Gremlins strike my HDW5231R-ZR Cameras

Discussion in 'Dahua' started by Gadget -X, Feb 11, 2019.

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  1. Gadget -X

    Gadget -X Getting comfortable

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    Gremlins have struck 6 of my 9 HDW5231R-ZE cameras. I check the SD cards once a month just as a pre-caution. When I checked them only 3 showed they had SD cards in them. I immediately checked the physical SD cards and they are in-place. I tried unplugging and replugging cameras which show no SD cards and still nothing. I tried setting back to default and still no glory. Before I go and take the cameras apart again to see if I can format and access the physical SD cards I wanted to check and see if anyone had this kind of issue before. I downloaded video from one that showed it had an SD card and all is well. These 6 cameras have worked solid for 8 months up till this months check.

    Good Grief !!

    M
     
  2. fenderman

    fenderman Staff Member

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    Where did you buy these cards? What brand?
     
  3. pozzello

    pozzello Getting comfortable

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    right. probably conterfit SD cards that don't have the advertised capacity.
    once the cam writes out beyond the real size, it's basically broken.

    pull one of the cards and test using some sort of storage tester that writes to reads from the card (takes some time depending on how big the card is).
    I've used H2testw in the past, but there are others...
    4 Tools to Test and Detect Fake or Counterfeit USB Flash Drives • Raymond.CC
     
  4. Gadget -X

    Gadget -X Getting comfortable

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    They worked fine for 6 months. They are not fake. Purchased from an authorized Sandisk Dealer. I am going to remove one tonight and put a spare in the camera. Will repost back. Tonight.

    M
     
  5. fenderman

    fenderman Staff Member

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    What size? Are they continuously writing?
     
  6. Gadget -X

    Gadget -X Getting comfortable

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    Hey Fenderman. They are all Sandisk 128GB Ultras and they are continually writing, They last abut 3 1/2 days before they start deleting. All purchased in April 2018. I had Ultra in my previous Vivoteks and they continually wrote for 6 years with out issue.

    M
     
  7. Gadget -X

    Gadget -X Getting comfortable

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    I just verified and the SD card is INOP. I replaced it with a spare and it is clicking along just fine. The INOP card does not come up in Disk Utility. Something seems real peculiar about 7 of 11 cards I purchased on May 14, 2018 go bad within a few days... Gremlins !!

    We will see what Sandisk has to say. They have always taken good care of me.

    M
     
  8. pozzello

    pozzello Getting comfortable

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    that is odd. do you get much lightning where you live?
     
  9. Gadget -X

    Gadget -X Getting comfortable

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    Nope no lightning, have not even had power go out this year.

    M
     
  10. tangent

    tangent IPCT Contributor

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    mat200 likes this.
  11. Gadget -X

    Gadget -X Getting comfortable

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    Thanks for the reply and link. Wow I can say I was a naive about the life of SD cards. I think that was because I had used the Ultra in my vivotek cameras without failure for 6 years. Being much lower resolution they never showed any signs of failure. The new Dahua cameras I have are much higher resolution. Is there a good study that any members know about for Micro SD 128GB cards in modern day high resolution security cameras? I found some info on dash cam type saying the Samsung Endurance was good, most said the Tanscend High Endurance was the best (at more than 2 times the price).

    Live and learn !! Thank you !

    M
     
  12. fenderman

    fenderman Staff Member

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    remember its not the resolution but the bitrate.
     
  13. Gadget -X

    Gadget -X Getting comfortable

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    Thanks FenderMan. What bitrate would you suggest for recording to SD card?

    M
     
  14. Gadget -X

    Gadget -X Getting comfortable

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    Well long story short. Sandisk will not cover any SD Ultra used in a security Camera, voids warranty. Wants me to buy their high endurance, but it only comes in 64GB. Go figure it would have to work twice as hard... :). Think I settled in on Tangent's recommendation Samsung Endurance. Probably going to buy directly from them as the price is the same. Studying the "Limited" 5 year warranty.

    M
     
  15. Rksgrd

    Rksgrd Getting the hang of it

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    They all want you to buy the endurance versions. People have reported good luck in the dashcam forums with the A1 marked non-endurance Sandisk cards.
     
  16. Gadget -X

    Gadget -X Getting comfortable

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    Well I can report 6 of 9 failures with the ones that have A1 marked. :)

    M

    Scan 6.jpeg
     
  17. Rksgrd

    Rksgrd Getting the hang of it

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    Yikes. Well there goes that.
     
  18. tangent

    tangent IPCT Contributor

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    Some reading:
    MacOS X - Flash Tester
    Dahua best microSD cards - suggestions?
    DS-2CD2542FWD-IWS just stopped recording to SD card - can't figure out why?

     
  19. J Sigmo

    J Sigmo Known around here

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    There's still a place for battery backed CMOS RAM these days. Even the best flash has a limited write life. The industrial controllers I often use have battery backed RAM for persistent variables and various flags, Flash for program storage, and volatile RAM for operation. The newer ones use small (coin-cell sized) rechargeable lithium-ion batteries to support the CMOS RAM, and you get around 1 year of retention time during power failures (that's a LONG power failure) and the batteries themselves last around 7 years. I know it would add cost, but if these cameras are going to hammer the flash memory that hard, perhaps they should offer a BBRAM option for, perhaps, $20 more per camera.
     
  20. fenderman

    fenderman Staff Member

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    Removable media allows retrieval of footage even if the camera is dead. Setup properly you'll get a few years out of an sd card. No need to constanly hammer it with continuous writing.