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RE: Glad they're now cheap!

That sounds about right. SATA SSD's have dropped significantly in price but some have bounced up again, depending on availability and what products the manufacturer is focusing its resources on.

2.5" SSDs use the legacy SATA III interface and protocol which was designed for spinning HDDs. Unfortunately SATA III limits performance to a theoretical max of 600 MB/sec but in reality it's somewhat lower due to overhead. The SATA interface and protocol are not ideal for SSD so the the industry shifted toward NVMe over PCIe with M.2 form factor which can be 10x faster so that's where the demand is. There's no legacy SATA protocol overhead to slow things down in the newer designs.

Just last week I bought a 1TB 2280 NVMe M.2 PCIe SSD (not the M.2 SATA type that Synology uses in their M.2 slots). You can see the performance difference here:

My Samsung 1TB SATA III 2.5" SSD:

My Samsung 1TB PCIe 4.0 NVMe M.2 SSD:

My Synology NAS. Speed is not HDD limited but 1-Gigabit Ethernet limited.

In a NAS used for streaming music it doesn't matter. The end result with a HDD will be just as fast as the fastest SSD.




Edits: 08/06/24 08/06/24
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