Monitoring size limits for compressed volumes

Compressed volumes near their size limits are monitored at specified thresholds to preserve data integrity. If a volume can be shrunk to fit below the recommended new limit, you are advised to do so. If volume capacity cannot be reduced to meet the recommended limit, you are advised to create a non-compressed mirror of the data (if one does not exist) and delete the primary copy.

Size limits

If you are using compressed volumes in standard pools, these volumes have the following size limits. If a new or existing compressed volume in a standard pool approaches the maximum size, the system issues an alert. Compressed volumes in data reduction pools do not monitor size of the volumes.

96 TB

Maximum virtual size of a new, individual compressed volume. You cannot create a new compressed volume that exceeds this size. In addition, you cannot increase the size of an existing compressed volume beyond this value. If one or more compressed volumes in a system exceed this limit, you receive an alert. To reduce the risk of losing or corrupting data, you must take action soon to remove data from the compressed volume.

120 TB

Maximum virtual size of an existing compressed volume in a system. If any compressed volumes in the system approach or exceed this value, the system issues an alert.

Important: Immediate action is required to remove all data from the compressed volume and prevent the loss of data.

128 TB

Maximum physical size of a compressed volume.

For information about how to move data off a compressed volume in a standard pool, refer to this Lenovo Information Center.