Testing of A Data 32 GB SDHC SD Flash Card

Testing / Review of ADATA SDHC Class 10 32 GB

Published in Testing and Reviews

ADATA SD Flash Card 32 GB Class 10 Test Drive

Today is the day when I am satisfied that SD Flash Card 32 GB by A-Data is totally bullshit! You can ask me why? Well the test results is confirmed my opinion.

 

Permit me to introduce my stupid mistake called ADATA SDHC Class 10 32 GB SD Flash Card. First of all I would like to tell about:

Sspecification of the class 10 standard

There is the information from WikipediA:

Secure Digital or (SD) is a non-volatile memory card format for use in portable devices. The Secure Digital standard is maintained by the SD Card Association (SDA). SD technologies have been implemented in more than 400 brands across dozens of product categories and more than 8,000 models.

Speed Class Rating

The SD Association defines standard speed classes indicating minimum performance to record video. These are defined in terms of suitability for different applications:

  • Class 2 for SD video recording
  • Class 4 and 6 for HD ~ Full HD video recording,
  • Class 10 for Full HD video recording and HD still consecutive recording
  • UHS Speed Class 1 for real-time broadcasts and large-size HD videos

The specification defines these classes in terms of performance curves which translate into the following minimum performance levels (on an empty card):

ClassMinimum performance
SDHC Speed Class 2.svg Class 2 2 MB/sec
SDHC Speed Class 4.svg Class 4 4 MB/sec
SDHC Speed Class 6.svg Class 6 6 MB/sec
SDHC Speed Class 10.svg Class 10 10 MB/sec

Speed Classes 2, 4, and 6 assert that the card supports the respective number of MB/sec as a minimum sustained write speed for a card in a fragmented state. Class 10 asserts that the card supports 10 MB/s as a minimum non-fragmented sequential write speed. By comparison, the older "?" rating measured maximum speed under ideal conditions, and was vague as to whether this was read speed or write speed.

ADATA SDHC 10 Class 32 GB SD Card Test Specification

I used very good utility by the authors of { Tooltip Title::HD Tune is a hard disk utility with many functions. It can be used to measure the drive's performance, scan for errors, check the health status (S.M.A.R.T.), securely erase all data and much more.}HD Tune{/} the name of it Flash Memory Toolkit.

The Flash Memory Toolkit includes the main 2 type of tests

  1. Low-Level Benchmark - This test can help to understand the Read / Write speed on all over the space of flash card.
  2. File Benchmark - This is very important test can help to realize what is the clear rate of small files Read/Write. The program can test copy / write procedure on 1/2/3/4 and 5 MB files.
  3. Error Scan Module - The Error Scan Module can help to check all surface of diagnosable flash card and after the end of test you can see any bad sectors of your card.

Also the program includes some specific very important features

  1. File Recovery Module - Do you remember the situation when you delete some files from your flash card as a mistake? This module can help to recover it, but very important to do recovery process as soon as possible and don't do any read / write procedure.
  2. Eraser Module - As you know all deleted files actually keep saving on you drive, but the reference about existence of this files deletes. This module erase all sectors on your drive where your file saved. Also you can erase all free space on your flash card. 
  3. Info Module - Can show you all hardware specification on your drive.

Testing of A-Data SDHC Class 10 Standart SD Card

First of all the hardware specification of ADATA SDHC Class 10 SD Card

Hardware Specification of A-Data SDHC 32GB Class 10 Standart SD Card

 

Specification from A-Data website

Capacity 8GB/16GB/32GB
Dimension (W x H x D)  24mm x 32mm x 2.1mm
Weight  2g
Operating Voltage  DC2.7~3.6V
Speed class  Speed (read) : 18~20 (MB/s)**

 Speed (write) : 13~16 (MB/s)**

 Speed Class : Class 10

Warranty  LifeTime warranty
Compatibility  Digital Camera / DSLR / Camcorder
Certifications  FCC , CE , BSMI , VCCI
Note  ** Based on HD Bench software testing

I don't know which kind of Benchmark they used, but my results was very different than numbers in this table...

The results of A-Data SDHC 10 Class Standard 32GB testing

This is result of Read error test:

Flash Memory Toolkit Error Read Speed Results of ADATA SDHC 10 Class 32 GB SD Flash Card

As you see the average read speed is only 4.0 MB/Sec and there is too slow for 10 Class Standard. There is new card and after some Read / Write Circles the speed will increased. You can see it on the next pictures.

This is result of Write Error test:

Flash Memory Toolkit Error Write Speed Results of ADATA SDHC 10 Class 32 GB SD Flash Card

 As you see recognize the average writing speed is only 2.7 MB/S it is really slow not only for 10 Class Standard, but for 6 Class too.

This is resume of Read / Write 1 - 5 MB Files Benchmark Test:

Flash Memory Toolkit File Benchmark Speed Results of ADATA SDHC 10 Class 32 GB SD Flash Card

As you see the speed of any files is too slow and for 10 Class Standard card this results is nothing. It means ADATA SDHC 32 Gb 10 Class Standart SD Card is fake and A-Data just cheat their clients.

This is Low Level Read Test:

Flash Memory Toolkit Low Level Read Speed Results of ADATA SDHC 10 Class 32 GB SD Flash Card

As I told before, after some period of time the read speed of flash card was increased. As you see in this test. And now the speed can correspond to Class 10 Standard, but the read speed not so important as a write speed.

This is Low Level Write Test:

Flash Memory Toolkit Low Level Write Speed Results of ADATA SDHC 10 Class 32 GB SD Flash Card

As you see the write test is too pour for 10 Class Flash Card it means the real standard of A-Data SDHC 32GB 10 Class SD Card is only Class 4 and A-Data Corporation just disinform their clients. And it is too sad.

The Resume of SDHC ADATA 32 Gb 10 Class SD Card is

Capacity 8GB/16GB/32GB
Dimension (W x H x D)  24mm x 32mm x 2.1mm
Weight  2g
Operating Voltage  DC2.7~3.6V
Speed class  Speed (read) : 18~20 (MB/s)** - ~12.4 (MB/s)

 Speed (write) : 13~16 (MB/s)** - ~4.9 (MB/s)

 Speed Class : Class 10 - Class 4

Warranty  LifeTime warranty
Compatibility  Digital Camera / DSLR / Camcorder the speed is too slow for using in this kind of devices
Certifications  FCC , CE , BSMI , VCCI
Note  ** Based on HD Bench software testing I don't know what is the test A-Data Used, but Flash Memory Toolkit shows totally different results!

PS: I bought this card in EBay and hope that I can take my money back because the price for this card include shipping is about 20$ and there is too high price for Class 4 SD Flash Card. Be careful if you see this SD Card in the PC Stores!

 

In conclusion I'd like to show small video about one guy who lost the most important episode in his video record, because the A-Data SDHC 16 MB Class 10 SD Card failed him.

 

 

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