John Meneghini
33 Timbercreek Lane
Billerica MA 01821

johnm@nobletec.com

Phone: (978) 670-1315

Summary

Over twenty years of computer industry experience developing real-time embedded systems, operating systems, device driver, utilities and diagnostics. Various systems administration, product management, and customer service skills. Extensive experience with Data ONTAP, Solaris, Tru64 Unix and Open VMS. Extensive experience with high availability I/O subsystems and clusters, RDMA, VIA, Ethernet, SCSI and Fibre channel. Proficient with C, Perl, 68k assembly and MACRO-32.

Experience

Recently moved to the OS Kernel group. Current projects include:

• re-write Data ONTAP kernel scheduler
• develop new memory management APIs
• consolidate Data ONTAP system services with FreeBSD

Team leader for a group of four engineers responsible for developing and maintainting the Data ONTAP 7G SCSI Target software stack. Managaged projects; wrote code; designed new features; interfaced with customers and product management. Responsible for all SCSI protocol related issues and technical decisions as the technical owner of the revenue producing product. Developed code with gcc cross compiler for Intel, AMD-64, and MIPs architectures.

Developed early version of SAN xCopy Offload and Write Same Hole Punching features needed to integrate support for our product with Vmware's ESX operating system. This development involved changes in both ESX and Data ONTAP. The Write Same Hole Punching code was delivered in September 2008. The xCopy code was delivered in January 2009. This functionality was demonstraited at VMworld Euorpe 2009.

• Worked on SCSI Thin Provisioning and Write Same Hole Punching proposals
• Re-designed and developed the Data ONTAP 7.3 Asymmetric Logical Unit Access (ALUA) protocol implementation.
• Implemented and maintained the NetApp SCSI Target Protocol Specification.
• Designed and implemented the Data ONTAP 7.2 SAN Thin Provisioning feature
• Oversaw SAM-3, FCP-3, SPC-3, and SBC-2 SCSI Protocol compliance effort
• Re-wrote major portions of the Data ONTAP 7.3 SCSI Target protocol stack.

Developed Data ONTAP 7G Fibre channel device drivers and platform support code. Worked extensively with PCI-Express, Fibre Channel, SCSI, Qlogic, and Finisar equipment. Developed and debugged code with gcc/gdb cross compiler for Intel, AMD-64, and MIPs architecture.

• Sustained Qlogic ISP2312 (2Gb) Target mode device drivers
• Added support for FCP Target mode operation to the FAS200, FAS3000 and FAS6000 platforms.
• Added support for Qlogic ISP2322/QLA2342 to Data ONTAP 7.1
• Developed new PCI Express Qlogic ISP2432/QLE2462 (4Gb) Target mode Fibre channel device driver.
• Participated in the 2005 UNH IOL 4Gb FCP Plugfest
• First to market with 4Gb FCP Target mode storage array.
• Patent 7406509 - Dynamic switching of a communication port in a storage system between target and initiator modes
• Application 20060248047 - System and method for proxying data access commands in a storage system cluster

Supported systems integration and QA efforts with the company's new FCP and iSCSI product features; developed host attach kits in C; wrote tools, tests and utilities in Perl. This enabled NetApp's new SAN based products to interoperate with Solaris, AIX, HPUX, Veritas and other initiator stacks. Gained extensive experience with various and MPIO stacks and with Veritas Clusters.

• Developed the Veritas Array Support Library for NetApp Block Filers on Solaris (Workshop C, pkgadd)
• Developed the Veritas Cluster Agent for NFS Mount on Solaris (Perl, pkgadd).
• Developed the san lun utility for Solaris (C, pkgadd)
• Designed and developed multiple Perl packages and test scripts for QA

Developed VI Architecture based Solaris DAFS products and technologies. Aquired extensive experience with Solaris 5.8 internals, VIPL, KVIPL, DAFS, and RDMA. Developed a driver cache which took advantage of the Sun IOMMU to optimize TPT memory registration with our vendor's VI Architecture HBAs.

• Developed Kernel VIPL interface consisting of two Solaris kernel loadable modules for two vendors (Troika and Emulex).
• Developed a Solaris block device driver for the company's DAFS Driect Attach product.
• Supported the company's Performance Group in their TPCC over DAFS benchmark effort (full disclosure report can be found here ).

