave on the NV2 version active?