dm-flakey ========= This target is the same as the linear target except that it returns I/O errors periodically. It's been found useful in simulating failing devices for testing purposes. Starting from the time the table is loaded, the device is available for <up interval> seconds, then returns errors for <down interval> seconds, and then this cycle repeats. Parameters: <dev path> <offset> <up interval> <down interval> <dev path>: Full pathname to the underlying block-device, or a "major:minor" device-number. <offset>: Starting sector within the device. <up interval>: Number of seconds device is available. <down interval>: Number of seconds device returns errors.