form factor (Facteur de forme)
(22 mm x 80 mm) is the format found in more than 90% of cases.
form factor SSDs use SATA
interface with NVMe
M.2 NVMe PCIe
are primarily distinguished by their form factor and the protocols used (NVMe, AHCI
The four most common form factors are SATA (2.5 inch format), mSATA, M.2 and PCIe
AHCI transfer protocol is used by SATA
drive can accommodate both SATA and PCIe connectors as well as USB 3.0.
It is operated either with the AHCI protocol or the Non-Volatile Memory Express (NVMe) protocol
Most common is the 2280 format
, which means nothing more than 22 mm x 80 mm
(optically comparable to a RAM bar)
can be PCIe-based and use the NVMe protocol support up to four PCIe lanes, resulting in much higher data transfer rates than the 6Gbps of SATA or mSATA
For this reason, M.2 has not only overtaken mSATA, but also SATAe relatively quickly, and is now used in all newer Ultrabooks and flat notebooks.
In principle, M.2 drives (whether with SATA-III or PCIe connection) can also be integrated into desktop PCs, as long as the format and length of the slot match.
Risk of confusion between M.2 SATA SSDs and M.2 NVMe PCIe SSDs
SSDs based on the PCIe form factor use PCIe technology and the NVMe protocol.
PCIe drives are larger than M.2 drives and allow more chips per card.
As a result, PCIe SSDs are especially interesting for larger devices such as desktops and servers, as they also provide higher capacities.
SSDs in the latest notebooks come in two form factors:
2.5-inch (same as 2.5" HDDs but thinner in some cases) with traditional SATA storage interface and
smaller M.2 card format with its own interface.
Some laptops, primarily high-performance business and gaming class machines, combine different storage interfaces and bays.
In these laptops, PC makers usually pair an empty 2.5” hard drive with an M.2 solid state drive with operating system and programs installed on it.
This combination delivers both large storage space and fast OS boot-up and program loading speeds.
Some pc portables have SSD 512go en pci-express + Optane 32go
Embedded Multimedia Card (eMMC) Storage
Embedded Multimedia Card or eMMC is more affordable and slower Flash-based storage than solid state drives.
eMMC is usually found in smartphones and other consumer electronics devices, but it’s used in personal computers too.
In the PC segment, you can find eMMC soldered onto motherboards of some budget-class notebooks, tablet PCs, and 2-in-1 computers.
eMMC capacity provided by these PCs is either 32GB or 64GB, rarely 128GB.
Flash type memory
Sata, Sata M.2, PCIe, M.2, U.2
Faster than flash memory
Optane SSD 3D xPoint
Try to clone an (internal) NVMe SSD to another NVMe SSD (external device)
EaseUS Todo Backup
Acronis True Image
Macrium Reflect (looks fine)
Zinstall Full Back
Active Disk Image
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