During a software update, a system that has volumes near 128 TB of used physical space
alerts you to take certain measures to prevent them from becoming read only.
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.
Note: Size limits for compressed volumes in data reduction
pools are not monitored.
Size limits
Compressed volumes have the following size limits. If a new or existing compressed volume
approaches the maximum size, the system issues an alert.
- 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, see the Flashes, alerts and bulletins website.