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Uhh, that may be what apple is reporting but most SSDs only last for about 100-200TB of write, so I would take that percentage used with a grain of salt. They a
by genmud 6y ago
Uhh, that may be what apple is reporting but most SSDs only last for about 100-200TB of write, so I would take that percentage used with a grain of salt. They are probably counting wear leveling percentage used.
On the low end assuming 200TBW that means you have used about 3.3% of the life of your SSD and on the high side you have used 6.75%. Lets say you got your M1 on release in November, that would mean you are using about 1.68%/month on the high end and .84%/month on the low end.
Assume it lasts 200TBW, which I don't think they will, you would be on track for a 8 year lifespan of the SSD. Otherwise 4 years on the low end, assuming the write amount stays the same (which won't likely happen), which would imply you are using the same or less swap.
Every year, I find that I use about 1-2gb more on average, so for me/my usage patterns I almost find the 16gb of memory in the MBPs to be a slap in the face. I have a 13'' and a 16'' MBP with 32/64gb respectively and I don't think I would find anything less acceptable. Right now, my typical memory usage is around 30-40gb when I run docker, vscode, chrome, slack, zoom, etc. I am not even running any VMs(other than the docker vm), I typically will spin those up elsewhere.
For reference, this is my 16'' daily MBP after nearly a year (4.84TB write) and I typically pull down lots of logs/data.
Available Spare: 100%
Available Spare Threshold: 99%
Percentage Used: 0%
Data Units Read: 4,406,559 [2.25 TB]
Data Units Written: 9,454,881 [4.84 TB]
Host Read Commands: 183,307,692
Host Write Commands: 406,821,556
- llukas 6y agoHigh end SSD can have over 1000 TBW. Any idea which are in Apple HW?
- deleted 6y ago[deleted]
- Reason077 6y ago> "most SSDs only last for about 100-200TB of write" My 3.5-year old MacBook Pro has 119 TB of writes, and still claims 79% "available spare": Available Spare: 79% Available Spare Threshold: 2% Percentage Used: 15% Data Units Read: 256,111,725 [131 TB] Data Units Written: 232,470,299 [119 TB] Host Read Commands: 2,872,362,421 Host Write Commands: 1,547,764,735 That said, my 1-month old M1 MacBook Air is already up to 7 TB writes, so seems to be writing at a significantly higher rate. Both are 8GB machines.
- zlynx 6y agoFrom what I have seen the available spare value will decrease rapidly near end of life. As Flash cells start to fail they are replaced by spare. Because of write leveling this is delayed for a while, but then as each cell reaches its 300 or 3,000 writes, they all start to fail.