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| author | Stephen Rothwell <sfr@canb.auug.org.au> | 2010-03-11 13:09:36 +1100 |
|---|---|---|
| committer | Stephen Rothwell <sfr@canb.auug.org.au> | 2010-03-11 13:09:36 +1100 |
| commit | b93df6e69d4115b9ad8dfae5cacfc65e3883956f (patch) | |
| tree | 4fa4e7832cbe812dcced4e0e6d9ad27640f18a84 /Documentation | |
| parent | 45896c897cb321c2b005039ed166b1f13f78205f (diff) | |
| parent | 1ef37bd7422348e6171d6be208e04a79db0ccf2f (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. + |