I am working on command line access to the state of physical storage in the cache. Currently the interface looks like
traffic_line --device /dev/sdb --cmd offline The --device must match a path in storage.config and if so, that physical device is marked offline as if it had failed. I'm in the final stages of cleanup for this feature, so it's time to comment on it if you think it could be better. The use case is for larger sites that have other mechanisms for monitoring disk health and want to be able to take a disk out of ATS before it causes problems (e.g., if the disk is hasn't quite completely failed it can be very slow instead of actually failing). Implementing this exposed an existing bug, TS-2500. P.S. I plan, someday, to add a command to bring a disk back online. So the values for --cmd should be 1) "up" / "down" 2) "online" / "offline" 3) "enable" / "disable" I also hope to document how the command passing works, in case there are other commands that would be useful to make available via traffic_line.
