Patent ID: 9218407
Filing Date: 2015-12-22
Classification: G06F

Abstract:
1. A system comprising: a first storage system comprising a storage controller and one or more storage devices; and a second storage system comprising a storage controller and one or more storage devices; wherein the first storage system is configured to: receive a first portion of a medium from the second storage system during replication of first data, wherein the first data is a volume, wherein the first portion of the medium underlies the first data, and wherein a second portion of the medium does not underlie the first data; expose the first data to one or more user operations while the medium is in an intermediate read-write state responsive to receiving the first data in its entirety and prior to receiving the second portion of the medium; take a snapshot of the volume while the medium is in the intermediate read-write state, wherein the medium remains in the intermediate read-write state after the snapshot is taken of the volume; create a new anchor medium for the volume responsive to taking the snapshot of the volume; map the new anchor medium to a previous anchor medium of the volume responsive to taking the snapshot of the volume; and convert the previous anchor medium to a read-only state responsive to taking the snapshot of the volume.