| Column Name | Data Type | Description | 
| ARRAY_NAME | STRING | Array name. | 
| cache_size_kb | NUMBER | Cache Size (in KB). | 
| CREATION_DATE | DATE | The date and time the Isilon tier data was created in the Hitachi Storage Viewer database. | 
| is_usage_exact | CHAR | Whether the usage is an exact value, or an "at least" value. | 
| ISI_STORAGE_SYSTEM_ID | NUMBER | Storage system ID, for internal use by the Hitachi Storage Viewer database. | 
| ISI_zone_ID | NUMBER | Zone ID, for internal use by the Hitachi Storage Viewer database. | 
| LAST_UPDATED | DATE | The date and time the Isilon tier data was last updated in the Hitachi Storage Viewer database. | 
| nbr_of_files_dirs | NUMBER | The number of files and/or directories under the quota path. | 
| usage_with Overhead_kb | NUMBER | The used capacity, including filesystem overheads (in KB). | 
| usage_with_overhead_gb | NUMBER | The used capacity, including filesystem overheads (in GB). | 
| usage_without_overhead_gb | NUMBER | The used capacity, not including filesystem overheads (in GB). | 
| usage_without_overhead_kb | NUMBER | The used capacity, not including filesystem overheads (in KB). | 
| zone_id | NUMBER | Isilon-specified Zone ID. | 
| zone_NAME | STRING | Zone name. | 
| zone_path | STRING | Zone path. |