SSD Performance Real World File Copy Tests

SSD Performance

In this round of benchmarks, we start off with our real-world file copy tests. Currently, certain controllers benefit from compressed files, while others don't. Certain storage units hate small files, others work well with them. So it only makes sense to do some manual tests on that.

File Copy

The most basic and simple test anyone can perform. We drop a 100 GB compressed file onto the SSD. That write number will fluctuate a bit here and there during the writing process. Let's have a peek:

You can see as long as the buffer(s) can keep up, 1.5~2.0 GB/sec sustained writes. However, after roughly 15 to 20 GB of writes, a TLC write hole kicks in. It's still 840 MB/sec though, almost twice the performance of a regular SATA3 SSD.

Copying the 100 GB file towards a Z440 (PCIe Gen4 NVMe SSD) we see writes averaging out 1.4 GB/sec.