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| author | Stephen Rothwell <sfr@canb.auug.org.au> | 2011-03-01 14:19:10 +1100 |
|---|---|---|
| committer | Stephen Rothwell <sfr@canb.auug.org.au> | 2011-03-01 14:19:10 +1100 |
| commit | d075a9bbfc738da2606b61f9427f7cd9c3eff7d1 (patch) | |
| tree | c8b6c95e73a86b41e0cb9e4c2b03e73319b25325 /Documentation | |
| parent | b99548a796a5650631742c3a7c2dd535c89ae9e5 (diff) | |
| parent | de0fe84496af2fb104d5623937b1b6c0605f8273 (diff) | |
Merge branch 'quilt/device-mapper'
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/device-mapper/dm-flakey.txt | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/Documentation/device-mapper/dm-flakey.txt b/Documentation/device-mapper/dm-flakey.txt new file mode 100644 index 000000000000..115cccaa17ef --- /dev/null +++ b/Documentation/device-mapper/dm-flakey.txt @@ -0,0 +1,18 @@ +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. + |