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Storage device becomes permanently lost while SCSI reservation is held by ESXi (2009302)
Device :device has been removed or is permanently inaccessible while holding a reservation.
The message indicates that the permanent device loss occurred while the device was reserved for exclusive use by the ESXi host.
ImpactWhen a permanent device loss occurs during a datastore operation that requires a SCSI reservation, the operation fails and the datastore becomes unavailable. ESXi marks the device as not connected and a warning about the device being permanently unavailable appears in the VMkernel log file.
Before unmounting the datastore from ESXi, break the device lock by running the following command:
vmkfstools -B --breaklock device_path
For more information, see Knowledge Base article 2004684.
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