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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?

#41
post #40

Was it ever really an Apple Silicon issue or a macOS issue? I thought this was a macOS and SSD issue even before Apple Silicon came out?

I'm not sure, but you may be right. In either case, going by the results here, it seems this is expected usage. That is quite something, especially comparing it to linux. No idea how windows plays into this.

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

#42
M2 Mac 500gb about 2-2.5 months old

  === 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:                    0%
  Data Units Read:                    19,753,049 [10.1 TB]
  Data Units Written:                 9,383,782 [4.80 TB]
  Host Read Commands:                 367,211,629
  Host Write Commands:                64,343,144
  Controller Busy Time:               0
  Power Cycles:                       126
  Power On Hours:                     77
  Unsafe Shutdowns:                   5
  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?

#44

M1 Mac Mini. I beat the heck out of this thing. SMART/Health Information (NVMe Log 0x02) Critical Warning: 0x00 Temperature: 28 Celsius Available Spare: 100% Available Spare Threshold: 99% Percentage Used: 5% Data Units Read: 83,875,891 [42.9 TB] Data Units Written: 70,257,403 [35.9 TB] Host Read Commands: 881,926,045 Host Write Commands: 530,490,261 Controller Busy Time: 0 Power Cycles: 3,350 Power On Hours: 496 Uns…

    Unsafe Shutdowns:                   13
That's a bit worrisome. Has your mac been freezing/crashing?

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

#45
post #40

Was it ever really an Apple Silicon issue or a macOS issue? I thought this was a macOS and SSD issue even before Apple Silicon came out?

Something I have noticed is that a few Mac services related to spotlight have a propensity to be very heavy on the system writes.

corespotlightd and suggestd in particular seem to do some kind of indexing operation after some trigger, which can write tens of gigabytes to the SSD.

I managed to narrow it down to an RSS reader app (from the app store, so presumably not doing anything untoward), which appears to be getting indexed. despite having turned almost all indexing in spotlight off, and even excluded ~/Library and /Library from spotlight.

After the main writes are done (150 MB/s for a period of time), corespotlightd and suggestd then continue to generate a background load of around 50 MB/s of writes for a sustained period of time.

Console logs show there's "ProactiveHarvesting" going on in suggestd, but no clear way to switch this off. I suspect (based on watching it write 16 GB over 5 to 10 minutes), others could be encountering this, or other similar behaviour.

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

#46

M1 Mac Mini. I beat the heck out of this thing. SMART/Health Information (NVMe Log 0x02) Critical Warning: 0x00 Temperature: 28 Celsius Available Spare: 100% Available Spare Threshold: 99% Percentage Used: 5% Data Units Read: 83,875,891 [42.9 TB] Data Units Written: 70,257,403 [35.9 TB] Host Read Commands: 881,926,045 Host Write Commands: 530,490,261 Controller Busy Time: 0 Power Cycles: 3,350 Power On Hours: 496 Uns…

Unsafe Shutdowns: 13 That's a bit worrisome. Has your mac been freezing/crashing?

I'm not sure but I wonder if it happens when you do the macos install / recovery mode where it does repeated reboots.

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

#48
M1 Air 16GB 1 TB, probably like 𝟹̶ ̶𝚖̶𝚘̶𝚗̶𝚝̶𝚑̶𝚜̶ ̶𝚘̶𝚕̶𝚍̶ 5 months old

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

    SMART/Health Information (NVMe Log 0x02)
    Critical Warning:                   0x00
    Temperature:                        38 Celsius
    Available Spare:                    100%
    Available Spare Threshold:          99%
    Percentage Used:                    15%
    Data Units Read:                    864,095,867 [442 TB]
    Data Units Written:                 856,395,960 [438 TB]
    Host Read Commands:                 2,546,210,282
    Host Write Commands:                2,241,066,233
    Controller Busy Time:               0
    Power Cycles:                       97
    Power On Hours:                     1,389
    Unsafe Shutdowns:                   7
    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?

#49

M1 Mac Mini. I beat the heck out of this thing. SMART/Health Information (NVMe Log 0x02) Critical Warning: 0x00 Temperature: 28 Celsius Available Spare: 100% Available Spare Threshold: 99% Percentage Used: 5% Data Units Read: 83,875,891 [42.9 TB] Data Units Written: 70,257,403 [35.9 TB] Host Read Commands: 881,926,045 Host Write Commands: 530,490,261 Controller Busy Time: 0 Power Cycles: 3,350 Power On Hours: 496 Uns…

Unsafe Shutdowns: 13 That's a bit worrisome. Has your mac been freezing/crashing?

I hold the record for "unsafe shutdowns."

One reason, is that I am constantly using Xcode, which is a bug farm, and SourceSafe used to crash like crazy.

Also, some of the apps I'm developing don't start off, perfect. I spend a lot of time crashing.

The advent of the M1 seems to have ushered in a new threading system. The threads act weird, now (look at how long it takes to resolve your stack, on a breakpoint). I'm pretty sure it really doesn't like crashes.

And I stopped playing Borderlands 3, because it liked to crash hard.

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

#50
M1 Macbook Air 2020 8GB 256GB bought August 2021

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

  SMART/Health Information (NVMe Log 0x02)
  Critical Warning:                   0x00
  Temperature:                        27 Celsius
  Available Spare:                    100%
  Available Spare Threshold:          99%
  Percentage Used:                    0%
  Data Units Read:                    9,136,753 [4.67 TB]
  Data Units Written:                 4,296,299 [2.19 TB]
  Host Read Commands:                 123,750,226
  Host Write Commands:                65,201,990
  Controller Busy Time:               0
  Power Cycles:                       212
  Power On Hours:                     94
  Unsafe Shutdowns:                   27
  Media and Data Integrity Errors:    0
  Error Information Log Entries:      0
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