SAS drives max out around 1500 MB/s.Īn important point of note is that SAS drives get built with speed as the goal. SATA drives generally max out around 600 MB/s. SAS drives typically show better data transfer numbers than SATA drives. Those higher speeds let SAS drives read and write faster than SATA drives. SAS drives average either 10,000 rpm or 15,000 rpm. Some SATA drives still show up at 5400 rpm and a small percentage have a higher speed. SAS and SATA operate in largely separate worlds when it comes to speed.Ī typical SATA drive averages 7200 rpm. Enterprise systems routinely process terabytes of data. Consumer computer data processing can generally be measured in gigabytes from day-to-day. SAS drives end up in enterprise systems.Ĭonsumer computers process substantially less data on average than enterprise systems. SATA drives generally end up in consumer computers. The more data a drive reads, the more likely a drive will experience errors. The thing you should bear in mind is that error rates are related directly to the amount of data that a drive reads. So, for example, a SAS drive might prove 10 times or 100 times less likely to fail. The difference in error rates typically gets expressed in orders of magnitude. Without delving into numbers that don’t mean much to most people, SAS drives experience these failures far less often. In basic terms, a URE happens when a hard drive finds a spot that it can’t read and the drive fails. One of the main differences between SAS and SATA drives is the rate of unrecoverable read errors (URE). SAS and SATA drives offer very different kinds of performance across several areas. The price difference isn’t price gouging on the part of hard drive manufacturers. By comparison, you can get a decent 1TB SATA drive for less than $100 dollars. A decent 300GB SAS hard drive might run you $200-$300. SAS drives routinely cost more than SATA drives. Right at the top of the list of differences between SAS and SATA hard drives is the cost. Keep reading and we’ll walk you through some of the big differences. In practice, you’ll find more than one difference between SAS and SATA drives. That means the drives look very similar on the surface. Specifically, it’s the SAS vs SATA hard drive divide.īoth SATA and SAS use the traditional platters and magnetic read/write heads people associate with hard drives. That’s without any mention of solid state drives, the main competition for traditional HDDs.Įven within the world of HDDs, you find a divide that many people don’t recognize immediately. VRLA Tech AMD Ryzen Threadripper WorkstationĪround 300 million hard drive disks shipped in 2017 alone.VRLA Tech AMD Ryzen Threadripper Pro Workstation.
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