> could you explain how raid 5 relates to sata vs sas? > i can't see now it's anything but a non-sequitor.
Here is the motivating real-world business case: You are in the movie post-production business and need > 50 TB of online storage at as low a price as possible with good performance and reliability. 7200 rpm SATA (currently ~15ยข/GB on Newegg) plus RAID narrows the performance and reliability of benefits of 15k rpm SAS (currently ~$1/GB) at a much lower cost.
