What is the read/write speed of the RS1221+ when configured with the included 32TB storage?

The RS1221+ has a read performance of up to 2,315 MB/s and a write performance of up to 1,147 MB/s.

What are the dimensions of the Synology RS1221+ RackStation and will it fit in a standard server rack?

The dimensions of the Synology RS1221+ RackStation are 3.46" x 18.98" x 12.07" (with server handles).

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Synology RS1221+ RackStation with 16GB RAM and 32TB (8 x 4TB) of Synology Plus NAS Drives Fully Assembled and Tested By CustomTechSales