Hi, I am testing GPUDirect Storage on a DGX Spark system (Grace-Blackwell, NVIDIA GB10 GPU, ARM64, Ubuntu 24.04, CUDA 13.0). Gdscheck reports: GPU index 0 NVIDIA GB10: Model Not Supported NVMe / NVMeOF / BeeGFS / etc: Unsupported properties.use_compat_mode : true My versions: - CUDA: 13.0 -…

I’m also looking for GDS enablement on DGX Spark.

Thanks @NVES , that entry in the FAQ helps. Two doubts though The FAQ says “GPUDirect RDMA is not supported”. Seems “GPUDirect Storage” (GDS) has the same challenge (GPU memory is behind C2C and NVMe SSD is behind PCIe) and therefore not supported? Is this constraint applicable for other NVlink C…

[image] kanjosh2024: Is this constraint applicable for other NVlink C2C based systems (like GH200) where GPU is no longer behind the PCIe? no. This limitation applies to Gb10 Spark only.

@NVES I see, interesting. But on other c2c system (GH or GB200) , GDS works without any hops? Notwithstanding architecture change, can NVMe SSD still do DMA into the GPU memory without any extra hop like bounce buffering of data into CPU side LPDDR before it moves to GPU memory via C2C?

GDS support for DGX Spark

Accelerated Computing DGX Spark / GB10 User Forum DGX Spark / GB10

NVES November 12, 2025, 3:34pm 3

GDS is not supported on Spark, due to DGX Spark / GB10 FAQ

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GDS support for DGX Spark

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