Mark Knecht wrote: > On Wed, Dec 29, 2021 at 10:14 AM Dale <rdalek1...@gmail.com> wrote: >> Mark Knecht wrote: >>> <SNIP> >>>> So while rare, it's not just me. ;-) I've had cards fail by just plain >>>> refusing not to mount at all, mounting read only and such. I've never >>>> had one to fail like this tho. I guess if this was some sort of >>>> sensitive files, I'd have to put it in a shredder or take a pair of >>>> scissors to it. LOL >>>> >>>> I ordered 6 new cards as replacements. They came in yesterday. Like I >>>> said, I wouldn't trust that card even if it started working again. So, >>>> off to the trash the weird card goes. Now I just have to wonder why dd >>>> and such didn't report problems. :/ >>>> >>>> Thanks to all for the info. Interesting. >>>> >>>> Dale >>>> >>>> :-) :-) >>>> >>> Actually, it's possible that it failed this way by design. What if the >>> card recognized that it's in some sort of a wear out condition and >>> just shut off new writes? One might see it as a failure but a >>> different view is as a potential opportunity to retrieve data before >>> it's gone. >>> >>> You might want to check out this tool: >>> >>> https://github.com/BertoldVdb/sdtool >>> >>> which advertises that it can view, set and reset the write protection >>> status of an SD card. Can't hurt if you're committed to throwing the >>> device in the trash can anyway. (Well, it could possibly hose your >>> system if you use it incorrectly or if it has bugs, but that's true >>> about all software, right?) ;-) >>> >>> But at least you could view the status of the card. >>> >>> Cheers, >>> Mark >>> >>> >> >> I downloaded sdtool but I don't have the required devices in /dev to use >> it. In the readme it says not to use /dev/sd* but to use /dev/mmcblk*. >> It seems my card reader doesn't connect in a way for those to be >> created. Would have been nice just to see what it does tho. I still >> wouldn't trust it of course but being curious . . . . >> >> By the way, the card is a Sandisk which has a fairly good reputation. >> It is possible that it failed in the best way it could. On the positive >> side, it did fail in a way that the files could be recovered. That's >> always a good thing. It's certainly better than failing with no way to >> get the files. >> >> Dale > OK, sorry it's not easy. I suppose now that you are using some sort of > USB bridge for reading your SD cards? That probably makes it show up > as a standard /dev/sd device like other USB drives. > > I may be wrong, and it might not help you, but I think /dev/mmc is > enabled through the MMC_BLOCK option in the kernel, but even if you > enable that it may not change things if you have a USB bridge in the > way. > > On Windows there are some partition editors that show the state of > these bits. I haven't looked for a standard Linux partition editor > that does that but it's probably out there somewhere if you go > hunting. > > If you own a DSLR that supports whatever size SD card you are using > then it probably has a way to write protect cards while in the camera. > However if it's just a web cam that you're using it probably doesn't > but check the documentation. > > Good luck, > Mark > >
Those deer trail cameras are somewhat cheap, ish. Some of them don't even have a format option. I have a old camera that the IR sensor doesn't work on, it never knows something is there to take pictures of so it does nothing. Anyway, I use it to format cards with since most all trail cameras use the same format type and directory tree. One partition and vfat. Basically, it is really simple and not a lot of options. I use a card reader that hooks up via USB. It's one of those multi reader thingys. It's been a pretty good one but it isn't a real expensive one either. Given I got the data off and plan to trash it anyway, it's not worth recompiling a kernel, rebooting and then hoping it will have the right device thingys. This thread has been interesting tho. At least I know that a Sandisk card at least tries to fail in a way that I can get the data off that did get written to the card. Hey, that's a lot better than some I guess. :-D I've had some other brands that when they die, they dead. You get nothing at all. Dale :-) :-)
