Don't get too hooked up on drive performance there are more factors in play than just the PCIe version:
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I'd also advise keeping OS and data on separate physical devices. It's much easier to do major OS upgrades or fix a broken OS when you don't have to worry about data loss.
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- The Pi 5 has only a single PCIe lane available. Most drives expect four. So one quarter of the theoretical maximum bandwidth)
- PCIE on Pi 5 is only certified to run at gen 2 speeds. Given max bandwdith roughly doubles between generations that's also a quarter of what is theoretically possible on a gen 4 bus.
- If your chosen drive needs more than 5W it will need external power. 5W is all that is available via the PCIe connector. However reduced performance may reduce power consumption.
- The real peformance limit won't be the drive, it'll be the network speed. Even a SATA I HDD can saturate a 1Gb ethernet link.
- A spinng rust HDD currently still gives more MB per $ than NVMe or SSD for larger drive capacities.
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I'd also advise keeping OS and data on separate physical devices. It's much easier to do major OS upgrades or fix a broken OS when you don't have to worry about data loss.
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Statistics: Posted by thagrol — Wed Mar 27, 2024 12:34 pm