| Josef Bacik | 3407ef5 | 2011-03-24 13:54:24 +0000 | [diff] [blame^] | 1 | dm-flakey |
| 2 | ========= |
| 3 | |
| 4 | This target is the same as the linear target except that it returns I/O |
| 5 | errors periodically. It's been found useful in simulating failing |
| 6 | devices for testing purposes. |
| 7 | |
| 8 | Starting from the time the table is loaded, the device is available for |
| 9 | <up interval> seconds, then returns errors for <down interval> seconds, |
| 10 | and then this cycle repeats. |
| 11 | |
| 12 | Parameters: <dev path> <offset> <up interval> <down interval> |
| 13 | <dev path>: Full pathname to the underlying block-device, or a |
| 14 | "major:minor" device-number. |
| 15 | <offset>: Starting sector within the device. |
| 16 | <up interval>: Number of seconds device is available. |
| 17 | <down interval>: Number of seconds device returns errors. |