This statement is not valid regarding the OCI Block Volume service. You cannot decrease the size of a block volume once it is created. You can only increase the size of a block volume, either by creating a new, larger volume from a backup or a clone of the original volume, or by expanding an existing block volume in place with online resizing12 The other statements are valid regarding the OCI Block Volume service. You can expand an existing block volume in place with online resizing, which allows you to increase the size and performance of a block volume without detaching it from an instance or interrupting I/O operations. You can also clone an existing block volume to a new, larger volume, which creates an exact point-in-time copy of the source volume and preserves all the data and properties of the source volume, except for the size and performance. You can also increase the size of a block volume by creating a new, larger volume from a backup of the original volume, which restores all the data from the backup to a new volume with a different size and performance12