[jeffbee]

I would start with the LBA format, which is likely to be suboptimal for compatibility.

[zokier]

somehow I4g drives don't like to get formatted

    # nvme format /dev/nvme1 -n1 -f
    NVMe status: INVALID_OPCODE: The associated command opcode field is not valid(0x2001)
    # nvme id-ctrl /dev/nvme1 | grep oacs
    oacs      : 0

but the LBA format indeed is sus:

    LBA Format  0 : Metadata Size: 0   bytes - Data Size: 512 bytes - Relative Performance: 0 Best (in use)

[jeffbee]

It's a shame. The recent "datacenter nvme" standards involving fb, goog, et al mandate 4K LBA support.

[zokier]

it'd be great if you'd manage to throw together quick blogpost about i4g io perf, there obviously something funny going on and I imagine you guys could figure it out much easier than anybody else, especially if you are already having some figures in the marketing.