Clearpath’s Blog on IT Infrastructure, Hybrid Clouds and IT Security

As drive sizes in storage arrays increase, should we keep putting eggs into larger baskets?

Posted by Ted Evans on Mon, Nov 07, 2011 @ 12:03 PM

Hard drive sizes have increased again.  It is just part of the evolution of technology.  When it comes to using them in storage arrays however, bigger is not always better – or at least may not be the best course of action.

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Topics: Data Storage

How to Get the Most Out of a Data Domain DD630 Upgrade

Posted by Ted Evans on Tue, Apr 19, 2011 @ 04:00 PM

Many of our customers initially purchased single-shelf Data Domain DD630 appliances with 7 drives, with the intent to upgrade them later to 12 drives when additional capacity was required. Once the drive upgrade has been ordered and shipped, the default process to utilize the additional capacity is pretty straightforward. The only problem with the default capacity upgrade method is that 2TB of additional space is sacrificed to parity. In essence you would be adding only the capacity of 3 drives out of the 5 you purchased. Unlike a Clariion or a VNX, the Data Domain does not have the ability to expand its disk group. Instead, it creates a second RAID 6 disk group and just extends the overlying file system. Again, the downside here is that an additional 2 drives are being allocated to parity when a second disk group is created.

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Topics: Data Storage

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