In the event that the system detects a problem with the auto‑tier address location, the system sends a Volumes Have Lost Mappings system alert. Lost mappings is a condition in which data on the auto‑tiered LUNs might not be accessible or available. The integrity check on the Storage Domain begins immediately after the discovery of the lost mappings. This check cannot be cancelled by the administrator. The integrity check can take several minutes to several hours to complete. The actual time depends on the number of LUNs and the amount of data that the system checks.
During the integrity check, the system verifies that the locations to the auto‑tier data is correctly reported. If the Storage Domain has the Tier Reallocation option disabled, then the integrity check does not apply.
After a restart operation resulting from the system not shutting down cleanly.
After a Controller failover.
After a warmstart, if the administrator does not respond to a Lost Data system alert.
After a warmstart, if the system did not complete its data mappings or data migrations.
After detecting a media error on a metadata volume. The media error can also result in Volumes Have Lost Mappings but the system does not wait for your response before proceeding with the integrity check.
You can initiate an integrity check on the Storage Domain at any time, or as instructed by Oracle Customer Support. If you initiate the integrity check while the system is already performing the check, the system ignores your request.