Newbe Dev Stack

Answer : Solution 1: IOPs is the difference your looking for in the "speed". The simple way to explain the difference is that SATA is half duplex and SAS is full duplex. SATA drives are dumb and have to communicate with the controller for operations. SAS drives are smart and only requests and returns use the bus. Depending on your usage case, spending more may not gain much.. Solution 2: The "SATA = 7.2K RPM, SAS = 10/15K RPM" mind-set is strong, and (in my opinion anyway) where most of the "SAS is faster than SATA" thinking comes from. There are some slight differences between SAS and SATA drives, notably in their on-board caching algorithms (NCQ vs. TCQ). However, the performance difference of equivalently specced hard-drives will be fractional percentage points in most use-cases. Solution 3: This is only a single anecdote, but I did some performance comparisons a while back for sequential read/write speeds on Seagate Barracuda ES.2 SATA a...

Answer : Can I connect SATA drives to SAS connectors? Yes , well known question / answer Does the 6 Gb/s transfer rate means that I'll get an equivalent of SATA 3 (which is important if I use SATA 3 SSDs)? Yes . They will negotiate the speed, slower device wins (12G sas ctrl will lower speed to sata 2 drive if needed) or drive will lower speed to older SAS controller. MSM software (or BIOS) can show you negotiated speeds. Are there drawbacks using SAS connectors instead of SATA 3 ones for SATA 2 and SATA 3 drives? In other words, if the motherboard has both SATA 3 and SAS connectors, what is the reason, if any, to use SATA 3 connectors for SATA drives? Use SAS . Usually SATA connector are part of Intel southbridge. Tests I've done show throughput drops proportionally to number of SATA drives connected to southbridge and results were horrific for 6 drives used simultaneously on Intel southbridge. SAS controller on your motherboard is probably LSI using...