This program reads out the health data of some industrial grade SD Cards. Unfortunately there is no standard way of doing this. Sdmon uses CMD56 of the SD card specification and currently does this for:
- Apacer Industrial SD Cards, and some others from branded distributors
- SanDisk Industrial SD Cards (code contributed by William Croft)
Although some of the above cards have been tested, there is no guarantee that a particular card of the above manufacturers will work.
The output of the program is JSON so that it can be parsed easier in applications using sdmon.
For available versions see releases. Choose the correct archive for your os, i.e. sdmon-arm64.tar.gz for raspberry pi os 64bit or sdmon-armv7.tar.gz raspberry pi os 32bit.
Adjust the path to the desired version by replacing v0.2.0 in the below example with the desired one.
curl -L https://github.com/Ognian/sdmon/releases/download/v0.2.0/sdmon-arm64.tar.gz | tar zxf -
The latest development release may be also available.
curl -L https://github.com/Ognian/sdmon/releases/download/latest/sdmon-arm64.tar.gz | tar zxf -
The executable is statically linked, therefor it should work without any dependencies.
On a raspberry pi:
sudo ./sdmon /dev/mmcblk0
This is the output when the card doesn't support health status:
sudo ./sdmon /dev/mmcblk0
{
"version": "v.0.01-dirty (314f9dc)",
"date": "2022-04-07T16:18:24.000Z",
"device":"/dev/mmcblk0",
"idata.response[]":"0x900 0x00 0x00 0x00",
"error1":"1st CMD56 CALL FAILED: Operation timed out",
"error2":"2nd CMD56 CALL FAILED: Operation timed out"
}
Apacer Industrial micro SD card (99.97% healthy):
{
"version": "v0.3.2-dirty (262e866)",
"date": "2022-04-14T11:23:48.000Z",
"device":"/dev/mmcblk0",
"read_via_cmd56_arg_1":"read successful but signature 0xff 0xff"
"idata.response[]":"0x900 0x00 0x00 0x00",
"flashId": ["0x98","0x3c","0x98","0xb3","0x76","0x72","0x08","0x0e","0x00"],
"icVersion": ["0x1f","0xc3"],
"fwVersion": [83,201],
"ceNumber": "0x01",
"spareBlockCount": 46,
"initialBadBlockCount": 72,
"goodBlockRatePercent": 97.56,
"totalEraseCount": 1380,
"enduranceRemainLifePercent": 99.97,
"avgEraseCount": 1,
"minEraseCount": 1,
"maxEraseCount": 5,
"powerUpCount": 55,
"abnormalPowerOffCount": 0,
"totalRefreshCount": 0,
"productMarker": ["0x00","0x00","0x00","0x00","0x00","0x00","0x00","0x00"],
"laterBadBlockCount": 0,
"success":true
}
Sandisk Industrial SD card (99% healthy)
sudo ./sdmon /dev/mmcblk0
{
"version": "v0.3.2-3 (a04b618) arm64",
"date": "2022-04-14T08:27:15.000Z",
"device":"/dev/mmcblk0",
"signature":"0x44 0x53",
"SanDisk":"true",
"manufactureYYMMDD": "211122",
"healthStatusPercentUsed": 1,
"featureRevision": "0x1f",
"generationIdentifier": 5,
"productString": "SanDisk ",
"success":true
}
(c) 2018 - today, OGI-IT, Ognian Tschakalov and contributors, released under GNU GPL v2