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I have recently bought an MSATA SSD as well as an adapter case that fits into my laptop 2.5" SATA bay.

I have connected it in two configurations: - first through the adapter to the 2.5" SATA slot - then without the adapter to the native MSATA slot

In the second configuration there are no problems: the are no bad blocks, the SMART capability is working, and the read/write performances of the SSD are as advertised.

In the first configuration, badblocks found $1.5^6$ bad blocks, the SMART capability is not detected by the OS (Linux) and the read/write performances are slightly worse on average, but with an incredible scatter. Access times (which should be <0.1 ms normally) hop randomly between 1.6 and 0.1 ms.

My question is whether this behaviour is to be expected from the kind of adapter used, or if the particular item I have is defective.

astabada
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2 Answers2

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I am you and have recently bought two new adapters, one from a Chinese supplier through ebay, and one adapter from Startech. I repeated the tests, with the following results.

On the Chinese adapter, the results were the same as with the previous adapter, in particular: - SMART unavailable - bad blocks detected - worse read/write performance (including worse access time) This strongly supports the idea that there is a design flaw rather than a defect in the two adapters.

The Startech adapter worked as expected: - SMART available - no bad blocks - read/write performance statistically equal to the nominal one.

Therefore there is no reason why these adapters should degrade performance, as MonkeyZeus suggested.

astabada
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@astabada, why bother? The adapter is about $20. I was thinking of doing something on the cheap, but with the adapter, why not just buy a sata ssd? It defeats the purpose for probably most use cases.

Kevin Guerra
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