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39 lines
1.8 KiB
Groff
39 lines
1.8 KiB
Groff
.Dd December 18, 2025
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.Dt SCSIMON 1
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.Os PiSCSI
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.Sh NAME
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.Nm scsimon
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.Nd Acts as a data capture tool for all traffic on the SCSI bus. Data is stored in a Value Change Dump (VCD) file.
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.Sh SYNOPSIS
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.Nm
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.Op Fl i Ar input_file_json
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.Op Fl b Ar buffer_size
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.Op Ar output_file
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.Sh DESCRIPTION
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.Nm
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monitors all of the traffic on the SCSI bus, using a PiSCSI device. The data is cached in memory while the tool is running. A circular buffer is used so that only the most recent transactions are stored, with a default size of 1,000,000 unless overridden by the -b option. The tool will continue to run until the user presses CTRL-C, or the process receives a SIGINT signal.
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.Pp
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If the -i option is specified, scsimon will parse the provided JSON file instead of capturing new data. If -i option is not specified, scsimon will read the GPIO pins.
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.Pp
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The logged data is stored in files with the base name specified by output_file, or "log" if not specified. The appropriate file extension (e.g., .json or .vcd) will be appended.
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.Pp
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To quit scsimon, press Control + C.
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.Sh OPTIONS
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.Fl i Ar input_file_json
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scsimon will parse the json file instead of capturing new data. If -i option is not specified, scsimon will read the gpio pins.
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.Fl b Ar buffer_size
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Override the default buffer size of 1000000.
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.Ar output_file
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Base name of the output files. The file extension (ex: .json) will be appended to this file name.
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.Sh EXAMPLES
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Make sure you've stopped the piscsi service. Then launch scsimon to capture all SCSI traffic available to the PiSCSI hardware:
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.Dl Nm scsimon
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.Pp
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If you're trying to capture a specific scenario, you'll want to wait to start scsimon until immediately before the scenario.
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.Sh SEE ALSO
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.Xr scsictl 1 ,
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.Xr piscsi 1 ,
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.Xr scsidump 1
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.Pp
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Full documentation is available at: <https://www.piscsi.com>
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