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Top three mistakes when switching from HDD to SSD

Marc Staimer outlines the top three mistakes users make when switching from HDDs to SSDs in this Expert Answer.

What are the top three mistakes people make when switching data from HDD to SSD storage?

First, many people think SSDs are free from data corruption. They're misinformed. SSDs are just as likely as HDDs to suffer from data corruption. However, the process in which it occurs in SSDs is different. HDDs can suffer from a whole host of magnetic anomalies that can cause corruption, while SSD's suffer from electron leakage. Over time, a flash memory chip's floating gates (transistors in the SSD's cells capable of holding an electrical charge) can leak electrons. This may cause the cell's state to change from 0 to 1 or vice versa and results in corruption.

Second, there is a perception that SSDs do not require battery backup because they are nonvolatile storage. Again, that is an error. Yes, the storage is nonvolatile; however, recent testing has shown that when unexpected power loss occurs with SSDs, there is a high probability of corruption. All SSD storage should be tested for unexpected power loss and, if corruption occurs during testing, use battery backup so that they can be brought down in an orderly fashion.

And lastly, many users make the mistake of not buying enough capacity or utilizing data reduction software such as thin provisioning, deduplication or compression.

This was first published in May 2013

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