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M1 SSD high read and write usage per smartctl

Hello,


In the past few weeks it's been reported that M1 SSDs are writing a sufficient amount of data to their drives such that it could render the drive at its end of life in a few years.

https://twitter.com/marcan42/status/1361151198921826308?lang=en

https://www.macworld.com/article/3609512/how-to-m1-intel-mac-ssd-health-terminal-smartmontools.html


The the smartctl tool reports that my M1 MacBook Air has written 12.3 TB since being purchased in mid-December. Assuming this SSD has a lifetime ability to write 150TB, this disk is expected to have issues in approximately 2.8 years.


My questions are 1) is smartctl correctly reporting SSD data write usage. 2) What is this SSDs actual lifetime writing ability? 3) When is my SSD actually expected to fail 4) What is Apple's position on this and what action are they taking to address it?


############################# smartctl log ############################

smartctl 7.2 2020-12-30 r5155 [Darwin 20.3.0 arm64] (local build)


Copyright (C) 2002-20, Bruce Allen, Christian Franke, www.smartmontools.org




=== START OF INFORMATION SECTION ===


Model Number:                       APPLE SSD AP0256Q


Serial Number:                      000000000000000


Firmware Version:                   1161.80.


PCI Vendor/Subsystem ID:            0x106b


IEEE OUI Identifier:                0x000000


Controller ID:                      0


NVMe Version:                       <1.2


Number of Namespaces:               3


Local Time is:                      Sun Mar  7 13:05:18 2021 EST


Firmware Updates (0x02):            1 Slot


Optional Admin Commands (0x0004):   Frmw_DL


Optional NVM Commands (0x0004):     DS_Mngmt


Maximum Data Transfer Size:         256 Pages




Supported Power States


St Op     Max   Active     Idle   RL RT WL WT  Ent_Lat  Ex_Lat


 0 +     0.00W       -        -    0  0  0  0        0       0




=== START OF SMART DATA SECTION ===


SMART overall-health self-assessment test result: PASSED




SMART/Health Information (NVMe Log 0x02)


Critical Warning:                   0x00


Temperature:                        32 Celsius


Available Spare:                    100%


Available Spare Threshold:          99%


Percentage Used:                    1%


Data Units Read:                    29,157,637 [14.9 TB]


Data Units Written:                 24,058,076 [12.3 TB]


Host Read Commands:                 201,555,222


Host Write Commands:                126,383,064


Controller Busy Time:               0


Power Cycles:                       176


Power On Hours:                     132


Unsafe Shutdowns:                   5


Media and Data Integrity Errors:    0


Error Information Log Entries:      0


MacBook Air 13″, macOS 11.2

Posted on Mar 7, 2021 10:21 AM

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43 replies

Jun 12, 2021 2:13 AM in response to mu2004

Since I've upgraded to 11.4 it feels like the issue disappeared. The swap stays low and on the other hand memory pressure is a lot higher than it used to be before. But now it's correct imo. And even overall performance seems to be better to me. After 8 days of working average 8 hours a day kernel task has written only 150 GB, which is pretty nice. I have 16 GB but running some java apps, php, docker and IntelliJ (not mentioning thousands tabs in safari, and other apps like discord chrome etc) so I use constantly all of my available memory and still got only 150 GB. So at least I would say that it's finally fixed.

M1 SSD high read and write usage per smartctl

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