Question copy speed suddenly drops on ssd

[alibohani]

Dear users, recently I've noticed problem in my laptop,
I have 2 ssd drive (one 250gb and one 32gb) also one external usb3 2tb hdd,
when copy large file from/to each ssd to/from external hdd, everything is good, i copy files with stable speed of around 70MB per Sec.,
also when copy large file from hdd to it self, I have stable speed of 35MB per sec.
but when try to copy from one ssd to another one, or copy from each ssd to it slef, first I have speed of about 175MB per Sec., but suddenly speed drops to lower than 20MB Per Sec.
does anyone have idea why this happened? and does this is normal or not?
regards

 

[dwd999]

Dear users, recently I've noticed problem in my laptop,
I have 2 ssd drive (one 250gb and one 32gb) also one external usb3 2tb hdd,
when copy large file from/to each ssd to/from external hdd, everything is good, i copy files with stable speed of around 70MB per Sec.,
also when copy large file from hdd to it self, I have stable speed of 35MB per sec.
but when try to copy from one ssd to another one, or copy from each ssd to it slef, first I have speed of about 175MB per Sec., but suddenly speed drops to lower than 20MB Per Sec.
does anyone have idea why this happened? and does this is normal or not?
regards

Most likely suspect: overheating of the ssd controller. Not much you can do about it.

 

[mdd1963]

Many SATA SSDs have a smallish to medium size amounts of high speed write cache, so that smallish write tasks of just a few GB are seemingly done quickly, while during very large write operations, once the high speed cache is exhausted, the speeds can drop to less than those of a spinning hard drive....as observed.

 

[alibohani]

Most likely suspect: overheating of the ssd controller. Not much you can do about it.

tnx for your reply, how can i check if it's because of over heating or not?

 

[alibohani]

Many SATA SSDs have a smallish to medium size amounts of high speed write cache, so that smallish write tasks of just a few GB are seemingly done quickly, while during very large write operations, once the high speed cache is exhausted, the speeds can drop to less than those of a spinning hard drive....as observed.

tnx, how can I check size of ssd cache?

 

[dwd999]

tnx for your reply, how can i check if it's because of over heating or not?

You could check with the drive's manufacturer to see if they offer their own dedicated utility program to monitor the drive's performance or use one of the general free utility programs like HWINFO.