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New Sun code transforms x86 servers

New Sun code transforms x86 servers

Sun Microsystems is set to unveil Friday open source software that can repurpose any OpenSolaris-based x86 server into a block-based storage device capable of emulating the physical characteristics of a storage array.

Sun contributed the new code, dubbed Comstar, or common multiprotocol SCSI target, to its OpenSolaris.org open source community last month, noted Scott Tracy, director of storage platforms at Sun. He said that Comstar promises to cut enterprise storage management costs by allowing developers to quickly add new data transport protocols that can talk to various devices in a network.

Sun engineers began work on the Comstar project in 2007. The code can run on any server running the OpenSolaris operating system, but is only compatible with host bus adapters from storage networking providers QLogic Corp., Emulex Corp. and LSI Corp., Tracy said.

Comstar turns OpenSolaris servers into SCSI target storage devices that can be accessed by initiator hosts over a network. Initiator hosts supported by the software include Solaris, Microsoft Windows, Linux and VMware ESX.

According to Sun, the software simplifies the process of managing a SCSI target subsystem by creating independent modules that enable storage device types such as tape and disk drives to easily connect to transport protocols such as fiber channel, fiber channel over Ethernet, iSCSI, iSER and SAS.

The software also offers concurrent access to LUNs so users can create a singular storage management interface for the new storage devices. Developers can also use Comstar to simplify LUN masking and mapping functions, execute multiple parallel transfers via SCSI commands, and perform multipathing across various data transport protocols, added Scott.


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