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Hybrid storage arrays vs. all-flash arrays: A little flash or a lot?
This article is part of the Storage magazine issue of January 2014 Vol. 12 No. 11
Now that solid-state storage prices have dropped, more vendors offer all-flash arrays; but are they really much better than hybrid storage arrays that mix flash with spinning disk? Comparing technology systems has traditionally relied on a "price-to-performance" analysis that tries to normalize system differences into an apples-to-apples comparison. With respect to storage, the advent of flash (solid-state) drives created a situation where IT buyers had to decide between price and performance. Flash storage offered blazing speeds, but at a very high cost per gigabyte ($/GB). At the other end of the spectrum, multi-terabyte hard disk drives (HDDs) are very economical, but with just around 75 raw IOPS per drive there better not be much work in the workload if that's where your data is located. HDDs have an advantage in $/GB, while flash has an advantage in $/IOPS. Hybrid arrays are intended to balance that equation. By adding a thin slice of flash storage to an array (i.e., 2% to 5% of total capacity), available IOPS may double ...
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Features in this issue
With solid-state prices dropping, more vendors offer all-flash arrays; but are they better than hybrid arrays that mix flash with spinning disk?
New data protection management tools can provide early warnings about gaps in the data protection process.
Our eighth Quality Awards survey on the best NAS storage systems had Dell besting the enterprise group and Hitachi topping the midrange.
Our latest survey finds respondents implementing deduplication and evaluating cloud backup services to deal with issues in their data backup process.
Columns in this issue
It's a new year and I'm newly optimistic again, hoping that 2014 brings a healthy dose of clarity and reality back to the data storage market.
Good-bye, or perhaps good riddance, to 2013, and welcome to a new year for the data storage industry.
A surprising number of firms suspect employees of using consumer online file-sharing services on work devices to store and share sensitive data.
Raw capacity numbers are becoming less useful as deduplication, compression and application-aware storage provide more value than sheer capacity.