- Compression-based SSD pushes PCIe Gen5 performance beyond the limits of conventional flash
- Extreme benchmark results are based on cleanly and predictably compressed workloads.
- The Roealsen6 R6101C trades fixed capacity assumptions for speed and efficiency
DapuStor is a Chinese startup that develops and manufactures very large – and very fast – enterprise-grade SSDs.
These include the DapuStor J5060 61.44 TB and the Roealsen6 R6101 7.68 TB. The company’s latest drive is the Roealsen6 R6101C 7.68 TB SDD, which TweakVille examined and delighted.
Testing showed the drive delivered record sequential and mixed workload throughput when compression was enabled – and TweakVille wrote: “This is by far the fastest rate we have experienced on a single PCIe Gen5 x4 SSD. »
Highest sequential throughput and mixed workload
Part of DapuStor’s Roealsen6 series, the new SSD is built around the company’s in-house DP800 controller and firmware. It uses a PCIe 5.0 interface and eTLC 3D NAND flash, while supporting the NVMe 2.0 protocol.
Unlike standard SSDs, the R6101C includes an application processor combined with a transparent hardware compression engine.
This allows data to be compressed before being written to flash, thereby reducing the amount of physical storage accessible.
Performance and usable capacity naturally depend on the degree of data compressibility. Users can prioritize raw speed or effective capacity, although both are directly related to workload characteristics.
Under ideal conditions, the compression system can achieve a ratio of 4:1. This allows a 7.68 TB disk to present many times its physical capacity to the host.
This echoes long-standing practices in tape storage, where LTO media lists native and compressed capacities.
At a compression ratio of 2:1, TweakVille measured up to 14,200 MB/s sequential writes and 15,050 MB/s sequential reads. Both figures exceeded factory specifications.
Random writing tests also set records. The results reached approximately 1.27 million IOPS in 4K workloads at the same compression level.
The SSD consumes around 18W under load and uses a U.2 form factor. It is rated at 1 DWPD and supports popular enterprise platforms.
Compression-based SSDs are of course nothing new, with ScaleFlux products already on the market, but the new Roealsen6 adds another option for buyers.
TweakVille rated it 99/100, although noting that actual results will depend on achieving compression levels that will not apply to all data types.
Hardware Editor Jon Coulter concluded: “DapuStor’s Roealsen6 R6101C 7.68TB delivered the highest sequential throughput and mixed workload throughput we’ve ever encountered on any Flash-based SSD.
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