StarWind Software

Is there a set percent of the L2 cache that is dedicated to read cache vs write buffer in StarWind? For instance I think VMware vSAN's cache drives are dedicated 70% to read cache and 30% to write buffer.

L2 cache is used for hosting read operations. It operates on write-through mode and this cannot boost writes.

Thanks. Does L1 cache contribute to write buffering? If so how much of L1 cache is write buffer vs read cache?

L1 cache is completely dedicated to boosting write operations. While the data is still cached, it can be read from L1 cache directly with no need to address the storage.