SE/30 freezes when trying to access a floppy disk

[keropi6k6]

Hiya !

My SE/30 started doing this yesterday: once you insert a floppy disk it access it twice , the hdd/trashcan/alias icons on desktop disappear and the system freezes. 

On reset the mac will eject the floppy disk.

I have a BMOW Rominator-II and it also freezes with the ROM/RAM boot options - so it's not something going on with the hdd-system setup. Already tried re-sitting cables and do a visual mobo inspection - all look good.

Any idea what this could be?

Thanks!

 

[keropi6k6]

I think some ram is bad - disabling 32bit mem-access (so 8MB is useable) does not freeze the system with rom boot

on normal hdd OS boot I get this error:

Sorry, a system error occurred.

"Finder" 

     unimplemented trap

will try with some new ram tomorrow unless someone else suspects something else  :b&w:

edit: do I need ram with parity for the se/30?