nvme-io-passthru - Online in the Cloud

PROGRAM:

NAME

nvme-io-passthru - Submit an arbitrary io command, return results

SYNOPSIS

nvme-io-passthru <device> [--opcode=<opcode> | -o <opcode>]
[--flags=<flags> | -f <flags>] [-rsvd=<rsvd> | -R <rsvd>]
[--namespace-id=<nsid> | -nsid <nsid>]
[--cdw2=<cdw2>] [--cdw3=<cdw3>] [--cdw10=<cdw10>]
[--cdw11=<cdw11>] [--cdw12=<cdw12>] [--cdw13=<cdw13>]
[--cdw14=<cdw14>] [--cdw15=<cdw15>]
[--data-len=<data-len> | -l <data-len>]
[--metadata-len=<len> | -m <len>]
[--read | -r ] [--write | -w]
[--input-file=<file> | -f <file>]
[--timeout=<to> | -t <to>]
[--show-command | --dry-run | -s]
[--raw-binary | -b]

DESCRIPTION

Submits an arbitrary NVMe IO command and returns the applicable results. This may be the
simply the command’s result and status, or may also include a buffer if the command
returns one. This command does no interpretation of the opcodes or options.

The <device> parameter is mandatory and may be either the NVMe character device (ex:
/dev/nvme0), or a namespace block device (ex: /dev/nvme0n1).

On success, the returned structure (if applicable) may be returned in one of several ways
depending on the option flags; the structure may printed by the program as a hex dump, or
may be returned as a raw buffer printed to stdout for another program to parse.

OPTIONS

-o <opcode>, --opcode=<opcode>
The NVMe opcode to send to the device in the command

-f <flags>, --flags=<flags>
The NVMe command flags to send to the device in the command

-R <rsvd>, --rsvd=<rsvd>
The value for the reserved field in the command.

-n <nsid>, --namespace-id=<nsid>
The value for the ns-id in the command. Defaults to 0.

--cdw[2-3,10-15]=<cdw>
Specifies the command dword value for that specified entry in the command

-r, --read, -w, --write
Used for the data-direction for the command and required for commands
sending/receiving data. Don’t use both read and write at the same time.

-i <file>, --input-file=<file>
If the command is a data-out (write) command, use this file to fill the buffer sent to
the device. If no file is given, assumed to use STDIN.

-l <data-len>, --data-len=<data-len>
The data length for the buffer used for this command.

-m <data-len>, --metadata-len=<data-len>
The metadata length for the buffer used for this command.

-s, --show-cmd
Print out the command to be sent.

-d, --dry-run
Do not actually send the command.

-b, --raw-binary
Print the raw returned buffer to stdout if the command returns data or a structure.

EXAMPLES

nvme io-passthru /dev/nvme0n1 --opcode=2 --namespace-id=1 --data-len=4096 --read --cdw10=0
--cdw11=0 --cdw12=0x70000 --raw-binary

NVME

Part of the nvme-user suite

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