Are the files in the sys:\etc\dns directory suppose to be marked read only.

I noticed that some dns updates were not happening, went to one of the dns
servers and saw :
critical: unable to get all rr's of zone with error 303
and same for the

I looked at the sys:\etc\dns files and all were marked RO. I flaged them,
left it for a few min and made some more changes to dns and they started to
take effect.