KIOXIA BG4 M.2 NVMe SSD

CM4 Functionality	Pi 5 Functionality	Driver Required?	More Info
Full	Untested	No	GitHub Issue

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Description and Notes

KIOXIA’s BG4 M.2 NVMe SSD drive is an inexpensive NVMe SSD commonly used in laptops.

It is an inexpensive SSD that doesn’t include any DRAM, and relies on a technology called NVMe Host Memory Buffer (HMB) that essentially moves NVMe cache to the system’s RAM.

Using my disk-benchmark.sh script, I got the following performance numbers on the Pi CM4:

Benchmark	Result
fio 1M sequential read	192 MB/s
iozone 1M random read	170 MB/s
iozone 1M random write	157 MB/s
iozone 4K random read	29.71 MB/s
iozone 4K random write	54.50 MB/s

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KIOXIA BG4 M.2 NVMe SSD