[2.1.12] Probe vdevs before marking removed #14897
Merged
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Motivation and Context
Backport of #14861.
Description
Before allowing the ZED to mark a vdev as REMOVED due to a hotplug event confirm that it is non-responsive with probe. Any device which can be successfully probed should be left ONLINE to prevent a healthy pool from being incorrectly SUSPENDED. This may occur for at least the following two scenarios.
Drive expansion (zpool online -e) in VMware environments.
If, during the partition resize operation, a partition is
removed and re-created then udev will send a removed event.
Re-scanning the namespaces of an NVMe device (nvme ns-rescan)
may result in a udev remove and add event being delivered.
Finally, update the ZED to only kick in a spare when the removal was successful.