32GB uSD card problems

Discussion in 'Android General Discussions' started by Se7enLC, Jul 29, 2010.

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  1. Se7enLC
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    Se7enLC Active Member

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    I just got a 32GB uSD card (SanDisk, from Verizon). Seems to work fine, except that after I unmount it, my phone reboots. Seems reproducable, too. The data is all there and works fine, but the phone reboots when it tries to remount the card after mounting it on the PC. Anybody else with a 32GB card experience this? I am running Froyo (CyanogenMod 6.0RC1)
  2. dolpns13
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    dolpns13 Member

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    Thats odd... Ive never heard of this issue. My phone doesnt reboot when I unmount
  3. Se7enLC
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    Se7enLC Active Member

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    Do you have a 32gb card, or the standard 16gb?
  4. ChugIt
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    ChugIt Member

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    I never had this issue (yes 32GB).
    Bump for replies in case I ever do.
  5. CatFishDom
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    CatFishDom Member

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    Mught be the custom rom. I have had this problem when I had a custom rom on my droid.
  6. Se7enLC
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    Se7enLC Active Member

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    Agreed - it could be an issue that is specific to CM6RC1, so I posted in that forum as well. I figured switching to a 32gb card was uncommon enough that it could potentially be an issue for even stock droids - was worth confirming that it works fine for people.
  7. dolpns13
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    dolpns13 Member

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    I have the 16GB
  8. ndoren
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    ndoren Member

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    It's not your custom ROM.

    Mine does it too. Stock FroYo OTA ROM, build FRG01B. 32Gb card is the Sandisk sold by Verizon. So it's not your custom Cyanogen ROM. I run a stock 2.2 ROM.

    The phone reboots once while mounting the card during power-up. Thus, in effect it reboots twice when you power on, then works normally. The phone also reboots when unmounting the phone memory from a PC via USB, then works normally. I went back to the stock 16Gb flash chip and all is normal again.
  9. harrellj
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    harrellj Active Member

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    Odd question, but was the card formatted before use?
  10. searayman
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    searayman Member

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    for somone looking to buy a 32 gig card what is formating it mean and what should I do before I install it?
  11. ndoren
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    ndoren Member

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    If you buy Verizon's Sandisk card, it's preformatted. Since it caused unwanted reboots, I formatted it again via the Droid's built-in formatting utility. Reboots continued. So, the formatting didn't seem to matter.
  12. ilikemoneygreen
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    ilikemoneygreen Silver Member

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    Take the card back to verizon and be like wtf? Show them the problem, and compare it to the 16gb card to show that reboots are a problem.
  13. ndoren
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    ndoren Member

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    I ordered the card via the website (with free overnight shipping) so returning it isn't quite as easy as taking it back to the store. I know others are having this problem so I'm not yet convinced it's a card defect issue. I do notice that the card is SLOW. I'm going to run some speed tests on it.. it's obviously not the class 4 (or better) speed that came with the Droid originally. The Droid reboots while it's mounting the card... it's almost as if the card is too slow to mount and something 'times out' within the Droid OS and resets before the card is mounted.
  14. garrett
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    garrett Silver Member Theme Developer Developer

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    anything bought online from verizon can be returned/exchanged in the store.


    Myself and my girlfriend both have had 32 gig cards for about 3 months now and havent had a single issue. Were both running custom roms.

    we did not get them from verizon they were bought directly from sandisk's website.
  15. ndoren
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    ndoren Member

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    Yeah it's the same card you bought... Verizon just adds their own branding to the package, and they've got it on sale for $99.

    I'm running the OTA update of froyo but I'm rooted and overclocked.

    Here are some speed results:

    Original 'factory stock' 16Gb card - Read: 5 Mb/sec, Write: 4 Mb/sec
    original 16 Gb card -> class4

    New Sandisk 32Gb card - Read: 4 Mb/sec, Write: 2 Mb/sec
    new 32Gb card -> class2

    This doesn't necessarily have anything to do with my reboot issue... just an observation about the card's speed.
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