M1 Mac owners are experiencing high SSD writes over short periods of time

Re:M1 Mac owners are experiencing high SSD writes over short... by boardwaalk on Tuesday February 23, 2021 @08:12PM (#26245378)

You're where I am and I've had this Intel MBP for nearly 4 years and haven't been nice to it (compiling, etc).

    Percentage Used:                    3%
    Data Units Read:                    57,377,073 [29.3 TB]
    Data Units Written:                 77,652,525 [39.7 TB]
    Host Read Commands:                 1,297,472,434
    Host Write Commands:                1,855,797,459

I have 10x your host r/w commands. I wonder if the size of the SSD's blocks on these new MBP are very large so you get large physical writes for small OS writes? Or maybe the controller is bad at coalescing writes?

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Re:M1 Mac owners are experiencing high SSD writes over short... by tyingq on Tuesday February 23, 2021 @09:17PM (#26245829)

~10x off could also just be bad math in the smartdata path somewhere, either on the drive, or in the OS.

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Re:M1 Mac owners are experiencing high SSD writes over short... by pcnix on Wednesday February 24, 2021 @07:31AM (#26249189)

Intel MBP at two years

```

=== START OF SMART DATA SECTION === SMART overall-health self-assessment test result: PASSED

SMART/Health Information (NVMe Log 0x02) Critical Warning: 0x00 Temperature: 42 Celsius Available Spare: 100% Available Spare Threshold: 99% Percentage Used: 23% Data Units Read: 439,149,863 [224 TB] Data Units Written: 407,143,345 [208 TB] Host Read Commands: 2,930,228,690 Host Write Commands: 1,777,317,283 Controller Busy Time: 0 Power Cycles: 103 Power On Hours: 1,691 Unsafe Shutdowns: 49 Media and Data Integrity Errors: 0 Error Information Log Entries: 0 ```

Ouch.

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