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-   -   difference in booting speed from sd card and nand flash (http://www.linuxquestions.org/questions/linux-hardware-18/difference-in-booting-speed-from-sd-card-and-nand-flash-4175451352/)

ranjana kumari 02-23-2013 12:30 AM

difference in booting speed from sd card and nand flash
 
I have Target board with TMS320dm368 controller.
The board is taking few seconds more to boot from nand flash while the booting speed from sd card is fine...
Can anyone please suggest the reason behind this

TB0ne 02-24-2013 10:52 AM

Quote:

Originally Posted by ranjana kumari (Post 4897955)
I have Target board with TMS320dm368 controller.
The board is taking few seconds more to boot from nand flash while the booting speed from sd card is fine...
Can anyone please suggest the reason behind this

Yes...one is slower than the other. And did you try to look up the two, and find out the differences between them???

SD cards have processors in them that handle bad blocks, wear leveling, etc. If you choose NAND flash, your system needs to take care of these issues in some other way, making them slower.

Shadow_7 02-24-2013 12:17 PM

Flash has read/write speeds that vary greatly. And are generally way slower than the harddrives that we are used to using. That's why things like SDHC cards have class ratings that help signify their write speeds. You can do things to minimize the file I/O at boot, which can greaty increase boot times. Or you can configure and use the hibernate, suspend, and other options if booting is something that you do often enough to be an issue with regards to time management.


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