Andriy Gapon a51eb0a964 MFV r318942: 8166 zpool scrub thinks it repaired offline device ... illumos/illumos-gate@2d2f193a21 2d2f193a21 https://www.illumos.org/issues/8166 If we do a scrub while a leaf device is offline (via "zpool offline"), we will inadvertently clear the DTL (dirty time log) of the offline device, even though it is still damaged. When the device comes back online, we will incompletely resilver it, thinking that the scrub repaired blocks written before the scrub was started. The incomplete resilver can lead to data loss if there is a subsequent failure of a different leaf device. The fix is to never clear the DTL of offline devices. Note that if a device is onlined while a scrub is in progress, the scrub will be restarted. The problem can be worked around by running "zpool scrub" after "zpool online". See also https://github.com/zfsonlinux/zfs/issues/5806 Reviewed by: George Wilson george.wilson@delphix.com Reviewed by: Brad Lewis <brad.lewis@delphix.com> Approved by: Richard Lowe <richlowe@richlowe.net> Author: Matthew Ahrens <mahrens@delphix.com>		2017-05-26 12:04:21 +00:00
..
common	MFV 316891	2017-04-21 19:53:52 +00:00
uts	MFV r318942: 8166 zpool scrub thinks it repaired offline device	2017-05-26 12:04:21 +00:00
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