If the Storage Snapshot Autodelete option is enabled, the LUN is contained in a FlexVol volume that has overwrite reserve set to less than 100 percent and that also has the Data ONTAP automatic Snapshot copy deletion feature enabled and configured to trigger when the overwrite reserve is nearly full. If Exchange data or SnapManager SnapInfo directories are stored on LUNs contained in a volume with these characteristics, the Data ONTAP Snapshot copy automatic deletion policy might delete Exchange backup set components.
The following columns display SnapManager configuration information:
- Drive Letter or Mountpoint
- A SnapManager configuration setting. The drive letter or NTFS mountpoint on which the LUN is mounted.
- Backup Autodelete Trigger (percentage)
- A SnapManager fractional space reservation policy setting. The percentage of overwrite reserve utilization that triggers automatic deletion of Exchange backup sets for the volume that contains the LUN.
- Disable Database Trigger (percentage)
- A SnapManager fractional space reservation policy setting. The percentage of overwrite reserve utilization that triggers automatic disabling of Exchange databases for the volume that contains the LUN.
The following columns display the fractional overwrite reserve settings and status:
- Fractional Reserve (percentage)
- The amount of space reserved for overwrites on the volume that contains this LUN, expressed as a percentage of the total size of all space-reserved LUNs in the volume
- Used Reserve (percentage)
- For the volume that contains this LUN, the amount of overwrite reserve in use, expressed in two ways: as a percentage of the total size of all space-reserved LUNs in the volume, and in megabytes
- Available Reserve (MB)
- For the volume that contains this LUN, the amount of overwrite reserve available
- Snapshot Autodelete
- For the volume that contains this LUN, the state of the Data ONTAP Snapshot copy automatic deletion feature: enabled or disabled
If this LUN stores Exchange data files and is contained in a volume for which the Data ONTAP Snapshot copy automatic deletion feature is enabled, disable this feature on that volume or ensure that it is configured so that it does not delete SnapManager backup set components.
Note: The SnapManager fractional space reservation policy triggers are not applicable to fully space-reserved LUNs. If Fractional Overwrite Reserve (percentage) is 100, the LUN is contained in a fully space-reserved volume rather than a fractionally space-reserved volume.
