cardreader SanDisk ImageMate All-In-One SDDR-289
Read/Write spead with usual cardreader added to old post
Tag: sandisk
Reading some old posts:
SanDisk Extreme 30 MB/s SD Card
SanDisk SDDR-199
SD Cards test with SDDR-1999
Now I know what was wrong with 30MB/s SanDisk Extreme SD cards. 30 MB/s was not standard bus speed for SD. So it is seems like only (one?) card reader from SanDisk was supporting that speed. And it was not a good idea to buy 30MB/s cards. Actually theoretical maximum speed for normal and high speed SD cards was 12.5 MB/s and 25MB/s (read as 10MB/s and 20 MB/s in real life). And, by the way, USB 2.0 (480 Mbit/s) has reallife speed for cardreader/hdd/etc ~ 30 MB/s at maximum.
New SD card standards are UHS-1 with 50 MB/s and 100 MB/s (read as 45 MB/s and 90 MB/s) and UHS-II with 156 MB/s and 312 MB/s.
So now some examples of UHS-1 standard in use:
SanDisk ImageMate SDDR-289 (USB 3.0)
SanDisk 16 GB UHS-1 45MB/s
USB 2.0 is not enough to get 45+ MB/s that is why UHS-* cardreaders must be USB 3.0 or other modern high speed interface.
Card formated to exFAT. Cardreaders setting “optimized for performance” in Windows 7.
| USB | Reader | Card | Read MB/s | Write MB/s |
|---|---|---|---|---|
| USB 3.0 | UHS-1 | UHS-1 45MB/s | 39MB/s | 24MB/s |
| USB 2.0 | UHS-1 | UHS-1 45MB/s | 26MB/s | 16MB/s |
| USB 2.0 | non UHS-1 | UHS-1 45MB/s | 18MB/s | 14MB/s |
Card Formatted to FAT32 by SD Formatter 3.1
| USB | Reader | Card | Read MB/s | Write MB/s |
|---|---|---|---|---|
| USB 3.0 | UHS-1 | UHS-1 45MB/s | 36MB/s | 32MB/s |
| USB 2.0 | UHS-1 | UHS-1 45MB/s | 25MB/s | 20MB/s |
| USB 2.0 | non UHS-1 | UHS-1 45MB/s | 18MB/s | 17MB/s |
speed tested with Flash Memory Toolkit “File Transfer (5MB)”
Купил новую SD карточку SanDisk SDHC Extreme 30MB/s* 16GB class 10 и решил сравнить ее скорость с другим карточками.
т.к. результат оказался неожиданным, я перепроверил скорости всех своих кардридеров.
Transcent M3, Sandisk MicroMate, Apacer (APAM250B) показывают одинокувую скорость, китайский же SIYOTEAM медленее остальных на 1-2 МБ/с.
Дальше тестировалось с использованием только Sandisk MicroMate.
Тест “Мелкие файлы” это 1916 файлов в 717 папках общим размером 21.8 МБ.
Тест “Большой файл” это образ диска размером 3.7 ГБ для карт 4ГБ и более.
| Card | Read (MB/s) large file | Write (MB/s) large file | Read (MB/s) small files | Write (MB/s) small files | Delete (1/sec) |
| SanDisk SD 1GB | 10.2 | 4.8 | 2.3 | 0.1 | 39 |
| SanDisk SDHC Extreme III 4GB class 6 | 19.0 | 16.5 | 1.8 | 0.3 | 57 |
| Apacer SDHC 8GB class 6 | 18.9 | 6.4 | 1.9 | 0.2 | 25 |
| Transcend SDHC 8GB class 6 | 16.5 | 10.5 | 2.3 | 0.2 | 61 |
| SanDisk SDHC Extreme 30MB/s* 16GB class 10 | 19.0 | 17.7 | 2.1 | 0.1 | 32 |
что б снять подозрение в том, что все уперлось в производительность USB 2.0
| Device | Read (MB/s) large file | Write (MB/s) large file | Read (MB/s) small files | Write (MB/s) small files | Delete (1/sec) |
| Kingston DataTreveler G2 16GB | 21.5 | 16.1 | 3.0 | 0.2 | 69 |
| WD Passport 500GB | 34.5 | 29.2 | 3.0 | 1.0 | 651 |
результаты работы Flash Memory Toolkit (15MB files)
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