Working for Orca Systems, I developed a Solaris VI Architecture device driver an Provider Library (VIPL) for the Giganet cLAN ( gcc). 1000 host bus adapter. Although subcontracted, I work closely with other engineers both inside of Orca and at Giganet, Orca's client.

• Developed a Solaris VI / DLPI combo driver.
  • Ported character mode driver and VIPL from Linux to Solaris 2.7.
  • Developed SMP and Solaris 64 Bit kernel support.
  • Conducted and controlled all Multi-node testing.
  • Developed Kernel VIPL interface.
  • Integrated VI character driver with native Streams / DLPI driver.
• Sustained all kernel and user library components through to product release.
• Represented Orca at Giganet client site.

Worked for Compaq's Tru64 Unix TruClusters group on the the design and implementation of their first Fibre channel based AlphaServer clusters product: TruClusters Version 1.6 (TCR 1.6). While working in this capacity I gained experience with switched Fibre channel and with devices such as Compaq's RA8000/ESA12000 storage controllers and Brocade's SilkWorm switch.

• Developed support for Multi-initiator access to the RA8000/ESA12000 (and other) storage arrays.
  • Implemented CAM device driver support for SCSI-3 Persistent Reservations
  • Designed and implemented IO Barrier mechansim in TCR 1.6 Distributed Raw Device (DRD) and Connection Manager (CNX) kernel components.
  • Conducted and controlled all Multi-initiator testing
• Sustained CAM, DRD and CNX kernel components through to product release.
• Represented Compaq at NCITS T10 SCSI working group meetings

Working for Orca Systems, a small but growing consulting company, I ported and developed Unix device drivers for Fibre channel related products and devices. Orca is a member of the ANSI X3T11 Fibre channel committee with many prestigious clients in the industry like Sun, Emulex and Clariion. While working for Orca I gained significant experience with Solaris and AIX, and with technologies such as IEEE-1275 Open Firmware, PCI, Fibre channel and FCP.

• Developed a ESCON device driver for the GSN Link 9000 ESCON channel HBA
  • Ported a Sun Solaris 2.5 DLPI/Streams driver to IBM AIX 4.2 .
  • Implemented AIX character mode driver supporting adpater initialization & diagnostices.
• Developed a IP/FCP combo driver for the Emulex LightPulse 6000 Fibre channel HBA
  • Ported an IBM AIX driver to Sun Solaris (both Solaris SPARC & Solaris X86).
    • Implemented a SCSA compliant FCP HBA driver
    • Implemented a Streams/DLPI LAN driver
  • Sustained development through qualification and release with the Sun Ultra 30.
  • Sustained development through qualification and release with the Clariion FC5000 Series Raid array.
  • Sustained development through qualification and release of Clariion's ATF 1.2.7 Target driver.
• Developed and maintained test scripts for IP and FCP qualification.
• Interfaced with and supported company's major clients: Emulex, Clariion, General Signal Networks.

Worked for the Digital Unix Hardware Support Group I was responsible for Base operating systems support for the company's TruClusters high availability file server products: Production Server and Available Server (ASE). While working as an integral part of the TruClusters and Hardware Support design teams I gained extensive experience with SMP, multi-initiator SCSI, CAM and proprietary protocols like N-Port and SIM-port.

• Developed and maintained CAM device drivers for three releases of the TruClusters ASE product.
• Implemented SCSI Target mode support for the KDMSA Host Bus Adapter.
• Implemented support for ASE Shared Tape (multi-initiator SCSI tape).
• Sustained several CAM SIM & Peripheral device drivers,
• Worked on several networking drivers (including their Tulip driver).
• Designed PCMCIA NE-2000 compatible network driver.

Provided SCSI and I/O sub-systems expertise on a part time consulting basis. Sustained the company's FlashDAT and FlashDLT tape products; gaining experience with Intel 8088 microprocessors; AMS86 assembler and in-circuit emulator; and tape compression technology.

• Ported the existing DAT product to a DLT tape device.
• Implemented several bug fixes.

Worked for GenRad's Runtime Systems group developing a proprietary Runtime systems library for the company's MCATES ATE product. Both the development and target platforms where Unix systems (running SUN Solaris). Gained experience with Saber C, RCS & GNU compilers and development tools; and the company's proprietary ATE technology as well as their code inspection process.

