2 ms·
m.2 is a form factor, not a speed. It could have been the SATA type m.2 instead of the NVMe type m.2 but then it would have needed a SATA controller on the PCIe
by zamadatix 3y ago
m.2 is a form factor, not a speed. It could have been the SATA type m.2 instead of the NVMe type m.2 but then it would have needed a SATA controller on the PCIe bus for no benefit. The cost/GB of cheap (SATA or NVMe) drives is about the same regardless if peak read is 500 MB/s or 1500 MB/s anyways.
- SushiHippie 3y agoOkay fair, I just always think of NVMe drives with 5000-7000 MB/s read speed when M.2 gets mentioned and I misremembered that SATA (non M.2) SSDs were cheaper.
- Havoc 3y agoPretty sure the rasps are single lane gen 3. So 1 gig a sec max
- SushiHippie 3y agoSecond sentence in TFA is: > It provides fast (up to 500 MB/s) data transfer
- zamadatix 3y agoNeither of these takes is necessarily incorrect. Officially yes, out of the box it's 1x PCIe 2.0 and you get ~500 MB/s. There is also an boot flag to switch the PCIe from 2 to 3 and it doubles the speed to ~1000 MB/s. That mode is not officially certified as PCIe 3.0 compliant though due to the way its run but it seems to work for just about anything so long as you don't use a really long ribbon cable. https://www.jeffgeerling.com/blog/2023/forcing-pci-express-gen-30-speeds-on-pi-5 https://www.jeffgeerling.com/blog/2023/forcing-pci-express-g...