SD Express Integrates PCIe and NVMe for up to 985 MBps Transfer Rate
The SD Association announced today the SD7.0 specifications, which introduce the SD Express featuring a PCIe interface and the new 128TB SD Ultra Capacity (SDUC) cards.
The PCIe interface delivers a 985 megabytes per second (MB/s) maximum data transfer rate and the NVMe upper layer protocol enables advanced memory access mechanism, enabling new opportunities for the popular SD memory card. This is a 1.5 faster than the current fastest standard (UHS-III 624MB/s).
In addition, the maximum storage capacity in SD memory cards grows from 2TB with SDXC to 128 TB with the new SD Ultra Capacity (SDUC) card.
"With SD Express we're offering an entirely new level of memory card with faster protocols turning cards into a removable SSD," said Hiroyuki Sakamoto, SDA president.
In addition to performance advancements, SD Express maintain the advantage of SD's backward compatibility and interoperability. The PCIe interface was added in addition to the existing SD (UHS-I) interface, allowing a card with SD Express to operate interchangeably in new SD Express capable hosts as well as billions of existing SD host products in the market today.
SD Express will be initially offered on SDUC, SDXC and SDHC memory cards. The protocol uses the well-known PCIe 3.0 specification and NVMe v1.3 protocols defined by PCI-SIG and NVM Express, respectively, on the second row of pins used by UHS-II cards today. These cards also provide system developers new options offered by PCIe and NVMe capabilities, such as Bus Mastering, Multi Queue (without locking mechanism) and Host Memory Buffer.
The SDA released visual marks to denote SD Express and SDUC memory cards for easy matching with devices' recommendation.
http://cdrinfo.com/Sections/News/Details.aspx?NewsId=70094wow, SDUC that can store up to 128 Tbytes of data. That would be in the future where future SDUC card can store data up to that amount. maybe 15 years or later from now i think.
For now, i think the highest storage capacity SDXC card can only store up to is about 2 TBytes and that card is possibly very expensive. So i think most users will be satisfied with 128 Gbytes and 256 Gbytes SDXC card for now as its much more affordable.
Also, the newer SDUC card might support SD Express that has feature of PCIe interface which supports transfer speed of up to 985 Mbytes per second or nearly 8 Gbit per second. That is really fast transfer speed there. And this SD Express also has another feature of NVMe and not sure what it does but it sounds cool.
Topic: SD Express Transfer Rate up to 985 MBps And SDUC Card Can Store Up to 128 TB (Read 1614 times)