Dan Markarian wrote: Hi Chris, You could just insert your own d_open and d_close routines which track what you need and call into the original function when done. I've traced the use of these function calls and my filesystem does not close the device... it appears that something else behind the scenes on a logout/login does it. If the device is reopened it works happily... but I would expect that a user context shouldn't influence a devices state. I am not sure why the debug driver does not load. You can verify it with the following command after installing it. Be certain that the source it built on the appropriate system version as well. kextload -nt /System/Library/Extensions/IOStorageFamily.kext I ran this and it said the kext appears to be valid. If I reboot with the partition as the default startup system it displays an apple with a black line above it (appearing like it is displaying text, maybe the reason why it fails, but the box isn't big enough). If I boot with the partition not as default then a "no entry" sign appears. Note: I failed to mention the OS is 10.2.8 on G4. Dan On Jan 15, 2004, at 5:59 PM, Chris Walters wrote: Dan Markarian wrote: Hi Chris, It sounds like your open on the device was closed at some point. The strategy will return an EACCES on a read should that device not still be open. The Storage Family does not return EACCES on a read in any other context, however, it is plausible the error came from a driver below the family, of course. This is the case... the device was closed, but I'm pretty sure it wasn't by our driver. If I load my FileSystem from within a login the strategy succeeds. What I find is when I log out and then back in (even as the same user) I get the EACCES error. I initially ran into this problem by starting my FileSystem on boot and trying to do tests as a user. I have traced using gdb into the media layer which returns the error. I can only assume that another entity is closing the device (maybe prompted by the logout or login). This is why I want to have a debug version of IOStorageFamily so I can see when the device is closed. Any ideas? Thanks. Dan On Jan 14, 2004, at 6:33 PM, Chris Walters wrote: I'm developing a File System which is getting an EACCES error from doing a strategy call to the IOStorageFamily. I need to be able to build and install a debug version of IOStorageFamily. Building it is easy (with either ProjectBuilder or pbxbuild)... the problem is when I install and restart the system I get the "No Entry" symbol. Could somebody explain why my kext isn't working... * do I have to copy more than just the kext? * is there a difference between building with ProjectBuilder or pbxbuild? Thanks. _______________________________________________ darwin-kernel mailing list | darwin-kernel@lists.apple.com Help/Unsubscribe/Archives: http://www.lists.apple.com/mailman/listinfo/darwin-kernel Do not post admin requests to the list. They will be ignored. _______________________________________________ darwin-kernel mailing list | darwin-kernel@lists.apple.com Help/Unsubscribe/Archives: http://www.lists.apple.com/mailman/listinfo/darwin-kernel Do not post admin requests to the list. They will be ignored. _______________________________________________ darwin-kernel mailing list | darwin-kernel@lists.apple.com Help/Unsubscribe/Archives: http://www.lists.apple.com/mailman/listinfo/darwin-kernel Do not post admin requests to the list. They will be ignored. _______________________________________________ darwin-kernel mailing list | darwin-kernel@lists.apple.com Help/Unsubscribe/Archives: http://www.lists.apple.com/mailman/listinfo/darwin-kernel Do not post admin requests to the list. They will be ignored.