Tag Archives: SCSI

Mentor Graphics Delivers Simulation and Emulation Solutions to Verify Serial Attached SCSI Products

By Business Wirevia The Motley Fool

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Mentor Graphics Delivers Simulation and Emulation Solutions to Verify Serial Attached SCSI Products

WILSONVILLE, Ore.–(BUSINESS WIRE)– Mentor Graphics Corp. (NAS: MENT) , a leader in advanced system verification solutions, today announced hardware and software solutions to accelerate the verification of Serial Attached SCSI (SAS) second-generation (Gen2) products, having speeds up to 6Gbps. Using the Mentor® verification solutions, designers can test their SAS Gen2 devices integrated on their System-on-Chip (SoC) designs, and develop and test their software drivers and applications prior to silicon being available.

The first new product is iSolveTM SAS, which has a ‘plug-and-play’ hardware interface to the Veloce® family of hardware emulators. It provides a cost-effective and efficient solution to verify new SAS Gen2 target devices with their software drivers in a SoC design. Additionally, an emulated SoC containing a SAS initiator device, such as Host Bus Adapter, can be connected via the iSolve SAS solution to a full-speed SAS disk drive for testing with real target hardware. The Gen2 solution is also fully compatible with older Gen1 speed devices. This new hardware product adds to the existing iSolve family of solutions for the accelerated verification of applications such as storage, networking, embedded systems, wireless, and multimedia devices.

Complementing the iSolve solution is the SAS transaction-based verification IP (VIP) solution. This delivers both a simulation environment, using the Questa® verification platform, and accelerated simulation environment using the Veloce hardware for the verification of SAS Gen2-compliant devices. It generates the appropriate stimuli for the Design-Under-Test (DUT), passing packets, or transactions, of protocol data for tests. The VIP solution also provides a high-level Application Programming Interface (API) to allow use with multiple test-bench environments, such as SystemVerilog and SystemC, and provides example test environments that can exercise the emulated SAS Gen2 device. The Gen2 SAS VIP is also fully compatible with Gen1 speed devices.

Increased bandwidth and performance requirements of enterprise systems, especially those involving video streaming or high levels of transactional-data, such as reservation or billing systems, have meant that SAS has become an industry standard in the storage application space. Additionally, its backward compatibility with SCSI, and interoperability with Serial ATA (SATA), delivers flexibility and cost savings to enterprises previously not available using their traditional storage environments.

“The growth in SAS products has been increasing rapidly, and is especially important to those in sectors where large data-intensive storage is mandatory for the operation of applications,” said Eric Selosse, vice president and general manager, Mentor Emulation Division. “The challenges faced by the creators of such …read more

Source: FULL ARTICLE at DailyFinance

Using ZFS with Veritas Cluster Server

By cambridge

Until I really began to explore the practical implications of using ZFS with VCS, I would not have necessarily realised the obstacles that would be put in my path. Data integrity is a must-have for storage in a shared host environment, so it surprised me to learn as I opened this particular Pandora’s box that VCS provides no solution at all for ensuring data integrity on any of the ZFS pools that are a part of your cluster. The ‘Zpool’ agent is dumb. It imports the pool. It exports the pool. “What about SCSI-3 persistent reservations?”, I hear you ask. What about them, indeed. ZFS is a competing product, I won’t expect an answer to that problem coming from the Symantec camp. So I took up the gauntlet on a mission to add SCSI-3 PR support to the Zpool agent for my client. I succeeded. So I have written up some notes that might help direct others should they stumble across the same obstacles, and along the way I’ve discovered the benefits that Solaris MPxIO has to offer that are superior to VxDMP.

Technical Prose: SCSI-3 PR with ZFS on Veritas Cluster Server

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Source: FULL ARTICLE at The UNIX and Linux Forums