Solid State Drives (SSD)
- is a type of storage device
- uses integrated circuit assemblies as memory to store data persistently (typically NAND Flash Memory as the storage medium)
- defragmentation not needed
- has a controller to manage random-access-memory
- typically used as secondary memory
SSD - History
When SSDs first developed, it was clear that the older SATA data transport system was a bottleneck. The SSDs could transfer data much faster than SATA could send it. NVMe was the answer. It can send data 3–6 times faster, but it needed a faster bus, and PCIe was already there and could do the job. The first NVMe drives used the usual PCIe slot form factor. But that took up a lot of room on the motherboard, and so the M.2 form factor was designed
SSD - Things to Consider
- Memory Controller -
- DRAM Cache -
- Storage Medium Types:
- NAND Flash Memory - SLC, MLC, TLC, QLC, or PLC
- Intel® Optane™
SSD - Types
Subpages
additional details: https://www.snia.org/forums/cmsi/knowledge/formfactors
|
Types |
Description |
Physical Connector |
Connection Protocol |
Connection Technology |
Form Factor |
Image |
|---|---|---|---|---|---|---|
|
2.5” SATA |
|
SATA |
2.5” |
| ||
|
SAS |
2.5” | ||||
|
mini-SATA |
|
mini-SATA |
similar to M.2 |
| ||
|
NVMe M.2 |
|
M.2 |
M.2 |
| ||
|
SATA M.2 |
|
M.2 |
M.2 | |||
|
SFF-8639 |
ANY |
| |||
|
SFF-8639 |
PCIe/SATA/SAS |
NVMe/SATA/SAS |
ANY | ||
|
PCIe |
|
Card |
| |||
|
? |
Card |
|
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/mini-sata-msata.png)
/m.2.png)
/nvme-m.2-size-chart.jpg)
/u.2-ssd-connector.png)
/pcie-ssd-card.jpg)
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