SYNOPSIS

nvme wdc namespace-resize <device> [--nsid=<NAMSPACE ID>, -n <NAMSPACE ID>] [--op_option=<OP OPTION>, -o <OP OPTION>]

DESCRIPTION

For the NVMe device given, sends the WDC Vendor Specific Command that modifies the namespace size reported by the device.

The <device> parameter is mandatory NVMe character device (ex: /dev/nvme0).

This will only work on WDC devices supporting this feature. Results for any other device are undefined.

OPTIONS

-n <NAMSPACE ID>
--namespace-id=<NAMSPACE_ID>

Namespace ID; ID of the namespace to resize

-o <OP OPTION>
--op-option=<OP OPTION>

Overprovisioning Option; defaults to 0xF 

Valid Values:
0x1 - 7% of Original TNVMCAP reported value
0x2 - 28% of Original TNVMCAP reported value
0x3 - 50% of Original TNVMCAP reported value
0xF - 0% of Original TNVMCAP reported value (original config)
All other values - reserved

EXAMPLES

  • Resizes namespace 1 to 50% of the original TNVMCAP reported value: 

    # nvme wdc namespace-resize /dev/nvme0 -n 1 -o 3

  • Resizes namespace 2 to 7% of the original TNVMCAP reported value: 

    # nvme wdc namespace-resize /dev/nvme0 --namespace-id=2 --op-option=1

NVME

Part of the nvme-user suite.