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SD Association Unveils microSD Express Format That Promises Transfer Speeds of Up To 985 MB/s (engadget.com)
The SD Association has unveiled microSD Express, a new format that will bring speeds of up to 985 MB/s to the tiny memory cards used in smartphones and other devices. From a report: Like SD Express, it exploits the NVMe 1.3 and PCIe 3.1 interfaces used in PCs to power high-speed SSDs. The tech is incorporated onto the second row of microSD pins, so the cards will work faster in next-gen devices while maintaining backward compatibility with current microSD tech. PCIe 3.1 allows for low power sub-states, so the cards will not only offer much (much) higher transfer speeds, but consume less power than regular microSD cards. It'll also open up features like bus mastering, which lets memory cards communicate with other components without going through the CPU first.
... bus mastering being used in an Intel processor exploit in 10, 9, 8 ...
microSD Express format supports up to 985 MB/s not 985 Mb/s.
MB/s is megabytes (1,000,000 bytes) per second.
Mb/s is megabits (1,000,000 bits) per second.
References:
https://www.sdcard.org/press/T...
NAND is limited by how many chips are stacked behind the controller. microSD is limited to a single chip. This is why, even with current 90MB/s rated microsd, you still get 7MB/s speeds from it once you fill up the controller buffer. NVMe on a single chip shitNAND? lol. this is pure marketing bullshit.
Where nothing can possiblye go wrong!
Not sure if the article was updated, but it's 985 MB/s, so almost double the 500 MB/s you listed for desktop storage. So the small size should be fine for speed.
The speed is actually 985 MB/s not 985 Mb/s. The article was wrong. See https://www.sdcard.org/press/T...
When you see "985MB/s transfer speeds", I suspect that you're assuming that the card can read and write data at this speed all day long.
But, I suspect that there are limits in terms of writing and accessing data. I'm sure burst speeds of 985MB/s is possible (with longer read bursts than write) but the overall/average speed will probably be 20-50MB/s, which is still very good, but not what you're being lead to believe.
Mimetics Inc. Twitter
I don't know about these new cards but "A1" and "A2" cards have higher IOPS than others. SanDisk Extreme microSD Cards with A2 IOPS are at least 4000 read and 2000 write.
W.C. who? Fields? I never heard him say that!
I am personally OK with the tradeoff of much better local performance, for an increased security risk around physical presence.
After all, a hardware maker can do things to make sure ports are disconnected when systems are locked, or in the most drastic cases you can physically render external ports inoperable.
"There is more worth loving than we have strength to love." - Brian Jay Stanley
I mean, what is has it been -- 5 years at least that 10GBase-T has been out, and it's still expensive?
Are network gear makers just charging a premium because there's still a lot of business/enterprise upgrading to be done or because they don't have anything else "premium" to offer once 1 Gbit becomes as obsolete as 100 Mbit?
Or is it just the industry not bothering to mass produce it because 1 Gbps is like 640k, it ought to be enough?
It was said in a water closet.
One, if the hardware maker is not the OS maker, they can only provide hooks and leave it up to the OS.
For desktops that is probably true, although they could have a "lock system" button... you could put it right next to the "Turbo" button some systems used to offer. :-).
For laptops though, the hardware maker could easily have some kind of physical interlock that disabled anything but power (or even that) to outside ports until the case was opened. The problem there of course, is people that want to run laptops docked which is probably why no-one has done that....
Two, I don't want all my storage unmounting every time I walk away from my desk.
That is the problem with that approach, if you controlled both hardware and software you could disable all ports not actively connected, and disable that if anything was unplugged.
In the end though how IOS does it is probably a pretty good compromise, if nothing is connected for several hours disable the hardware port until the system is unlocked (there again on desktops it would have to leave anything already connected from system lock).
"There is more worth loving than we have strength to love." - Brian Jay Stanley
I want an SD card that lasts long and fails gracefully
Go for a "High Endurance" card. They're designed and marketed for use in dash-cams and other loop-recording devices, where constant heavy writing is expected to occur.
Transcend was formerly the gold standard for these, although it now looks like Samsung is the current top performer.