1NVME-WDC-VS-DEVIC(1)              NVMe Manual             NVME-WDC-VS-DEVIC(1)
2
3
4

NAME

6       nvme-wdc-vs-device-waf - Calculates the device write amplification
7       factor and prints both TLC and SLC results
8

SYNOPSIS

10       nvme wdc vs-device-waf <device> [--output-format=<normal|json> -o <normal|json>]
11                               [--namespace-id=<nsid> | -n <nsid>]
12

DESCRIPTION

14       For the NVMe device given, calculates the device TLC and SLC write
15       amplification factor.
16
17       The <device> parameter is mandatory and may be either the NVMe
18       character device (ex: /dev/nvme0) or block device (ex: /dev/nvme0n1).
19
20       This will only work on WDC devices supporting this feature. Results for
21       any other device are undefined.
22
23       On success it returns 0, error code otherwise.
24

OPTIONS

26       -o <format>, --output-format=<format>
27           Set the reporting format to normal, or json. Only one output format
28           can be used at a time. Default is normal.
29
30       -n <nsid>, --namespace-id=<nsid>
31           Sets the command’s nsid value to the given nsid. Defaults to
32           0xffffffff if not given. This option may not affect anything
33           depending on the log page, which may or may not be specific to a
34           namespace.
35

EXAMPLES

37       •   Has the program issue WDC vs-device-waf plugin Command :
38
39               # nvme wdc vs-device-waf /dev/nvme0
40

NVME

42       Part of the nvme-user suite.
43
44
45
46NVMe                              09/29/2023              NVME-WDC-VS-DEVIC(1)