Re: [tlug] micro sdhc card recovery

["Curt J. Sampson" <cjs@example.com>]

On 2024-09-13 16:06 +0900 (Fri), Edward Middleton wrote:

> Does anyone have trick for recovering a dead microsd card I was using in
> a raspberry pi.  When inserting the card the light on the reader flashes
> but the card is not recognized and no block devices are created.
>
> I have tested the card with other working sdcards and they are recognized
> so I don't think its the reader.

Well, you should definitely pull any important data off it using another
reader.

It's always worth trying a reformat with the officical [SD Card Association
formatting tool][formatting]. Embedded code (such as that in the Pi boot
ROMs) can be notoriously fussy about the particular way the card was
formatted.

[formatting]: https://www.sdcard.org/downloads/formatter/

On 2024-09-13 16:49 +0900 (Fri), Chris Salisbury wrote:

> The raspberry pi thing got me thinking about worn out sd cards, but one
> unrelated thing I've had success with in the past is sandpaper on the
> contacts -- they can oxidize such that they don't get a good connection.

I suggest first trying a [contact cleaner], and then a pencil eraser.
Sandpaper is likely to take off a little more metal than you would care
for.

[contact cleaner]: https://www.amazon.co.jp/-/en/3012-HTRC2-1-Electronics-Cleaner-Electronic/dp/B004XKR5GA/

cjs
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Curt J. Sampson      <cjs@example.com>      +81 90 7737 2974

To iterate is human, to recurse divine.
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