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Solid State Drive Reliability and Performance in Storage Networking

Feb 16, 2010, 16:03 (1 Talkback[s])
(Other stories by Henry Newman)

[ Thanks to Paul Shread for this link. ]

"Planning for solid state drive (SSD) hardware is a complex task that requires a good understanding of how SSDs are going to be used within your storage networking environment, so it is best to start with the first part of this series to understand application and software issues (see Solid State Drives in Enterprise Applications).

"This second article will deal with SSD hardware issues, and the third and final installment will address some important SSD design issues, along with SAS and RAID controller issues.

"There are two basic types of interfaces for SSD hardware: PCIe and Fibre Channel/SAS/SATA. Each of these types of interfaces has strengths and weaknesses, and these tradeoffs are important to understand.

"Another issue is solid state drive management. The question is whether SSDs should be placed in RAID controllers, or whether they should be connected via another interface. Of course, SSD performance is a big issue, or you wouldn't even be considering purchasing them. We have all heard about wear leveling, write performance degradation and other performance issues found in some flash-based SSDs. There has been a great deal written on these topics, so I am just going to cover some important details to understand. And last but not least is the question of SSD reliability. As always, let's start with reliability, as few things matter more to enterprise data storage users."

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