minh0204 Posted July 3, 2017 Share #1 Posted July 3, 2017 Advertisement (gone after registration) I'm not sure if this is documented anywhere, but if I remove the battery when the camera is on (switch at S, C or timer position) then the card will be formatted. I wonder if anyone observes the same? Quote Link to post Share on other sites More sharing options...
Advertisement Posted July 3, 2017 Posted July 3, 2017 Hi minh0204, Take a look here Issue: M 240 format cards when swapping battery. I'm sure you'll find what you were looking for!
Exodies Posted July 3, 2017 Share #2 Posted July 3, 2017 Do you mean it will be formatted when you put the battery back in? Quote Link to post Share on other sites More sharing options...
lct Posted July 3, 2017 Share #3 Posted July 3, 2017 (edited) The card cannot be formatted when the battery is removed i guess but putting the battery back in should not trigger the formatting process IMHO. Better switch off the camera before removing the bottom plate anyway. Edited July 3, 2017 by lct Quote Link to post Share on other sites More sharing options...
pop Posted July 3, 2017 Share #4 Posted July 3, 2017 If you remove the battery while the camera is writing to the card, you may damage the formatting of the card in a way which may make it appear unformatted. Switching the camera on when an unformatted card is mounted might have unpredictable effects. 1 Quote Link to post Share on other sites More sharing options...
Steve Ricoh Posted July 4, 2017 Share #5 Posted July 4, 2017 It's advisable to have computer cameras in a known state prior to removing power. Quote Link to post Share on other sites More sharing options...
jaapv Posted July 4, 2017 Share #6 Posted July 4, 2017 Whatever else, I cannot replicate this, not even when I pull the battery with the camera writing an image. Quote Link to post Share on other sites More sharing options...
minh0204 Posted July 4, 2017 Author Share #7 Posted July 4, 2017 (edited) Advertisement (gone after registration) This is what I did:1, take a photo, press "play" to confirm the photo is taken2, take off the base place, the warning message about base plate removal will show up 3, wait for the warning message to disappear. Press "play" again, the message will show up 4, pop out the battery 5, replace the battery and the base plate. Now all images will be gone!It happens almost randomly, but did happen to me twice, once during a shoot and I had to use another card while running recovery software on the faulty card. Not sure if it's the camera or the card, hence I'm checking here to see if anyone has the same issue. Edited July 4, 2017 by minh0204 Quote Link to post Share on other sites More sharing options...
lct Posted July 4, 2017 Share #8 Posted July 4, 2017 Why pressing "play" twice if you intend to remove the battery? Makes little sense with all due respect. Now i did those curious things four times and neither formatting nor erasing happened in any way i must say... Quote Link to post Share on other sites More sharing options...
mikemgb Posted July 4, 2017 Share #9 Posted July 4, 2017 I have wonder why you use this particular sequence when removing the battery. Why not just do what you are supposed to do and turn off the camera before removing the battery? That would solve all your problems. Quote Link to post Share on other sites More sharing options...
jaapv Posted July 4, 2017 Share #10 Posted July 4, 2017 This is what I did: 1, take a photo, press "play" to confirm the photo is taken 2, take off the base place, the warning message about base plate removal will show up 3, wait for the warning message to disappear. Press "play" again, the message will show up 4, pop out the battery 5, replace the battery and the base plate. Now all images will be gone! It happens almost randomly, but did happen to me twice, once during a shoot and I had to use another card while running recovery software on the faulty card. Not sure if it's the camera or the card, hence I'm checking here to see if anyone has the same issue. I find this a strange way to change batteries. Just switch off, replace battery, and shoot. I think there is nothing wrong with either card or camera, but you managed to corrupt the data by this strange sequence. Quote Link to post Share on other sites More sharing options...
pop Posted July 4, 2017 Share #11 Posted July 4, 2017 This is what I did: 1, take a photo, press "play" to confirm the photo is taken 2, take off the base place, the warning message about base plate removal will show up 3, wait for the warning message to disappear. Press "play" again, the message will show up 4, pop out the battery 5, replace the battery and the base plate. Now all images will be gone! It happens almost randomly, but did happen to me twice, once during a shoot and I had to use another card while running recovery software on the faulty card. Not sure if it's the camera or the card, hence I'm checking here to see if anyone has the same issue. Yes, and if you take a photograph while the lens cap is on the lens, you will get a dark frame, and if you smash the camera to the ground, you may break something. Such is life. Quote Link to post Share on other sites More sharing options...
minh0204 Posted July 4, 2017 Author Share #12 Posted July 4, 2017 Yes, and if you take a photograph while the lens cap is on the lens, you will get a dark frame, and if you smash the camera to the ground, you may break something. Such is life. Of course I don't always change the battery in this sequence; sometimes I even remember to remove the lens cap before taking a photo as well The point is, if the "play" button is pressed by accident before you change the battery, it's possible to corrupt the card. Just want to point it out and hopefully help someone if they have the same problem. Quote Link to post Share on other sites More sharing options...
lct Posted July 4, 2017 Share #13 Posted July 4, 2017 [...] The point is, if the "play" button is pressed by accident before you change the battery, it's possible to corrupt the card. [...] Never heard about that so far and i could not replicate your issue. I would show my camera to a good workshop if i were you and i would refrain from removing the base plate when the camera is on anyway. FWIW . Quote Link to post Share on other sites More sharing options...
pop Posted July 4, 2017 Share #14 Posted July 4, 2017 Of course I don't always change the battery in this sequence; sometimes I even remember to remove the lens cap before taking a photo as well The point is, if the "play" button is pressed by accident before you change the battery, it's possible to corrupt the card. Just want to point it out and hopefully help someone if they have the same problem. The issue is not the play button. The issue is removing the battery or the card while the camera is using the card. As long as you do that, you run the risk of damaging your files. It's the same with every device which records data to any medium. 4 Quote Link to post Share on other sites More sharing options...
Exodies Posted July 5, 2017 Share #15 Posted July 5, 2017 Reading an SD card may also result in write operations. So even if you use Play and remove the battery, the card could become corrupt. See http://www.tech-faq.com/flash-memory.html Read Disturb Limitation The primary method to read memory on NAND-styled flash memory has been known to cause cells in nearby memory blocks to become programmed or to change over time. This phenomena is known as “read disturb.” In order to avoid this issue, the flash chip controller will normally keep track or count the total number of reads to a memory block since the last time it was erased. Once the designed limit is reached, this block is copied to a new block and then erased and released to the memory block pool. Once this occurs, the original data block is considered ready to use again. If this work-around is not employed in time; however, the read disturb error will happen and there can be data loss as a result. 2 Quote Link to post Share on other sites More sharing options...
pop Posted July 5, 2017 Share #16 Posted July 5, 2017 Reading an SD card may also result in write operations. I didn't know that. I thought that write operations for reading were gone with the magnetic core memories. Quote Link to post Share on other sites More sharing options...
Frase Posted July 5, 2017 Share #17 Posted July 5, 2017 (edited) As already said its not formatting the card its just corrupting the images, taking batteries in and out of cameras with out switching off can do funny things! Edited July 5, 2017 by Frase Quote Link to post Share on other sites More sharing options...
sblutter Posted July 15, 2017 Share #18 Posted July 15, 2017 The rule, "I wont do that again" should fix the problem Quote Link to post Share on other sites More sharing options...
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