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Active SD card health monitoring?


atomic77

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Hello all,

 

I've been recently burned by a failing SD card (armbianmonitor -v possibly saved me a much worse fate!) and I'm now trying to proactively avoid a similar situation.

 

I found that WD has a line of cards that claim a health status feature that  "Helps in preventive maintenance by signaling when the card needs to be replaced". One of them is the Purple QD101 that seems reasonably priced at $15 for 64GB.

 

I'm not finding much in the way of details of how this is exposed though. Is there any way to get access to this information on linux?

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Look into mmc-utils. This is the tool you want to use to interact with SD/MMC/eMMC devices. SD cards do not use SMART, you might have to dig a bit further to find out how to check their health status.

 

I found a doc from Micron that might be helpful: https://media-www.micron.com/-/media/client/global/documents/products/technical-note/sd-cards/tnsd02_enable_sd_health_monitor_system.pdf?rev=1fee627f3c974c139b3533bdd47a635f

 

Additionally, you must use a native mmc interface to interact with your card, such as MicroSD card slots that are directly attached to the SoC, a PCIe based card reader in your laptop, or a Realtek USB card reader that uses the "rtsx_usb" driver. The normal SCSI based card readers will not work.

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