How to judge SD card as 'good card' when employing SD card to monitor storage video? .TXT

You will find some SD cards available on the market that happen to be fake cards and inferior cards. When this SD card is made use of using a surveillance camera, a series of abnormalities like unformatable, unrecordable, or frequently unrecognized SD cards may take place, which may well avert regular monitoring. The editor of this article will introduce quite a few approaches to detect regardless of whether the SD card is a 'good card'.

What exactly is a fake card?

Fake cards are some companies who pretend to become genuine cards inside the form of falsification, use old ones to fill new ones, and subsume very good ones. how to recover deleted photos from hard disk and modify some facts inside the cards to attain the objective. Widespread counterfeit cards incorporate capacity falsification, old and new falsification, speed falsification, and so forth.

Capacity fraud (capacity expansion card):

For instance, a card that claims to have a capacity of 32G, but really only has a real capacity of 20G or reduced, as well as the rest is virtual (expanded) space. This type of card will lead to the total duration of video storage to become low or some videos may not be viewed correctly.

Speed ​​fraud (low speed card):

Video surveillance will be the continuous writing of high-definition high-definition images. This sort of low-speed card may have no challenge in storing ordinary files, but for video surveillance, there will likely be troubles for instance video loss as a consequence of too low a rate. This kind of card claims that it can realize a create speed of 10M/s, but in fact the write speed is extremely low, and the rate must be checked by testing software.

Bad card:

That is, the physical nature in the card is broken. For example, you can find some broken regions within the internal storage area of ​​the card that cannot study and write information ordinarily. The use of this kind of card may lead to abnormal phenomena which include unrecognized and unformatted.

The way to judge no matter whether your card is typical?

If you can find issues connected to the SD card prior to obtain or through use, it is recommended to detect by the following methods:

Insert the SD card in to the computer system through the card reader. If the SD card is also abnormal or unrecognizable around the laptop, it implies that the SD card has a higher probability of physical failure or perhaps a bad card.

Most genuine card makers have genuine anti-counterfeit codes on the cards. It can be encouraged to go straight for the official web page from the SD card manufacturer to check and confirm.

Reference costs and testimonials. Frequently speaking, SD cards 16G, 32G, 64G, 128G, and so on. correspond to a ladder value, the cost could fluctuate slightly but not also big. For example: the 32G card purchased only costs about 30 RMB, and the majority of the official retailer prices are around 50RMB, you need to pay focus to the efficiency and high quality in the card (the market price tag fluctuations are certainly not regarded here, just for reference).

Tested by the software program tool MydiskTest to confirm the SD card. Here we focus on the detection solutions and abnormal outcomes:

Detection approach: Take out the SD card and insert it into the card reader, and insert it into the laptop or computer USB interface;

Open the MydiskTest software program and pick the corresponding SD card for testing (pick the disk corresponding to the SD card in the test column);

Three tests are carried out respectively, as shown under:

Abnormal final results expansion test. The following guidelines are expansion cards:

Price test. Establish whether it is a low-speed card. Red indicates the writing speed. Observe no matter if the writing speed can exceed 10M/s in files of various sizes. The following figure shows that the write speed is extremely low, definitely less than 10M/s, that is a low-speed card:

Integrity testing. The data integrity check fails:

What SD card is advised for video surveillance?

Since the camera stores high-definition video and writes high-speed data towards the SD card at high speed, there's a requirement for the speed of writing towards the SD card. We suggest employing genuine Class 10 and above (C10) SD cards. The following table refers to Baidu Encyclopedia on SD card speed registration division and application scope:

Class10 identification technique is as follows, UHS-I/UHS-II could be applied.

For hard drive photo recovery , the reliability of the SD card must be assured. It truly is advisable to get the SD card from a flagship retailer or maybe a trusted channel.