Re: Online: Bizarre disk interactions

Hi Cosmo, Okay, here is the definitive picture: 1. When accessing the primary chunk of the root dbspace, online uses the current ROOTPATH as defined in the onconfig file. 2. The value of ROOTPATH when the instance is initialised (oninit -iy) is stored in the reserved pages. This is what is reported by onstat -d, oncheck -p etc. You cannot change this value. However, OnLine will use the value from ONCONFIG as described in (1) above when accessing the chunk. 3. When a chunk is added into OnLine for the first time (for the rootdbs primary chunk this is at instance initialisation time) pathname that defines the chunk (the real path, not any symbolic link that points to the path) must be mode 660 (rw-rw----) and owner/group informix/informix. If these criteria are not met, the chunk cannot be added to OnLine. 4. Once the chunk is known to OnLine, it will not subsequently check the permissions or ownership when it opens the chunk, even if you stop and restart the server. 5. Because OnLine runs as root, it can access a chunk even if the chunk is mode 000. I hope that clarifies things. Regards, Chris -- ------------------------------------------------------------ Chris Jenkins, Advanced Technology Group, Informix Software Standard disclaimers apply