what do you mean by write and speed in SSD?

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qwerty1234567

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Mar 2, 2015
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what do you mean by write and speed in SSD, is that the copying of files(read) and pasting or moving files (write) in to your SSD? coz' I'm confused..
 
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JohnnyLucky

JohnnyLucky

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May 30, 2007
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You have the right idea.

There are several ways ssd performance can be measured. One way is to measure how quickly data on an ssd is read and how quickly data is written to an ssd. These read and write "speeds" are usually expressed in megabytes per second. For modern SATA 3 ssd's the maximum read "speed" is limited to just under 550 MB/sec and the maximum write "speed" is usually a little lower. The 550 MB/sec limitation is caused by the limitation of the SATA 3 data transmission rate between the ssd and the cpu. This limitation is often referred to as a bottleneck. Newer PCI-e and M.2 ssd's that use a PCI-e connection instead of a SATA 3 connection are capable of much higher read and write speeds. For example the brand new Samsung SM951 M.2 which is a type of PCI-e 3.0 x 4 ssd that will be released for retail sales next May is capable of read speeds in excess of 2,100 MB/sec providing a motherboard with an appropriate M.2 slot and configuration can support the drive.
 
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JohnnyLucky

JohnnyLucky

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The files can be a lot of small ones or one great big file. Typically users work with a lot of small files. The limited reads and rights refer to something different than speed. The term limited reads and writes refer to the maximum number of times data can be written to and deleted from a data block in an ssd. It is usually referred to as a P/E cycle. The P/E cycles are limited. It can only be done a limited number of times. How many P/E cycles? It varies but it is a lot. Most ssd's should last quite a few years. The Tech Report is a web site that publishes technical reviews. Last year they tested six ssd's by constantly writing data to an ssd and deleting it. Several of the ssd's had as much as 2 petabytes of data written to and deleted from them and they were still going strong.
 
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qwerty1234567

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Mar 2, 2015
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okay, Thanks much Johnny... I'm just a little worried of what I read in some threads and reviews that if you reached the maximum writes and reads of an SSD, it will crash or will affect the performance.. what can you say about that?
 
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JohnnyLucky

JohnnyLucky

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I edited my previous comment while you were typing your comment. I changed it because I finally figured out your comment about limited reads and writes was not about speed. It was probably about the number of times data can be written to and deleted from a data block. Please take another look at the edited post.
 
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