Abstract: A computer network system includes a client-server architecture, where the client transmits SCSI commands over a network using TCP/IP to a server to request input and output operations for a physical storage device that is communicatively coupled to a storage device. The client perceives the storage device to be a local disk drive, even though the storage device is located on the target side of a network. The system includes a client-side disk-based cache.

Abstract: Storage domains respectively have associated configurable storage management properties that are separate from individual physical capabilities of physical storage resources available through a SAN. Logical volumes are created and allocated to hosts in the context of the storage domains. The presentation of such logical volumes to hosts accommodates storage resource access by hosts without requiring the hosts to be configured according to the requirements of the physical storage resources. Furthermore, allocation of logical volumes to hosts in the context of the storage domains entails provision of storage resources according to the respective storage management properties of the storage domains even though the logical volumes are created from physical storage resources in common.

Abstract: Storage domains respectively have associated configurable storage management properties that are separate from individual physical capabilities of physical storage resources available through a SAN. Logical volumes are created and allocated to hosts in the context of the storage domains. The presentation of such logical volumes to hosts accommodates storage resource access by hosts without requiring the hosts to be configured according to the requirements of the physical storage resources. Furthermore, allocation of logical volumes to hosts in the context of the storage domains entails provision of storage resources according to the respective storage management properties of the storage domains even though the logical volumes are created from physical storage resources in common.

Abstract: A Storage Domain architecture in which a pool of storage devices is controlled by one or a plurality of Storage Domain Servers (SDS) and create a single, compatible, enterprise wide, storage resource pool that appears to the system as a gigantic shared disk drive. These storage devices may be connected to the Storage Domain Server directly via SCSI enclosures attached to the server, across a private Fiber Channel (FC) network, and/or across a public SAN fabric via switches and hubs. The Storage Domain Server logically maps physical storage data on individual storage devices to logical storage data and presents to each host the storage resources allocated to that host by the storage administrator within the Storage Domain. Data stored in the system is available to all authorized hosts and protected against unauthorized access. Storage Domain Servers control all storage devices directly attached to them or scattered in the FC network, and present a consolidated view of that available storage to hosts.

Abstract: A computer network system includes a client-server architecture, where the client transmits SCSI commands over a network using TCP/IP to a server to request input and output operations for a physical storage device that is communicatively coupled to a storage device. The client perceives the storage device to be a local disk drive, even though the storage device is located on the target side of a network. The system includes a client-side disk-based cache.