[SOLVED] File Transfer Speed drops down and gets slow?

[TechQuestion1]

The file transfer speed is fast untill suddenly... it drops down for whatever reason?
SSD or Windows Problem?

 

[richiestang_78]

Is this a single file?

What SSD do you have?

 

[popatim]

You've exceeded the drives speedy buffer and have dropped down to it's native speed would be my assumption.

 

[Math Geek]

You've exceeded the drives speedy buffer and have dropped down to it's native speed would be my assumption.

my thought as well. this is normal. it's blazing fast for a minute, then once buffer is emptied, it slows dramatically. large files usually do this.

 

[TechQuestion1]

my thought as well. this is normal. it's blazing fast for a minute, then once buffer is emptied, it slows dramatically. large files usually do this.

To understand this i must know what buffer means? because i dont.


so this happens with large files, but why?

 

[popatim]

The buffer is a space of fast 'memory'. it absorbs the file at high speed until its full. The controller chip on the drive takes the data from the buffer and writes it to the actual storage part of the drive. Some drives have a dram buffer in addition to using part of the SSD's flash in Single level (SLC) mode (which is faster the Triple (TLC) or quad (QLC/QVO) cell mode but not as fast as a dram buffer. You'll see the SLC buffer called eSLC sometimes becuase the drive is using part of its flash cells, which these days are TLC or QLC, in SLC emulation because it's much faster then writing direct to the TLC/QLC cells.

After the buffer is full is when you'll see the slowdown. Some drives even pause while the controller clears the buffer and then starts back up again, leaving your graph with pulsing type waveform.

*img courtesy of TechpowerUp.