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Ask HN: Has the Apple Silicon excessive disk read/write issue been fixed?

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Re: Ask HN: Has the Apple Silicon excessive disk read/write issue been fixed?

#21

Post by cool_hw »

erwinh wrote: post #18

SMART/Health Information (NVMe Log 0x02) Critical Warning: 0x00 Temperature: 34 Celsius Available Spare: 100% Available Spare Threshold: 99% Percentage Used: 8% Data Units Read: 1,464,393,120 [749 TB] Data Units Written: 442,313,981 [226 TB] Host Read Commands: 21,452,008,572 Host Write Commands: 3,394,045,680 Controller Busy Time: 0 Power Cycles: 288 Power On Hours: 2,173 Unsafe Shutdowns: 18 Media and Data Integrit…

Wow. What is the SSD capacity?

So 226TB is ~8% for this capacity, i.e., about 28.25TB per 1%, so about 2825TB expected TBW. Ignoring the fact that this is ignoring many factors contributing to the life span, it's still quite an interesting capacity.

Re: Ask HN: Has the Apple Silicon excessive disk read/write issue been fixed?

#22

Post by ukd1 » 

  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:                    19,533,293 [10.0 TB]
  Data Units Written:                 37,837,167 [19.3 TB]
  Host Read Commands:                 643,692,760
  Host Write Commands:                1,112,961,675
  Controller Busy Time:               0
  Power Cycles:                       215
  Power On Hours:                     505
  Unsafe Shutdowns:                   23
  Media and Data Integrity Errors:    0
  Error Information Log Entries:      0

 seems fixed?

Re: Ask HN: Has the Apple Silicon excessive disk read/write issue been fixed?

#24

Post by phyalow » 

  smartctl 7.3 2022-02-28 r5338 [Darwin 21.4.0 arm64] (local build)
  Copyright (C) 2002-22, Bruce Allen, Christian Franke, 
  www.smartmontools.org

  === START OF INFORMATION SECTION ===
  Model Number:                       APPLE SSD AP2048R
  Serial Number:                      0ba0160b818c6a36
  Firmware Version:                   387.100.
  PCI Vendor/Subsystem ID:            0x106b
  IEEE OUI Identifier:                0x000000
  Controller ID:                      0
  NVMe Version:
Macbook Pro M1 Max - 2021 16" 64GB Ram 2TB SSD

Re: Ask HN: Has the Apple Silicon excessive disk read/write issue been fixed?

#26

Post by xkcd-sucks »

M1 Macbook Pro, about 4 months old, used for work which involves lots of file data volume, only 8G RAM so there's a lot of swapping going on. The lifetime percentage value is a bit worrying. Also the "unsafe shutdown count" is entirely due to hard crashes / blank screen of death that happen randomly every few weeks

    === START OF SMART DATA SECTION ===
    SMART overall-health self-assessment test result: PASSED
    
    SMART/Health Information (NVMe Log 0x02)
    Critical Warning:                   0x00
    Temperature:                        33 Celsius
    Available Spare:                    100%
    Available Spare Threshold:          99%
    Percentage Used:                    6%
    Data Units Read:                    379,131,189 [194 TB]
    Data Units Written:                 378,539,362 [193 TB]
    Host Read Commands:                 1,090,496,552
    Host Write Commands:                883,626,255
    Controller Busy Time:               0
    Power Cycles:                       129
    Power On Hours:                     673
    Unsafe Shutdowns:                   8
    Media and Data Integrity Errors:    0
    Error Information Log Entries:      0

Re: Ask HN: Has the Apple Silicon excessive disk read/write issue been fixed?

#27

Post by gjsman-1000 »

MacBook Air, M1, 512GB, purchased December 2020, 16GB RAM, as you can tell quite hammered for a web developer who doesn't use the main JavaScript frameworks or Docker almost ever.

    SMART/Health Information (NVMe Log 0x02)
    Critical Warning:                   0x00
    Temperature:                        30 Celsius
    Available Spare:                    100%
    Available Spare Threshold:          99%
    Percentage Used:                    2%
    Data Units Read:                    139,890,354 [71.6 TB]
    Data Units Written:                 100,146,689 [51.2 TB]
    Host Read Commands:                 1,957,345,039
    Host Write Commands:                1,121,330,045
    Controller Busy Time:               0
    Power Cycles:                       724
    Unsafe Shutdowns:                   85
    Media and Data Integrity Errors:    0
    Error Information Log Entries:      0

Re: Ask HN: Has the Apple Silicon excessive disk read/write issue been fixed?

#28

Post by cool_hw »

ukd1 wrote: post #22

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: 19,533,293 [10.0 TB] Data Units Written: 37,837,167 [19.3 TB] Host Read Commands: 643,692,760 Host Write Commands: 1,112,961,675 Controller Busy Time: 0 Power Cycles: 215 Power On Hours: 505 Unsafe Shutdowns: 23 Media and Data Integrity Error…

> seems fixed?

My linux machine that I have used for professional development for 6 years now reports (typed out the relevant bits by hand).

    Data Units Read:                    ...[4.44 TB]
    Data Units Written:                 ...[5.40 TB]
    ....
    Power Cycles:                       811
    Power On Hours:                     1142
16GB 512GB SSD

This is a machine that has been used for full time development, running virtual machines and docker and all sorts of activity.

After all that, it reports only ~5TB read/written. That is mind blowing to me.

Re: Ask HN: Has the Apple Silicon excessive disk read/write issue been fixed?

#29

Post by cool_hw »

gjsman-1000 wrote: post #27

MacBook Air, M1, 512GB, purchased December 2020, 16GB RAM, as you can tell quite hammered for a web developer who doesn't use the main JavaScript frameworks or Docker almost ever. SMART/Health Information (NVMe Log 0x02) Critical Warning: 0x00 Temperature: 30 Celsius Available Spare: 100% Available Spare Threshold: 99% Percentage Used: 2% Data Units Read: 139,890,354 [71.6 TB] Data Units Written: 100,146,689 [51.2 TB…

Thanks for sharing, that's a lot of reads/writes.

Re: Ask HN: Has the Apple Silicon excessive disk read/write issue been fixed?

#30

Post by cool_hw »

matai_kolila wrote: post #10

My MacBook Air (M1, 2020): === 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: 8,843,213 [4.52 TB] Data Units Written: 12,256,532 [6.27 TB] Host Read Commands: 229,897,011 Host Write Commands: 452,963,…

As I shared in another post, compared to my linux machine, most of the posts, including yours, have atleast 5x-10x the usage. I understand that disk usage can vary wildly, but the linux machine I'm comparing with has been used through the work week for the past 6 years with VMs/docker and other large files.
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