Commits on May 15, 2023

1. Probe vdevs before marking removed …

   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.
   
   1) 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.
   
   2) 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.
   
   Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>

   

   behlendorf committed May 15, 2023
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