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Hu's Blog

Archive for May, 2011

A question was recently raised as to how we ensure data integrity with SATA drives, which are limited to a 512 sector size and cannot support the additional 8 check bytes that SCSI FC, iSCSI, and SAS drives use to provide this assurance.

I seemed to have touched a nerve with Barry Burke in my last post on tiered storage myths, where I talked about the advantages of tiering across internal and external tiers of storage. Since EMC is not able to provide this capability Barry went on a long rant on why he thinks Hitachi Data Systems [...]

When Storage Area Networks were being introduced over 10 years ago, Hitachi recognized that a new storage architecture would be required to support the networking and scalability requirements of this new technology. So Hitachi introduced an internal switch architecture with our Lightning 9900 family of enterprise storage products to meet these new demands. Hitachi also [...]

The tiering of storage is a valuable tool for reducing costs and improving efficiencies in many ways. There are different levels of tiering, as I mentioned in my previous post, and the value that we derive from tiering can vary depending on the different types of tiering.  There are also several myths about tiering of [...]

Green IT initiatives can accelerate, and even pay for data center transformation. That is the thesis of my speaking session proposal currently under consideration for VMworld this year. The public voting process to decide the sessions that will make it to the final agenda of the conference, which takes place August 29 – September 1 [...]

In a recent post I described the different forms of tiering. Today I’d like to discuss another form of tiering that is used in the mainframe: Hierarchical Storage Management or HSM. This is a licensed product that was originally called DFHSM and later renamed DFSMShsm when it was integrated with DFSMS.

In the first quarter of this year, the Financial Sector Technology Group held an award event in London where IT groups from all major financial institutions came together to recognize the best practices and achievements in IT over the past year.

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Hu Yoshida
Vice President and Chief Technology Officer

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