'\" t
.\"     Title: nvme-wdc-vs-device-waf
.\"    Author: [FIXME: author] [see http://www.docbook.org/tdg5/en/html/author]
.\" Generator: DocBook XSL Stylesheets vsnapshot <http://docbook.sf.net/>
.\"      Date: 04/15/2023
.\"    Manual: NVMe Manual
.\"    Source: NVMe
.\"  Language: English
.\"
.TH "NVME\-WDC\-VS\-DEVIC" "1" "04/15/2023" "NVMe" "NVMe Manual"
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.SH "NAME"
nvme-wdc-vs-device-waf \- Calculates the device write amplification factor and prints both TLC and SLC results
.SH "SYNOPSIS"
.sp
.nf
\fInvme wdc vs\-device\-waf\fR <device> [\-\-output\-format=<normal|json> \-o <normal|json>]
                        [\-\-namespace\-id=<nsid> | \-n <nsid>]
.fi
.SH "DESCRIPTION"
.sp
For the NVMe device given, calculates the device TLC and SLC write amplification factor\&.
.sp
The <device> parameter is mandatory and may be either the NVMe character device (ex: /dev/nvme0) or block device (ex: /dev/nvme0n1)\&.
.sp
This will only work on WDC devices supporting this feature\&. Results for any other device are undefined\&.
.sp
On success it returns 0, error code otherwise\&.
.SH "OPTIONS"
.PP
\-o <format>, \-\-output\-format=<format>
.RS 4
Set the reporting format to
\fInormal\fR, or
\fIjson\fR\&. Only one output format can be used at a time\&. Default is normal\&.
.RE
.PP
\-n <nsid>, \-\-namespace\-id=<nsid>
.RS 4
Sets the command\(cqs nsid value to the given nsid\&. Defaults to 0xffffffff if not given\&. This option may not affect anything depending on the log page, which may or may not be specific to a namespace\&.
.RE
.SH "EXAMPLES"
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
Has the program issue WDC vs\-device\-waf plugin Command :
.sp
.if n \{\
.RS 4
.\}
.nf
# nvme wdc vs\-device\-waf /dev/nvme0
.fi
.if n \{\
.RE
.\}
.RE
.SH "NVME"
.sp
Part of the nvme\-user suite\&.