Sustained write speeds can suffer tremendously once the workload spills outside of the cache and into the "native" TLC or QLC flash. Most SSDs implement a write cache, which is a fast area of (usually) pseudo-SLC programmed flash that absorbs incoming data. Official write specifications are only part of the performance picture. Sustained Write Performance and Cache Recovery Crystal Disk Mark’s results, on the other hand, show the new P2 delivers slower sequential performance with incompressible data, which more closely aligns with the data most people store on their PC.Īdditionally, the QLC-powered P2’s random performance at a queue depth of 1 (QD1) remains close to the TLC variant, but the QLC model severely lags at higher queue depths, delivering one-third to half the speed. Based on the ATTO benchmark alone, it looks like the P2 should perform better than its predecessor, but unfortunately, this didn’t carry over into other tests because ATTO tests with fully compressible data, which is mostly unrealistic.
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