This week is OCP Summit 2021, and it additionally marks the week earlier than Supercomputing 2021. Consequently, we’re getting many bulletins. Kioxia has two of them. First, the Kioxia CD7 is being launched. Second, the Kioxia XD6 is now in manufacturing. Whereas each help EDSFF, the CD7 has an additional attention-grabbing function, it’s a PCIe Gen5 SSD.
What’s the Cope with EDSFF?
As a fast primer, you will have seen the Kioxia XD6 in our piece E1 and E3 EDSFF to Take Over from M.2 and a couple of.5 in SSDs. Right here is the accompanying video:
The large deal right here is that server distributors are in a position to match extra drives into chassis with EDSFF through the use of a type issue designed for higher area and cooling utilization.
The E1.S drives are the smaller drives, primarily for 1U methods, whereas the E3.S drives are taller, extra for 2U chassis. The primary announcement immediately is that the XD6 pictured in our piece from earlier this yr is now delivery as a PCIe Gen4 drive.
Kioxia CD7 PCIe Gen5 NVMe SSD
The Kioxia CD7 is absolutely attention-grabbing. First, it’s an E3.S 7.5MM (1T) NVMe SSD. If one seems carefully on the photographs, the CD7 seems quite a bit just like the drive labeled “E3.S” within the photograph above.
Whereas this has most of the options reminiscent of energy loss safety (PLP) and Sanitize Immediate Erase (SIE) it additionally has a function we must always talk about. Particularly, the drive is a PCIe Gen5 x4 drive, however it’s being marketed as optimized for PCIe Gen5 x2 efficiency. Successfully, whereas utilizing present NAND as a substitute of constructing a drive that’s targeted on delivering 2x the efficiency per machine of the PCIe Gen4 SSDs delivery immediately, it’s as a substitute utilizing half the lanes. Utilizing two lanes as a substitute of 4 means one can use twice as many drives off of a set variety of CPU PCIe Gen5 lanes. It is a massive deal and as we transfer into the next-generation of server CPUs, that is going to be a key dialogue subject.
We mentioned this in our earlier EDSFF piece, however the E3.S and 2T variant (2T is principally twice the thickness) permit for higher energy and cooling than present U.2/ U.3 2.5″ NVMe SSDs have in 15mm casings.
Plenty of the advertising supplies you might be more likely to see round E3.S and E3.S 2T, in addition to E1.S / E1.L for that matter, are going to be targeted on energy and cooling. Nonetheless, the connector was designed to help higher-speed interfaces together with PCIe Gen5 x16.
We nonetheless have a while between now and once we get PCIe Gen5 servers. Now we have began to see Intel twelfth Gen Core Alder Lake and platforms help PCIe Gen5, however we’re nonetheless just a few months from seeing them on the server aspect. Nonetheless, the Kioxia CD7 PCIe Gen5 x2 optimization exhibits that hyper-scalers and server OEMs are desirous about extra than simply getting the utmost per-drive bandwidth and as a substitute are desirous about optimizing whole server platforms with the correct variety of drives for a given efficiency, capability, value, and reliability vary.