Total Access Time
The access time test measures the total latency across all 18 tests. This is one of the more--if not most--important tests we run at this time for consumer SSDs. When your latency is low, your computer feels fast; it's just that simple.
SSDs make your system feel fast, but there is fast and then there is really fast. The M550 falls somewhere in the middle due to increased latency after heavy use. This is an issue that you can take care of quite easily with a little overprovisioning when installing the drive.
In the final test, we measure the amount of data written to the drive prior to the steady state test. The drive is under a constant random write load for 220 minutes. Overprovisioning helps quite a bit here as it allows the drive room to keep some flash clean and ready.
The M550 256GB is in the middle of the pack of products we've already ran the test on.
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