>>> Also, if running in writethrough, why shouldn't an SSD be allowed to be added in realtime? >> If you're running in writethrough, you'd already be caching... not sure >> what you mean? Perhaps he means being restricted to only being able to add a write-through cache without the superblock prep? On a reboot or cache device fault event it would not cause any corruption, just performance impact back to where it was before the device was added. -- To unsubscribe from this list: send the line "unsubscribe linux-bcache" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html