Hi, colleagues, I need your advice.

We're planning to move WAL logs from HDDs to separate SSDs.
We have a question: is there a big difference between using SATA-III or SAS SSDs?
SAS is 24GB/s
SATA-III 6GB/s

Our HDDs are Seagate SAS 10Tb Enterprise Capacity Exos 7E10 12Gb/s 256MB.
SAS drives vary greatly in price.
Will SATA drives be useful for cache?

Ihr Miss understand something, it does not depend on your Interface speed, it depends on the technical specification of your flash devices.