Inside System Storage -- by Tony Pearson

Tony Pearson Tony Pearson is a Master Inventor and Senior IT Specialist for the IBM System Storage product line at the IBM Executive Briefing Center in Tucson Arizona, and featured contributor to IBM's developerWorks. In 2011, Tony celebrated his 25th year anniversary with IBM Storage on the same day as the IBM's Centennial. He is author of the Inside System Storage series of books. This blog is for the open exchange of ideas relating to storage and storage networking hardware, software and services. You can also follow him on Twitter @az990tony.
(Short URL for this blog: ibm.co/Pearson )
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1 localhost commented Trackback

You may not be the right person to ask but I am asking everyone so "How do you see hybrid disk drives?"?<div>&nbsp;</div> Hybrid disk drives?For everything.<div>&nbsp;</div> IMHO, RAID has a short life left unless rebuild time can be dramatically shortened and be made seamless, transparent and invisible.<div>&nbsp;</div> How about hybrid disk drives so the rebuild takes advantage of the SSD (flash or other) component?<div>&nbsp;</div> What would the controllers need to look like to support these hybrid drives and the SSD rebuild function? Actually I believe controllers are on the way out. We just don't have a replacement yet.<div>&nbsp;</div> IMHO again, the alternative is the JBOD disk shelf and parallel paths to the shelf so the "write-many" action can take place. If I have n+2, total of 3, geographically dispersed copies of a Unit of Information I can be very confident of finding that Information without any rebuilds. RAID gives me two copies and a rebuild process. The dispersed JBOD would automatically create a new copy,geographically dispersed, if a copy became unavailable. Thus maintaining the n+2 status.<div>&nbsp;</div> The controllers would need to be very smart in both cases. The "big-brained" people I have proposed this to don't want that much intelligence in the controller.<div>&nbsp;</div> I've seen some products that seem to be headed this way without the hybrid SSD disk. At the Enterprise the JBOD disk shelf and parallel write-many would seem to dominate. The SMB market might prefer the hybrid SSD disk.<div>&nbsp;</div> If these drives were hybrid they would be perfect for the no RAID, no controller Storage.

2 localhost commented Trackback

Tony, many thanks for the dimensions and associated details. I will write them down for future reference! On the subject of hybrid drives, I think they will prove useful where the controller does the work. But I will comment on that later...

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