cycreation - Fotolia

Q
Get started Bring yourself up to speed with our introductory content.

What is SATAe and can it eliminate performance gaps?

When compared with earlier Serial ATA standards, SATAe is more advanced, reduces latency, has a higher performance level and offers backwards compatibility.

SATA Express (Serial ATA Express or SATAe) merges PCI Express (PCIe) bandwidth with common SATA connectors. The technology delivers very high performance, while sustaining backwards compatibility with ordinary SATA standards.

One of the driving factors behind SATAe development was to provide higher performance using lower-cost SATA SSDs. SATAe exposes multiple PCIe lanes and two SATA 3.0 (6 Gbps) ports through one host SATAe connector. It supports PCIe storage devices or SATA storage devices, but not both concurrently. SATAe utilizes two lanes with PCIe 2.0 and four lanes with PCIe 3.0.

A good way to think about SATAe is that it's a more advanced, higher-performance SATA standard. It pushes SATA performance for flash SSDs to .6 GBps to .8 GBps with PCIe 2.0 and up to 1.97 GBps for PCIe 3.0.

One indispensable element to the SATAe performance gains comes from taking advantage of PCIe NVM Express. NVMe reduces latency overhead by more than 50%, primarily by eliminating the additional layers of bus abstraction. This non-trivial latency improvement provides a huge boost in SATA performance. Another key to SATAe market acceptance is backwards compatibility with the older SATA cable interface. The SATAe standard specification today is 3.2.

Chipsets for SATAe using PCIe 2.0 and PCIe 3.0 first appeared in 2014 from Intel (X99) and AMD. Most SSD vendors also have SATAe products available today. SATAe narrows the performance gap between small form factor (2.5-inch) flash SSDs and PCIe flash SSDs, but it does not eliminate it. Remember the SATAe connector supports PCIe SSDs or SATA/SATAe SSDs. The PCIe SSDs will still deliver up to twice the performance of SATAe SSDs.

A word of caution: Like many standards, there is room for vendor adherence to vary enough so that not all SATAe interfaces or SSDs are backwards compatible with the older SATA interfaces. Make sure any SATAe implementation meets organizational requirements.

Next Steps

Server-side flash form factors include SATAe

NVMe, SCSI Express reveal flash storage performance benefits

SSD technology benefits and best practices

This was last published in September 2015

Dig Deeper on Solid state storage technology

PRO+

Content

Find more PRO+ content and other member only offers, here.

Have a question for an expert?

Please add a title for your question

Get answers from a TechTarget expert on whatever's puzzling you.

You will be able to add details on the next page.

Join the conversation

1 comment

Send me notifications when other members comment.

By submitting you agree to receive email from TechTarget and its partners. If you reside outside of the United States, you consent to having your personal data transferred to and processed in the United States. Privacy

Please create a username to comment.

How has SATAe implementation eased the performance gap between your small form factor SSDs and PCIe flash SSDs?
Cancel

-ADS BY GOOGLE

SearchCloudStorage

SearchDisasterRecovery

SearchDataBackup

SearchStorage

SearchITChannel

Close