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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?

#111

Post by cool_hw »

krackers wrote: post #102
cool_hw wrote: post #7

Earlier quoted context omitted.

Your read/writes seem to be comparable to the parent, but your power on hours are significantly lower, really hard to draw any conclusions here. I wonder if this whole issue is simply MacOS dumping the stuff in memory to disk when going to standby, and then reading it all back. So for a 16GB machine, for simplicity, let's say you always have RAM saturated, and you open/close the lid 5 times in a day, you have 16GB *…

>open/close the lid 5 times in a day It's a bit smarter than that, it only writes memory contents to disk after a given period in standby. So in your example you'd only be incurring it twice a day probably.

Indeed, I intended to say letting it get to standby. :)

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

#112

Post by cool_hw »

tzs wrote: post #93

Wow...looks like I don't do much disk I/O compared to most people here. I'm on a 2017 iMac that I use for both personal stuff and work. It seems like most people here can do in a few months what it took me 5 years to do. Critical Warning: 0x00 Temperature: 39 Celsius Available Spare: 100% Available Spare Threshold: 10% Percentage Used: 2% Data Units Read: 163,453,178 [83.6 TB] Data Units Written: 96,776,875 [49.5 TB]…

I noticed that on my linux machine the available spare threshold number is 10% too.

Thank you for posting, this (and the sibling posts and some google searching) confirms to me that older macs were not using disks this much for the same tasks.

I still may be wrong about this, but I am yet to see a counterpoint from Apple Silicon machines.

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

#113

Post by cool_hw »

pelagicAustral wrote: post #107
tzs wrote: post #93

Wow...looks like I don't do much disk I/O compared to most people here. I'm on a 2017 iMac that I use for both personal stuff and work. It seems like most people here can do in a few months what it took me 5 years to do. Critical Warning: 0x00 Temperature: 39 Celsius Available Spare: 100% Available Spare Threshold: 10% Percentage Used: 2% Data Units Read: 163,453,178 [83.6 TB] Data Units Written: 96,776,875 [49.5 TB]…

I'm an 2017 iMac as well, use it every day for work and personal stuff... sometimes literally hammer the stuff and my numbers look nothing like some the other ones displayed here... bit of a shocker. === START OF SMART DATA SECTION === SMART overall-health self-assessment test result: PASSED SMART/Health Information (NVMe Log 0x02) Critical Warning: 0x00 Temperature: 36 Celsius Available Spare: 100% Available Spare T…

Thank you for the data point, and your usage on an M1 will probably yield crazier numbers. This is why I asked, Apple silicon machines look like they're using the disk far more than older macs.

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

#114

Post by cool_hw »

petercooper wrote: post #109
tzs wrote: post #93

Wow...looks like I don't do much disk I/O compared to most people here. I'm on a 2017 iMac that I use for both personal stuff and work. It seems like most people here can do in a few months what it took me 5 years to do. Critical Warning: 0x00 Temperature: 39 Celsius Available Spare: 100% Available Spare Threshold: 10% Percentage Used: 2% Data Units Read: 163,453,178 [83.6 TB] Data Units Written: 96,776,875 [49.5 TB]…

I had a 16GB M1 MBP for about 9 months and I was very happy with it, but once I started using Docker, I decided I needed more RAM. Bought a 64GB one and.. wow.. it's the same CPU but the machine feels so much snappier (and it's not a clean install). macOS really seems to like having all that RAM about even if it claims to not be leaning on it heavily.

Perhaps one day when Apple prices the RAM upgrades reasonably..

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

#115

Post by cool_hw »

frankjr wrote: post #108
tzs wrote: post #93

Wow...looks like I don't do much disk I/O compared to most people here. I'm on a 2017 iMac that I use for both personal stuff and work. It seems like most people here can do in a few months what it took me 5 years to do. Critical Warning: 0x00 Temperature: 39 Celsius Available Spare: 100% Available Spare Threshold: 10% Percentage Used: 2% Data Units Read: 163,453,178 [83.6 TB] Data Units Written: 96,776,875 [49.5 TB]…

I'm surprised by the numbers here as well. I have a late 2016 MBP 512GB (used daily) and the numbers are nowhere similar. It's a bit worrying though that I'm the only one in this thread with error log entries. SMART/Health Information (NVMe Log 0x02) Critical Warning: 0x00 Temperature: 30 Celsius Available Spare: 100% Available Spare Threshold: 10% Percentage Used: 3% Data Units Read: 59,731,850 [30.5 TB] Data Units…

Is there a way to look up that error log?

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

#116

Post by cool_hw »

jackjeff wrote: post #76

Mac Studio M1 Max / 32 GB RAM / 2TB SSD / April 2022 Used daily for moderate "office" usage (Slack/Teams/Firefox/RDP) during office hours. Heavier usage (XCode/AndroidStudio/Lightroom/FCP) on weekends/evenings. === 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% Availa…

> Addendum. I just wrote 1.7GB in the last 30mins while reading HN on Firefox, and a few other web pages.

Thanks for sharing this. I need to see if linux does this.

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

#117

Post by cool_hw »

kareemm wrote: post #90

2020 M1 Air 16BG/1TB. Still running OS X 11.3 - looks like I should upgrade... === 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: 28% Data Units Read: 1,704,591,506 [872 TB] Data Units Written: 1,502,526,446 [769 TB] Hos…

Wow, that's a well used machine!

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

#118

Post by cool_hw »

cozzyd wrote: post #71
whalesalad wrote: post #39

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…

How are your power on hours 496 then? Something is fishy...

I think that's because `power on` hours is talking about the disk being in the power on state, not the rest of the machine.

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

#119

Post by TkTech »

8fingerlouie wrote: post #106

I have no idea how people are punishing their MacBooks that hard. My M1 MacBook Pro (mid 2020, 16GB RAM / 512GB SSD) has been used as a daily driver for my personal stuff (not work), so while usage may be light compared to a work machine, it has seen it's fair share of C/C++/C#/Swift/Go/Python code come through (studying for a master degree), as well as papers being written. My battery is in a much worse state than m…

That's how long the drive has been powered up, not the CPU. It sleeps pretty aggressively, and why not, no disk to spin up.

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

#120

Post by cool_hw »

AdamJacobMuller wrote: post #84
cool_hw wrote: post #7

Earlier quoted context omitted.

Your read/writes seem to be comparable to the parent, but your power on hours are significantly lower, really hard to draw any conclusions here. I wonder if this whole issue is simply MacOS dumping the stuff in memory to disk when going to standby, and then reading it all back. So for a 16GB machine, for simplicity, let's say you always have RAM saturated, and you open/close the lid 5 times in a day, you have 16GB *…

Launch day purchased M1 MacBook Pro with 4TB SSD. I have custom pmset setup to NOT dump to disk (mostly) with two aliases: pmset-fast: sudo pmset -ab hibernatemode 0 sleep 0 pmset-secure: sudo pmset -ab hibernatemode 25 sleep 0 displaysleep 1 First one is memory only, if the battery dies, the battery dies and the OS goes away. The second one is hard drive only, closing the lid writes to disk only and puts the laptop…

Is there a noticeable difference in battery life usage with option 1?
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