Comments on: The modern marvel of the SSD http://blog.superuser.com/2011/02/10/the-modern-marvel-of-the-ssd/ The Super User Community Blog Mon, 05 Dec 2016 07:34:06 +0000 hourly 1 https://wordpress.org/?v=4.5.6 By: JH http://blog.superuser.com/2011/02/10/the-modern-marvel-of-the-ssd/#comment-9 Mon, 14 Mar 2011 04:16:16 +0000 http://superuser.blogoverflow.com/?p=334#comment-9 Thank you for the post and your hard work you put in. I think you made a slight typo above – under major limitations – you said you can only delete 4kb blocks – That should be 512kb blocks – Quote – “A single NAND flash die is subdivided into blocks. The typical case these days is that each block is 512KB in size. Each block is further subdivided into pages, with the typical page size these days being 4KB.

Now you can read and write to individual pages, so long as they are empty. However once a page has been written, it can’t be overwritten, it must be erased first before you can write to it again. And therein lies the problem, the smallest structure you can erase in a NAND flash device today is a block. Once more, you can read/write 4KB at a time, but you can only erase 512KB at a time.”

source – http://www.anandtech.com/show/2738/6

]]> By: stackoverflow http://blog.superuser.com/2011/02/10/the-modern-marvel-of-the-ssd/#comment-8 Mon, 07 Mar 2011 23:35:16 +0000 http://superuser.blogoverflow.com/?p=334#comment-8 Awesome post! Thanks for the in depth info

]]> By: Arjan http://blog.superuser.com/2011/02/10/the-modern-marvel-of-the-ssd/#comment-7 Thu, 24 Feb 2011 09:44:24 +0000 http://superuser.blogoverflow.com/?p=334#comment-7 I’ve not read all of the above, nor the linked articles. But just in case it is not mentioned: securely erasing files from SSDs is difficult. One might want to consider always using encryption on SSDs (though that has less critical flaws too*).

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