March 1992 to January 1993	Contract Software Engineer
Digital Equipment Corp.	VMS & Mass Storage Engineering

Working for both the Mass Storage and VMS Engineering groups: developed an object oriented Raid utility in ANSI Standard C, implemented VMS support for the HSZ50 (a RAID controller product) and maintained VAX/VMS Class & Port SCSI drivers, Experience with MACRO-32, SDA, XDELTA, VAX/VMS internals and VMS development tools; NCR SCSI \& RAID controllers; SCSI-2 tagged queuing; Object Oriented C design, Cursers, and SRV5 R4.

• Ported a host based object oriented RAID utility from AT&T SRV5.4 to VMS.
• Implemented Class driver support for the TLZ06 DAT.
• Maintained KZQSA PKI & PKS Port drivers.
• Sustained VAX/VMS SCSI Class drivers.

August 1988 to March 1992	Firmware Engineer
Clearpoint Research Corp.	Product Engineering

Worked for Clearpoint's I/O Subsystems Product and Custom Engineering groups developing real-time embedded systems software for 68010/20 based host bus adapters and proprietary test equipment. Utilized several different development platforms, cross-compilers, in-circuit emulators and logic analyzers. Gained extensive experience with Motorola 680xx microprocessors, NCR SCSI controllers, SCSI disk and tape devices, and proprietary ASICs. Worked as integral part of board and product level design teams. Acted as systems administrator for group's Digital Ultrix and VAX/VMS workstations and servers.

• Designed and implemented proprietary hybrid SCSI VAXcluster product:
  • Developed all firmware needed for SCSI multiple initiator support.
• Developed VAX BI/SCSI disk & tape host bus adapters:
  • Developed Real Time embedded multi-tasking OS, including system services and an on board diagnostic interface.
  • Reverse engineered Digital KLESI-B tape host adapter and implemented an embedded TMSCP driver.
  • Developed an embedded SCSI-2 driver, including tagged queuing & multiple initiator support.
  • Responsible as maintainer of all tape adapter firmware.
• Developed proprietary VAX BI subsystems tester:
  • Ported a proprietary single-board computer (68010) to the BI bus.
  • Developed firmware enabling board to emulate a VAX including:
    • BIIC initialization, operation, and control
    • 68010 exception handler
    • Callable MSCP driver
• Developed VAX 3100 memory tester:
  • Wrote 68010 based on-board self-test, interrupt service routines, and diagnostics suite.
  • Implemented firmware for proprietary host bus adapter.
  • Developed proprietary micro-code assembler.

August 1986 to August 1988	Operations Analyst
Digital Equipment Corp.	Corporate DIS, Technical Support

Working for the Digital Information Systems group as a part of the Site IS Technical Support Group; designed and implemented large information systems; resolved complex technical problems; developed software tools and utilities; and supported other groups. Extensive experience with VAXclusters and LANs; performed VAX/VMS systems management, performance analysis, and planning; DECnet, LAT, MTS, DCL, NCP, ALL-IN-1, and VTX. Developed utilities in MACRO-32, Pascal, DCL, and C. Extensive experience with VMS 4.4 thru 5.5.

• Implemented the LAVc display seen at DECworld France 1988.
• Maintained the VTX infoserver seen in the DECworld 1988 VIDEOtext display.
• Managed project VAXcluster seen in the IDECUS 1986 VRO project display.
• Designed and implemented site's 10 node, 250 concurrent user VAXcluster.
• Designed and implemented numerous Local Area VAXclusters.
• VSO (VIDEOtext Systems Operator).
• ALL-IN-1 systems manager.

July 1984 to August 1986	Field Service Engineer
Digital Equipment Corp.	IN-DEC Field Service

Worked for the company's award-winning Maynard Field Service branch as an Account Representative and a top performing Engineer. Supported the company's engineering community working on small LANs, MicroVAXes and word processing systems.

• Acted as the systems manger for branch MicroVAX.
• Implemented a bootable MicroVAX diagnostics procedure.
• Consistently performed in top five percentile.

Education

Boston University	(incomplete) BS Computer Science.
GTE Sylvania Technical School	1984, Electronics phase 1.
Minuteman Technical Vocational ROP	1983, Electronics Test Tech.
Digital Training	Numerous hardware and software courses.

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