[SOLVED] Total amount of data written rises more quickly than expected during partitioning ?

[Pimpom]

Let me state at the outset that this post arises out of academic curiosity and has nothing to do with concern about reaching the TBW rating prematurely.

I'm toying with a new Crucial MX500 1TB SSD by creating partitions with a combination of Diskpart and Minitool Partition Wizard , including system and OEM partitions. Before starting anything else, I ran CDI and it reported zero for TBW, power on hours and power cycle. Then I did a surface scan with HDTune up to 2% which should involve the first ~19GB. Still zero GB written in CDI.

Then I started experimenting with the partitioning. After I'd finished creating 10 partitions (GPT system and OEM), I was surprised to see that the amount of data written had reached 17GB. Today I cleaned the disk and created essentially the same partitions again. Not a single byte of user data has been written but the amount of data written has risen to 27GB.

The only times an operation finished other than near-instantaneously were when I manually set the type IDs of some partitions. These took a few seconds each. Can this be when those GBs were written?
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[kerberos_20]

deleting and adding partitions will pretty much wipe (rewrite) and write new stuffs
even if drive was empty and you were just testing partitions...empty partition isnt exactly empty, there are some data written which normal usser doesnt have access to
anyway what you experiencing is this: https://en.wikipedia.org/wiki/Write_amplification

 

[Pimpom]

Ah, that must be it. Thanks.
I'd heard of write amplification before but never really gave it serious thought. Thanks for pointing it out.