In simple terms, you need to copy the required data, / etc / config / fstab, reboot three steps. After that, you should be able to see the results list by mounting: If successful, SD card will be mounted as / overlay, otherwise they will be mounted as / tmp / overlay-disable. If you have a complete copy of the data is determined to restart once, anyway the sd card mount / dev / sda1 really looked uncomfortable ah. If you just need software installed to sd card, then select the Configuration tab in LuCI package manager, and then add a dest sd <path / to / sd>, the corresponding path for the sd card mount point, and then compile // etc / profile, the bin sd card, sbin, usr / bin, usr / sbin in your PATH variable, lib, usr / lib added LD_LIBRARY_PATH variables, such as other / etc ah / www ah would be a symbolic link on the sd card Enough. Install the software to use opkg -d sd install <package name>.
Correct! Whether machinery such as hard disks, the density the higher the density, the greater the amount of data storage, but now will do 3.5-inch data density close to 2TB, 4TB certainly two or three disc body was possible, but because of the hard thick, You can plug two multi-disc to increase capacity, flash memory is actually a class reason, the higher the process technology, the greater the theoretical density, the greater capacity, but there is a different, usually, in the flash memory as storage use, there are three commonly used grades, SLC MLC TLC, SLC expensive, generic process technology his longest life expectancy, the smallest capacity, MLC two compromise, TLC shortest life expectancy, the largest capacity, generally low-end card U disk TF SD, etc. are TLC, MLC used for general SSD, high-end storage typically used SLC. So the price is not the same.
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