The Western Digital IX SN530 NVMe SSD declares 650 TBW. The same value is declared for the SN720 drive. The Western Digital PC SN530 NVMe SSD declares 200 TBW. As the disk is reported as an NVMe drive, we can pick some SSD drives from the Western Digital commercial OEM offer that roughly matches the performance of SSD in MacBook. This means nothing but we can speculate that Apple probably used Western Digital chips. The inspection of the M1 MacBook shows that Apple used a chip with the name SDRGJHI4. | Manufacturer | Model | SSD 1 | SSD 2 | NAND | Below is a table showing how much TBW an SSD can take before it starts failing. Both tests are few years old but show that good quality SSD can withstand a lot of abuse. The Samsung 850 Pro achieved a whopping 9100 TBW before it started to relocate sectors. The Samsung 840 Pro achieved over 600 TBW in the endurance test before it started to relocate sectors. We will focus here on the Samsung drives as Apple used their ships in MacBooks before. Some popular SSD has been tested in the past. The larger the SSD the bigger TBW it can take. How much the producers declare their SSD can withstand? As I have a 256 GB model I will use value for this model throughout the article. It depends on the size of the SSD, used technology, and quality of chips used for SSD. TLDR: There is nothing to be worried about! In my case, SSD will last from 5 to 50 years! Endurance of the SSDįirst, we have to take a look at how much TBW and SSD can take before they start to fail.

In this article, I will show how much data is written to my SSD and if is there anything to be worried about (we will look at the Terabytes written or TBW). I use my Mac for code development, machine learning, and data science for 5 days so my disk is rather used extensively. As I was concerned about my M1 MacBook Air (16GB, 256GB SSD), I decided to actively monitor the use of SDD in my Mac. There have been rumors about extensive writes operations to SSD on machines equipped with M1 chip.

Ssd health check mac