IOmeter testing

[johnw]

That red 64KB curve shows how bad Sandforce is at compressing data. Anvil found that "Compressing a 1GB testfile using 7z (normal) results in a ~1.73MB file", which is an incredible 578x compression factor. And yet Sandforce evidently could not compress it at all, since it took about a 50% performance hit compared to the blue curve.

My guess is that a lot of data on most people's SSD will be similarly hard for Sandforce to compress.

[Anvil]

That red 64KB curve shows how bad Sandforce is at compressing data. Anvil found that "Compressing a 1GB testfile using 7z (normal) results in a ~1.73MB file", which is an incredible 578x compression factor.

I've been doing some more tests using the pseudo random data generator and it seems there is more to it.
The compression factor varies, the generator is not suitable for testing/comparing SF based drives.

Using the pseudo random generator the compressed size of the file has so far produced 1.73MB up to 64MB 7z files. (still using normal compression)

Repeating bytes and Full random looks like the only options that makes sense for testing SF based drives.