Managing an enterprise data storage system

A method to manage an enterprise data storage system, the method comprising:

• dividing storage disks of the enterprise data storage system into multiple virtual storage subsystems, wherein each virtual storage subsystem hosts a non-overlapping subset of the storage disks of the enterprise data storage system, wherein each virtual storage subsystem includes a level-2 cache memory dedicated thereto, and wherein the level-2 cache memory includes multiple hardware components;
• establishing a communication path between the level-2 cache memory dedicated to each virtual storage subsystem and a main cache of the enterprise data storage system;
• maintaining a copy of transaction data from the non-overlapping subset of the storage disks hosted by each virtual storage subsystem in the level-2 cache memory dedicated thereto such that when the main cache searches for the copy of transaction data, the main cache fetches, over the communication path, the copy of transaction data from the level-2 cache memory of the virtual storage subsystem;
• and
• when a level-2 cache memory dedicated to a first virtual storage subsystem fails, joining the storage disks of the first virtual storage subsystem with a second virtual storage subsystem such that the storage disks of the first virtual storage subsystem can utilize a level-2 cache memory dedicated to the second virtual storage subsystem.