Ask HN: Has the Apple Silicon excessive disk read/write issue been fixed?
Wow...looks like I don&#x27;t do much disk I&#x2F;O compared to most people here. I&#x27;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.<p><pre><code>  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]
  Host Read Commands:                 4,760,816,278
  Host Write Commands:                3,237,489,546
  Controller Busy Time:               7,045
  Power Cycles:                       16,947
  Power On Hours:                     2,307
  Unsafe Shutdowns:                   109
  Media and Data Integrity Errors:    0
  Error Information Log Entries:      0
</code></pre>
I&#x27;ve got 64 GB of RAM so don&#x27;t have much swap usage which probably helps.<p>I see everyone posting data for M1 Macs has an &quot;Available Spare Threshold&quot; of 99% whereas I&#x27;ve got 10%. What&#x27;s the story there?<p>My understanding is that you want &quot;Available Spare&quot; to be as high as possible, and &quot;Available Spare Threshold&quot; is how low &quot;Available Spare&quot; can go before it is considering to be a failure, so the lower &quot;Available Spare Threshold&quot; the better.