Jun 20 2011, 12:34 PM
QUOTE(shadow111 @ Jun 18 2011, 10:45 PM)
one noob question.. do we need to perform defrag for the memory card?
i just got a cheap dna class 10 16GB micro sd.. as time goes, data fragmentation will sure occurs.. do we need to perform defrag like our pc hdd?
is there any tools for this? thanks.
Never defrag flash based storage.i just got a cheap dna class 10 16GB micro sd.. as time goes, data fragmentation will sure occurs.. do we need to perform defrag like our pc hdd?
is there any tools for this? thanks.
1. Mechanical drives' head need to seek back and forth if files are fragmented causing unnecessary wear. Flash access are digital with no such problem and runs several magnitudes faster.
2. De-fragmenting flash causes unnecessary data movement (reads and writes) causing more harm by wearing out flash faster.
3. Flash based storage employs various different algorithms to store data due to flash fundamental behaviour which I'll not explain here, but in a nutshell, OS sees a virtual mapping of the data, not the physical one, thus have no way of knowing how to best manage the data in flash.
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