I’m still waiting until I see little X Æ A-Xii playing in the street while Tesla Robotaxis deliver passengers before I buy these arguments. Until then, my children are playing in the street while these autonomous vehicles threaten their safety. I’m upset that this is forced upon the public by the government.
Readit Newsjmpman commented on Tesla reports another Robotaxi crash electrek.co/2025/12/15/te... · Posted by u/hjouneau
The card was purchased from a major brick-and-mortar retailer (Australians, think Woolworths scale; Americans, think Walmart scale)
Did the original poster claim that he bought it from Woolworths, or did someone else buy it? I question if the poster obtained the gift card from some path where the original purchaser may have been scammed.
My son was just scammed out of $1000 using some gift card scam. Typically these gift cards cannot be revoked once issued and anyone using the gift cards (like the people who scammed my son) would be able to reap the rewards without any consequences. I’m hopeful that Apple has found a way to track fraudulent Apple Gift cards and are now locking people’s Apple ID who use them. I suspect there’s more to the story than is being shared. What’s the provenance of the original gift card? Could it have been obtained through some not 100% above board means?
jmpman commented on Disks Lie: Building a WAL that actually survives blog.canoozie.net/disks-l... · Posted by u/jtregunna
https://en.wikipedia.org/wiki/Data_Integrity_Field
This, along with RAID-1, is probably sufficient to catch the majority of errors. But realize that these are just probabilities - if the failure can happen on the first drive, it can also happen on the second. A merkle tree is commonly used to also protect against these scenarios.
Notice that using something like RAID-5 can result in data corruption migrating throughout the stripe when using certain write algorithms
The paranoid would also follow the write with a read command, setting the SCSI FUA (forced unit access) bit, requiring the disk to read from the physical media, and confirming the data is really written to that rotating rust. Trying to do similar in SATA or with NVMe drives might be more complicated, or maybe impossible. That’s the method to ensure your data is actually written to viable media and can be subsequently read.
jmpman commented on Disks Lie: Building a WAL that actually survives blog.canoozie.net/disks-l... · Posted by u/jtregunna
https://en.wikipedia.org/wiki/Data_Integrity_Field
This, along with RAID-1, is probably sufficient to catch the majority of errors. But realize that these are just probabilities - if the failure can happen on the first drive, it can also happen on the second. A merkle tree is commonly used to also protect against these scenarios.
Notice that using something like RAID-5 can result in data corruption migrating throughout the stripe when using certain write algorithms
jmpman commented on Disks Lie: Building a WAL that actually survives blog.canoozie.net/disks-l... · Posted by u/jtregunna
I’ve seen disks do off track writes, dropped writes due to write channel failures, and dropped writes due to the media having been literally scrubbed off the platter previously. You need LBA seeded CRC to catch these failures along with a number of other checks. I get excited when people write about this in the industry. They’re extremely interesting failure modes that I’ve been lucky enough to have been exposed to, at volume, for a large fraction of my career.
Any exotic materials required? Just carbon?
jmpman commented on How many hours should employees work? economist.com/business/20... · Posted by u/mohi-kalantari
I remember reading an article about British workers during WW2 who were willing to work any number of hours to beat the Nazis. Initially their productivity spiked as they worked more hours. Eventually it crashed, and they did a study to identify the most productive number of hours. 35.
I remember another article from a Harvard business review where they studied the number of hours worked which was correlated with the highest promotion rate in business. 45.
So, if you’re riveting airplanes, or other manual work, 35 hours per week seem to be maximal. For office work, 45 hours per week at least gets you the best results from the business noticing your effort. I shoot for 45 hours a week on average, but sometimes go as high as 80, when sprinting, and as low as 25, when trying to recover from those sprints. Seems to have worked well for my career and work/life balance.
jmpman commented on Mapping the US healthcare system’s financial flows healthisotherpeople.subst... · Posted by u/brandonb
You're never going to make a system that prevents the ultra-wealthy from augmenting it with private services. You might, however, reduce the power of the ultra-wealthy.
Not after citizens united.
jmpman commented on Mapping the US healthcare system’s financial flows healthisotherpeople.subst... · Posted by u/brandonb
> The only system which will work in the US is one in which the ultra wealthy have an incentive to provide funding to the public system, and that seems like you’d need to force them to be on the public system too.
In my state, I pay $15k/year in school taxes, yet I have no children. I pay $1000/year in property taxes to support my city's library, yet I don't have a library card. People are taxed for lots of things they don't actually benefit from. I don't think we would need to force rich people to use the plans. If they want to buy medical services from private doctors, sure we can let them.
The issue then becomes more about allocation of resources (how many doctors are available to be seen on the public system vs. only available to self-pay customers) rather than the issue being about how to collect taxes.
In my state, the politicians attempt to fund the schools the least amount possible. Healthcare will fare no better.