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NVME-IO-PASSTHRU(1) NVMe Manual NVME-IO-PASSTHRU(1) 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> | -n <nsid>] [--cdw2=<cdw2> | -2 <cdw2>] [--cdw3=<cdw3> | -3 <cdw3>] [--cdw10=<cdw10> | -4 <cdw10>] [--cdw11=<cdw11> | -5 <cdw11>] [--cdw12=<cdw12> | -6 <cdw12>] [--cdw13=<cdw13> | -7 <cdw13>] [--cdw14=<cdw14> | -8 <cdw14>] [--cdw15=<cdw15> | -9 <cdw15>] [--data-len=<data-len> | -l <data-len>] [--metadata-len=<len> | -m <len>] [--read | -r] [--write | -w] [--input-file=<file> | -i <file>] [--metadata=<file> | -M <file>] [--timeout=<timeout> | -t <timeout>] [--show-command | -s] [--dry-run | -d] [--raw-binary | -b] [--prefill=<prefill> | -p <prefill>] [--latency | -T] [--output-format=<fmt> | -o <fmt>] [--verbose | -v] 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. -[2-9] <cdw>, --cdw[2-3,10-15]=<cdw> Specifies the command dword value for that specified entry in the com- mand -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. If the command is a data-in (read) command, the data returned from the device will be saved here. -M <file>, --metadata=<file> If the command is a data-out (write) command, use this file to fill the metadata buffer sent to the device. If no file is given, assumed to use STDIN. If the command is a data-in (read) command, the metadata re- turned from the device will be saved here. -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. If want to use --dry-run option, --show-cmd option must be set. Otherwise --dry-run option will be ig- nored. -b, --raw-binary Print the raw returned buffer to stdout if the command returns data or a structure. -p <prefill>, --prefill <prefill> Prefill the buffer with a predetermined byte value. Defaults to 0. This may be useful if the data you are writing is shorter than the required buffer, and you need to pad it with a known value. It may also be use- ful if you need to confirm if a device is overwriting a buffer on a data-in command. -T, --latency Print out the latency the IOCTL took (in us). -o <fmt>, --output-format=<fmt> Set the reporting format to normal, json or binary. Only one output format can be used at a time. -v, --verbose Increase the information detail in the output. -t <timeout>, --timeout=<timeout> Override default timeout value. In milliseconds. 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 NVMe 10/31/2024 NVME-IO-PASSTHRU(1)
NAME | SYNOPSIS | DESCRIPTION | OPTIONS | EXAMPLES | NVME
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