Днешната сесия за въпроси и отговори ни идва с любезното съдействие на SuperUser - подразделение на Stack Exchange - обединяване на уеб сайтове с въпроси и отговори.
Снимката е предоставена от Hong Chang Bum (Flickr).
Въпроса
PGmath на SuperUser иска да знае защо по-малките SSD устройства са по-бавни:
I was reading this article on testing SSDs from Tom’s Hardware and came across the following claim:
With SSDs, performance varies by capacity point. Smaller drives tend to be slower than larger ones, even in the same family.
However, the article does not back up the claim or explain why. It does not seem intuitive to me that smaller SSD drives would be slower. I would expect it to be the other way around since a larger drive has a wider “area” to access via the same bandwidth. In researching SSDs, I have found that many sites do not even include SSD drives smaller than 240 GB in their comparisons.
So, is it true that smaller (capacity) SSDs are slower? If so, why is that the case?
Защо по-малките SSD устройства са по-бавни?
Отговорът
Участниците в SuperUser magicandre1981 и Hakan Lindqvist имат отговора за нас. Първо, magicandre1981:
Larger SSDs are faster because they use more Channels in parallel while smaller ones only use a few channels (4 instead of 8):
Последвано от отговора на Хакан Линдквист:
The higher capacity variants of an SSD model often get their higher capacity from simply having more NAND flash chips of the same type as the lower capacity variants. Having more NAND flash chips allows for a design where the controller on the SSD can access more data in parallel, allowing for higher speeds.
Имате ли нещо, което да добавите към обяснението? Звучи в коментарите. Искате ли да прочетете повече отговори от други потребители на Stack Exchange? Вижте цялата тема на дискусията тук.