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On Fri, Nov 12, 2021 at 5:57 PM Mark Knecht <markknecht@×××××.com> wrote: |
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> |
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> which I don't think is available yet but will run in the $250 |
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> range without the drives. It appears that the motherboard |
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> they designed takes the PCIe to a card with a PCIe-to-SATA |
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> controller which is how you get better performance. |
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With the USB3 solution your $40 SBC can directly access a hard drive. |
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Now we're talking about adding $250 of hardware to get to SATA. |
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Honestly, if you're going to start spending that much I'd really |
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question why we're not just using a PC. |
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I would love to see more reasonably-priced ARM options with decent IO |
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and RAM. If you want ARM and 32GB of RAM good luck finding something |
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for under $1k. For anything that runs 24x7 the power savings are |
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quite significant with ARM, but you definitely give up performance and |
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IO and of course general flexibility, If you're going to start |
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spending hundreds of dollars on ARM unless it is as some kind of |
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prototyping setup I'd really question why you wouldn't just use |
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inexpensive PC hardware. Get something with integrated graphics and |
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you have lots of PCIe lanes available for IO. You can get used HBAs |
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fairly inexpensively as well, though I do question the reliability of |
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some of that stuff (used). |
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One other thing, I've used LSI HBAs with Rockpro64 SBCs (which have |
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PCIe), and the HBAs use a ton of power. The RK3399 might use very |
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little power (esp idle), but that LSI HBA is practically a space |
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heater even when idle. Maybe their newer stuff is more efficient, but |
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you're not going to get those for $30 on eBay. |
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-- |
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Rich |