Kioxia CM7 Series: CM7-R and CM7-V Model Numbers, DWPD, Form Factors and UK Prices

Kioxia CM7-R vs CM7-V: two series, two lists

Kioxia publishes a separate product brief for each CM7 series, and they should stay separate. The R series is its read intensive drive and the V series its mixed use drive. They share an interface and a form factor but not their capacities, model numbers or endurance. Figures are the highest each brief's rows print, in single port (1x4) mode.

These are ceilings, and a given size can sit well under its headline. Some cells in the briefs span several capacities, so the two tables below assign each figure by where it sits on page 2 of each brief. All figures are 'up to', in single port (1x4) mode.

Kioxia's series-level tech brief quotes up to 600K IOPS random write for the CM7 Series as a whole. That figure is the V series: the R brief's headline is 310K. A title that gives a CM7-R 600K is mixing the two.

On the work each series suits, only the description sentences differ, and both include online transaction processing. The R brief's sentence adds business intelligence, software defined storage and virtualisation. The V brief's adds high performance computing, IoT and edge computing, and media streaming. Both briefs then print the same Key Applications list: software defined storage and virtualisation, data warehousing, online transaction processing, business intelligence, and artificial intelligence and machine learning.

Kioxia CM7 SSD endurance: what 1 DWPD and 3 DWPD mean in terabytes

Kioxia defines one full drive write per day as writing and rewriting the drive to full capacity once a day for the specified lifetime, and adds that actual results may vary. So a DWPD figure scales with size, and the series with less capacity can still take more data.

That grid is our arithmetic, capacity times DWPD, and not a Kioxia table. On those figures the largest CM7-V takes more writes a day than the largest CM7-R, at well under half the capacity. We have not found a Kioxia document stating a TBW figure for these models, so we print no lifetime total.

Kioxia CM7-R and CM7-V model numbers by capacity

Each 2.5-inch brief gives four model strings per capacity: base, SIE, SED and FIPS SED. Reading the grids below, the character after KCMY marks the option (1, X, D or F), the next letter the series (R or V), and the ending the capacity. That pattern is our reading of Kioxia's rows. In each cell the strings follow the order in the column heading.

For E3.S, Kioxia's product pages list CM7-R base models KCM71RJE15T3, KCM71RJE7T68, KCM71RJE3T84 and KCM71RJE1T92, and CM7-V base models KCM71VJE12T8, KCM71VJE6T40, KCM71VJE3T20 and KCM71VJE1T60. The same pages label rows SIE Model Number, SED Model Number and FIPS SED Model Number. Under those rows, for CM7-R, the stems KCM7XRJE, KCM7DRJE and KCM7FRJE each take the endings 15T3, 7T68, 3T84 and 1T92. For CM7-V, the stems KCM7XVJE, KCM7DVJE and KCM7FVJE each take the endings 12T8, 6T40, 3T20 and 1T60. Those come from Kioxia's E3.S web pages, checked 5 November 2026, not from a data sheet, so treat them as less firm than the briefs.

Kioxia CM7 30TB and the CM7-R 15.36 TB

On our reading, a Kioxia CM7 30TB means the 30,720GB CM7-R, base model KCMY1RUG30T7. Only the R series reaches that size: the V series stops at 12,800GB, so a 30TB CM7-V is not on these sheets. The strings we hold for E3.S stop at 15,360GB for the R series, so 30,720GB is a 2.5-inch model as far as this page can show. It is not the fast end of the R series: it lists the lowest R figures on sequential read, random read and random write, and only the 1,920GB is slower on sequential write.

The CM7-R 15.36 TB is KCMY1RUG15T3 in the 2.5-inch form and KCM71RJE15T3 in E3.S. Kioxia counts a terabyte as 1,000,000,000,000 bytes and notes that an operating system reports less. On our arithmetic, using the tech brief's 1,099,511,627,776 bytes, a 30,720GB drive shows as about 27.9 TB in an operating system that counts that way.

Kioxia CM7 security options and the export caveat

• SIE, the instant-erase option: supports Crypto Erase.
• SED: supports TCG Opal and Ruby SSCs, and Kioxia notes a few unsupported features of TCG Opal SSC.
• FIPS SED: uses a security module designed to comply with FIPS 140-3. Kioxia asks buyers to enquire for the latest validation status.

Kioxia says security optional models are not available in all countries due to export and local regulations. We have not found a Kioxia document stating which of them are offered in the UK. If you need an SED or FIPS model, confirm with the seller that the exact model string is what you will receive, and take any validation question to Kioxia.

