New quick reference Link – Storage Standards

We have added more website content, including  a quick reference to standards used in the data storage industry, including SAN, NAS, DAS, FC, iSCSI, FCoE, and more! Complete with website links to all the common standards in use today.

Find it here, and under the Useful Links dropdown menu selection  We hope it is useful!

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Stormy Monday – More Cloud storage issues

Many companies are relying more and more on cloud services. While the cloud architecture can offer several benefits, increased reliability is not one of them, in our opinion. Today, another major storm has arisen in the cloud: It is notable, … Continue reading

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New Storage hardware unveiled at NAB shows “Promise” for Mac based Video Archiving

New Storage hardware unveiled at the just concluded NAB (National Association of Broadcasters) conference in Las Vegas shows real “Promise” for Mac based Video storage and archiving. Now, using a MacBook Pro as a professional quality video editing, storage, and archiving platform is becoming reality. Imagine having lots of Fibre Channel (or XSAN) based storage available on your laptop. See the news release here:
Promise Technology NAB news release
Many cost effective high performance video editing and archiving configurations become possible. Please Contact Us if you would like to discuss this further, or would like help designing a solution for your specific needs.

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Data Migration Methodologies

Data Migration Methodologies and Approach: Firstly, it is important to differentiate between data migration and other data management strategies such as backup, snapshotting, cloning, archiving, or Hierarchical Storage Management (HSM). Data migration is usually defined as the one-time movement of data between source systems and target systems. Once migrated, source data is not normally used, and is often deleted or archived. Data migration can be accomplished at several different levels. Levels of Data Migration can include:

  • Disk or volume level
  • LUN level
  • Filesystem Level
  • File Level
  • Disk Array controller or Appliance level
  • SAN or Network level
  • Application level

  Migration between filesystems, ZFS to/from VxFS, for example, can be complex, and requires a good understanding of the following:

  • Available migration tools.
  • Source and Target Filesystem type and version.
  • Source and Target data consumer Operating System (OS) type, version, and patch levels.
  • Application level data management impact, for example Oracle database considerations.
  • Performance, Availability, Security, and Reliability Impacts on Applications using filesystems during, and post migration.
  • Risk mitigation and problem recovery options.

  Commonly used migration tools range from the simple to quite complex, and may include:

  • Commercial Data Migration Software, including HSM or Backup based software, such as Veritas NetBackup Storage Migrator, CA Brightstor, EMC DiskExender. Array or Appliance Based Migration Tools. These are vendor specific, and are typically used for LUN level migration.
  • Application based utilities, for example Oracle's RMAN, ASM, DataPump export/import.
  • Filesystem based commands and utilities, such as dump and restore variants, for example vxdump, fscdsconv,  zfs snapshot send/receive.
  • Storage Pool migration commands and utilities, such as zfs zpool export / import. Volume Manager commands and utilities, such as VxVM deport / import. OS based commands/utilities, for example XXCOPY, sync, cp/dd/cpio, export/import.

Most of these tools are vendor, OS, or filesystem specific, and each will have specific hardware and software dependencies, as well as individual performance and availability implications. Deciding which data migration tool is most appropriate and formulation of a migration strategy and project plan is not a simple task. It requires foremost an understanding of the business and application requirements related to the end user data. In all but the simplest of environments, expertise and experience in data migration and knowing the pros and cons of the selected methodologies are vital for a successful data migration.

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What is your favorite office software suite? Ours include Open Office, which is a free, open source alternative to Microsoft Office for Windows, OSX, Linux, and Solaris. Read and write office files, and export to PDF. Several variants of OO are out there, which provide custom GUIs, and add other features as well.  Sun (now Oracle) offers StarOffice, from which the code base emerged. Try NeoOffice for Mac OSX, or Lotus Symphony for an IBM flavored environment. offers VBA macro support. There are many others as well, check them out here:  OpenOffice Links
Our favorite project management application is OpenProj, which works with Microsoft Project. Merlin for OSX can also import .mpp files. Thoughts, anyone?

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neat website:

“ is the premier destination for savvy advice, thought-provoking analysis and expert discussion on the intersection of technology, business and life. Covering decisions that reach from the boardroom to the living room, is the place to go for innovative insight and ideas that impact the world around you.”

– this description is from
Smart Planet

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Useful Links

We have added more website content, including  a  Useful Links dropdown menu selection for storage related hardware and software vendors, storage focused publications, and blogs. Enjoy!

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Why does this blog exist?

Why does this blog exist?

This blog will contain  the writings, compositions, discussions, discourses, musings, and, yes, the rantings, of  Green Oak Systems staff and guests. Please feel free to contribute, but we do request you observe some common sense Posting Rules:

  • No Spam.
  • No Insults or extreme profanity. Constructive criticism is welcome.
  • No  Advertising, although positive product/service reviews are  welcome.
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“Unified Memory Device”

Came across an interesting new memory technology under development. Could this mean faster starting, lower power servers in the near future?

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Website Changes

We have completely redesigned our website. Let us know what you think!

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