大家 M1 SSD 写入量在更新到 MacOS 11.4 之后是否有所改善呢？

我自己的统计显示是没有：

# R: read; W:write; WA: write volume per hour on average; D: degree; U: used percent
# System information: MacOS 11.4 Big Sur
# Macbook M1 air 8g RAM 256 SSD
[2021-05-29 22:30:02,110 INFO] R: 17.017 TB; W: 13.546 TB; WA: 92.78 GB/H; D: 36 °C; U: 0.00 %
[2021-05-29 23:30:01,698 INFO] R: 17.036 TB; W: 13.560 TB; WA: 92.88 GB/H; D: 32 °C; U: 0.00 %
[2021-05-30 00:30:00,774 INFO] R: 17.043 TB; W: 13.564 TB; WA: 92.90 GB/H; D: 34 °C; U: 1.00 %
[2021-05-30 01:30:00,936 INFO] R: 17.052 TB; W: 13.572 TB; WA: 92.96 GB/H; D: 32 °C; U: 1.00 %
[2021-05-30 02:30:00,544 INFO] R: 17.057 TB; W: 13.577 TB; WA: 92.99 GB/H; D: 27 °C; U: 1.00 %
[2021-05-30 04:30:03,208 INFO] R: 17.083 TB; W: 13.603 TB; WA: 92.54 GB/H; D: 27 °C; U: 1.00 %
[2021-05-30 05:30:03,367 INFO] R: 17.092 TB; W: 13.612 TB; WA: 92.60 GB/H; D: 27 °C; U: 1.00 %
[2021-05-30 06:30:00,629 INFO] R: 17.102 TB; W: 13.619 TB; WA: 92.65 GB/H; D: 28 °C; U: 1.00 %
[2021-05-30 07:37:01,242 INFO] R: 17.113 TB; W: 13.630 TB; WA: 92.72 GB/H; D: 26 °C; U: 1.00 %
[2021-05-30 08:30:01,358 INFO] R: 17.126 TB; W: 13.643 TB; WA: 92.81 GB/H; D: 27 °C; U: 1.00 %
[2021-05-30 09:30:01,367 INFO] R: 17.135 TB; W: 13.651 TB; WA: 92.86 GB/H; D: 27 °C; U: 1.00 %
[2021-05-30 10:30:01,533 INFO] R: 17.143 TB; W: 13.658 TB; WA: 92.91 GB/H; D: 27 °C; U: 1.00 %
[2021-05-30 14:30:01,307 INFO] R: 17.170 TB; W: 13.677 TB; WA: 92.41 GB/H; D: 41 °C; U: 1.00 %
[2021-05-30 15:30:01,478 INFO] R: 17.181 TB; W: 13.681 TB; WA: 92.44 GB/H; D: 40 °C; U: 1.00 %
[2021-05-30 16:30:01,561 INFO] R: 17.192 TB; W: 13.684 TB; WA: 92.46 GB/H; D: 43 °C; U: 1.00 %
[2021-05-30 17:30:01,511 INFO] R: 17.202 TB; W: 13.687 TB; WA: 92.48 GB/H; D: 41 °C; U: 1.00 %
[2021-05-30 19:30:01,382 INFO] R: 17.255 TB; W: 13.718 TB; WA: 92.07 GB/H; D: 40 °C; U: 1.00 %
[2021-05-30 20:30:01,250 INFO] R: 17.263 TB; W: 13.721 TB; WA: 92.09 GB/H; D: 41 °C; U: 1.00 %
[2021-05-30 23:30:01,393 INFO] R: 17.314 TB; W: 13.756 TB; WA: 92.32 GB/H; D: 34 °C; U: 1.00 %
[2021-05-31 00:30:02,367 INFO] R: 17.328 TB; W: 13.763 TB; WA: 91.75 GB/H; D: 38 °C; U: 1.00 %
[2021-05-31 09:34:13,724 INFO] R: 17.616 TB; W: 14.034 TB; WA: 92.94 GB/H; D: 28 °C; U: 1.00 %
[2021-05-31 10:30:01,861 INFO] R: 17.635 TB; W: 14.044 TB; WA: 93.01 GB/H; D: 36 °C; U: 1.00 %
[2021-05-31 11:30:01,741 INFO] R: 17.650 TB; W: 14.050 TB; WA: 92.43 GB/H; D: 37 °C; U: 1.00 %

这是我在这两天的 SSD 写入量统计，每一小时记录一次，可以发现每天都有大概 100G 以上的写入，一个月大概写入了 14TB，不过损耗只有 1%。按照损耗算的话笔记本可以用 10 年，应该还好。

值得注意的是，因为 SSD 并不是每时每刻都在通电，因此以 SMARTCTL 中得到的结果作为通电时间。