Kioxia CM7 Series interface: PCIe 5.0, NVMe 2.0 and dual port

Both briefs give PCIe 5.0 and NVMe 2.0, with a maximum interface speed of 128 GT/s as PCIe Gen5 single x4 or dual x2. The dual-port design is aimed at high availability, and the tech brief describes it as a second path of access to the same drive in case a path failure occurs. The speed figures above are for single port mode, and we have not found a Kioxia document giving them in dual x2.

The briefs also list a proprietary Kioxia controller and firmware with 112-layer BiCS FLASH 3D TLC, and Open Compute Project Datacenter NVMe SSD specification v2.0 support, with the caveat 'not all requirements'. If your procurement depends on the OCP specification, that caveat is the line to ask about.

Kioxia CM7 power loss protection, power and reliability

Both 2.5-inch briefs list power loss protection (PLP) and end-to-end data protection among the key features, and both E3.S pages list the same line under Key Features. We have not found a Kioxia document describing how the CM7's PLP is built. For a maker's description of the mechanism, the Samsung PM9A3 page prints Samsung's wording, which is about a different drive. The tech brief adds wear levelling, customisable end-of-life behaviour and die failure recovery, which it says are standard in Kioxia's enterprise and data centre PCIe NVMe SSDs.

• Supply: 12 V within 10% and 3.3 V within 15%.
• CM7-R active power, 2.5-inch: 25 W typ. at 30,720GB, 15,360GB, 7,680GB and 3,840GB, and 22 W typ. at 1,920GB only. The CM7-R E3.S page lists different values: 25, 24 and 21 W.
• CM7-V active power, 2.5-inch: 25 W typ. at 12,800GB, 6,400GB and 3,200GB, and 22 W typ. at 1,600GB. The tech brief gives an up to 25-watt power envelope for the series.
• Ready power: on the CM7-R, 5.5 W typ. at 30,720GB and 5 W typ. at the other four sizes. On the CM7-V, 5 W typ. at all four.
• CM7-R operating temperature, by the composite temperature SMART reports: 0 °C to 72 °C at 30,720GB, 0 °C to 73 °C at 15,360GB and 7,680GB, and 0 °C to 76 °C at 3,840GB and 1,920GB.
• CM7-V operating temperature, on the same measure: 0 °C to 73 °C at 12,800GB and 6,400GB, and 0 °C to 76 °C at 3,200GB and 1,600GB. Non-operating on both: -40 °C to 85 °C.
• Size and weight of the 2.5-inch drive: 15.0 mm thick, 69.85 mm wide, 100.45 mm long, 130 g maximum.

Kioxia says MTTF is not a guarantee or estimate of product life, so read the 2,500,000 hours as a statistical value. The 5 year warranty is the briefs' statement about the product. We have not found a Kioxia document stating how it applies to a drive bought through a particular seller, so ask before you buy.

Kioxia CM7 form factors: U.3 2.5-inch or E3.S

The tech brief lists two form factors for the CM7 Series: U.3 (2.5-inch) and EDSFF E3.S. It also notes that 2.5-inch indicates the form factor and not its physical size. The briefs state SFF-TA-1001 conformance for the U.3 version.

SNIA's 2022 slides describe the 2.5-inch device evolving into PCI Express U.2, and the E3 family rebuilding that concept from the ground up. They place E3.S at up to 25 W, which is the form factor's ceiling and not a CM7 measurement.

Quarch Technology, in a 2019 article, describes U.3 as a tri-mode standard that builds on the U.2 specification and uses the same SFF-8639 connector. It says U.3 drives are backward compatible with U.2, and that U.2 drives are not compatible with U.3 hosts. That is a general statement about the two standards. The U.3 SSD page goes further into the standard.

The bay decides this, not a preference. A 15 mm 2.5-inch drive and a 7.5 mm E3.S module are different hardware. We have not found a Kioxia document stating how a U.3 CM7 behaves in a U.2 bay, and we hold no list of servers, so check your server's own documents for the form factor, the interface and the drive height.

Kioxia CM7 price on Amazon.co.uk

When the table holds rows, "Prices checked" at the top of the page gives the time of reading. Prices are pounds sterling inc VAT, sorted per TB, and each row shows its condition. The table holds no listings right now. That includes no listings in new condition. R and V can sit in one table, so check the model string before comparing rows.

The filter takes Kioxia titles naming CM7 or a KCMY model string, and leaves out CD8, CM6 and XD7P. Titles are the seller's wording, so match the model string to the grids above, and if a listing gives none, ask for it before you press Buy on Amazon. For the choice of interface before the model, enterprise SSD covers SATA, SAS and NVMe.

In-stock alternatives

None of these is the product this page covers: they are what is in stock on Amazon.co.uk beside it right now. Each row says why it is listed. Check the interface, form factor and part number against your system before buying.