/dev/mmcblk0 gone after running sdmon with Transcend Ultimate 16 GB

[ds-tobiaskr]

Hi,
when I run sdmon with a Transcend Ultimate 16 GB I get some non useful results,
but after this the entry /dev/mmcblk0 is gone.
So on the the second run I get a "not found" error.

This happens on Raspberry Pi 2 running Alpine 6.3.2

{
"version": "v0.9.0 (4dff9b6) armv7",
"date": "2026-01-16T08:57:48.000",
"device":"/dev/mmcblk0",
"addTime": "false",
"read_via_cmd56_arg_1":"read successful but signature 0x0 0x0",
"idata.response[]":"0x00 0x00 0x00 0x00",
"flashId": ["0x00","0x00","0x00","0x00","0x00","0x00","0x00","0x00","0x00"],
"icVersion": ["0x00","0x00"],
"fwVersion": [00,00],
"ceNumber": "0x00",
"spareBlockCount": 0,
"initialBadBlockCount": 0,
"goodBlockRatePercent": 0.00,
"totalEraseCount": 0,
"enduranceRemainLifePercent": 0.00,
"avgEraseCount": 0,
"minEraseCount": 0,
"maxEraseCount": 0,
"powerUpCount": 0,
"abnormalPowerOffCount": 0,
"totalRefreshCount": 0,
"productMarker": ["0x00","0x00","0x00","0x00","0x00","0x00","0x00","0x00"],
"laterBadBlockCount": 0,
"success":true
}

[Ognian]

Hi,
unfortunately this means that the linux sd card kernel driver failed; the reason for failing is that cmd56 doesn't return anything.
Actually the kernel driver shouldn't behave that way, but this happens...