Random Tech Questions you want answered.

T-Prime wrote:

Besides stuff I can save for offline from Prime Video, what apps for Kindle Fire can I use for playing movies and media files off the microSD card?

VLC will play local stuff. Netflix should also allow downloads.

Does anyone know if it's possible to use Parallels on macOS to access Windows that logs into a domain?

Why are random access read speeds on microSD cards so much worse than sequential?

PaladinTom wrote:

Does anyone know if it's possible to use Parallels on macOS to access Windows that logs into a domain?

It looks like it is doable as long as you have a version of Windows installed in the VM that supports joining domains (i.e. Windows 10 Home doesn't support domains inside or outside of VMs).

Kurrelgyre wrote:

Why are random access read speeds on microSD cards so much worse than sequential?

This is a total guess, but I expect that's down to them being meant for use in cameras. When you're shooting video or a lot of pictures then you have to be sure you can write them to your media fast enough. Cameras used sequential media from the beginning for a reason. Since cameras need the sequential access, it makes sense to optimize your media for it.

Kurrelgyre wrote:

Why are random access read speeds on microSD cards so much worse than sequential?

Quick Google suggests that it's because the data is grouped into blocks. To write to a block, you first have to erase it. Random access implies erasing each block you want to write to, and potentially not writing the entire block, whereas sequential access implies writing to the entire block you've just erased.

So with random access, you're spending a lot more time erasing compared to the amount of date you're writing.

PaladinTom wrote:

Does anyone know if it's possible to use Parallels on macOS to access Windows that logs into a domain?

Should be fine -- I run a domain-joined Win10 VM via Virtualbox with no issues.

Kurrelgyre wrote:

Why are random access read speeds on microSD cards so much worse than sequential?

To emphasize what I originally wrote, it was differing read speeds that I was confused by, e.g. the benchmarks in this review.

Kurrelgyre wrote:
Kurrelgyre wrote:

Why are random access read speeds on microSD cards so much worse than sequential?

To emphasize what I originally wrote, it was differing read speeds that I was confused by, e.g. the benchmarks in this review.

The faster something can output data, the more individual instructions impact its throughput as processing instructions is a larger percentage of a single operation.

Sequential reads take fewer instructions to implement. The SSD is able to output as close to its maximum theoretical speed as possible when it's essentially streaming big blocks one after the other. This test shows it at its theoretical best.

When you're telling it to output random things that are 4KiB in size each, you're sending it a ton of instructions and making it retrieve many small things one at a time. This shows it at its theoretical worst.

EDIT: It is interesting to note that the mechanical portion of implementing instructions slows down HDDs in the same manner. Processing didn't matter so much with them as you were dealing with physical limitations. Freed from those physical limitations, we still aren't freed from having something as a bottleneck, and it's encountered using the same test which brought HDDs to their knees.

So I use a 60% keyboard at home, and have gotten used to using Fn+ijkl for the arrow keys when typing. Since I recently got a desk job I brought my old Ducky Zero to work but am missing my navigation shortcuts. Is there a way to map Fn+ijkl to the arrow keys in Windows, and hopefully, Fn+h to Home and Fn+n to End?

stupidhaiku wrote:

So I use a 60% keyboard at home, and have gotten used to using Fn+ijkl for the arrow keys when typing. Since I recently got a desk job I brought my old Ducky Zero to work but am missing my navigation shortcuts. Is there a way to map Fn+ijkl to the arrow keys in Windows, and hopefully, Fn+h to Home and Fn+n to End?

https://www.autohotkey.com/

A favorite.

Thanks. After downloading and playing with it for awhile though, it looks like the Fn key on this board isn't actually reporting anything to the OS, so no fun navigation for me.

I hope this is a reasonable place to ask this question, if no, please let me know!

Is there a safe place to download windows ISO files? Specifically, windows 7 home premium 64bit. Trying to help a friend by wiping his hard drive and reinstalling his OS, I have the cd key, but the microsoft website is throwing an error code and won't let me get the file.

Dakuna wrote:

I hope this is a reasonable place to ask this question, if no, please let me know!

Is there a safe place to download windows ISO files? Specifically, windows 7 home premium 64bit. Trying to help a friend by wiping his hard drive and reinstalling his OS, I have the cd key, but the microsoft website is throwing an error code and won't let me get the file.

Maybe someone at Microsoft Support could help. They were a huge help to me when NewEgg sold me a bad Windows 10 Pro Key.

They can also use the key to install Windows 10.

I appreciate that responses, but the friend doesn't want windows 10, and I don't think the key is bad. He's had the computer for over 6 years.

I'll see what we can do tonight.

I guess that means if you want proper ISO files you have to get the from the Microsoft page? I'm not looking for anything of questionable legality, I was hoping they had some kind of authorized mirror sites or something.

I have just gotten them from Microsoft, I didn't even think you had to put in a key for the download?

LeapingGnome wrote:

I have just gotten them from Microsoft, I didn't even think you had to put in a key for the download?

Then I wonder what I'm doing?! I'll check it out again tonight when I get home.

Sorry maybe Windows 7 is different? From what I remember with Windows 10 you don't put in the key until you activate on the installing computer.

You do have to put in the product key to get a guaranteed legit copy, but you can get it free if you or someone you know has a paid VS subscription.

Dak, I've got my original Win 7 Home ISO that I think includes 64-bit support, but can't say for sure 100% since I haven't used it for years. I can send you a link if you want to try it.

I thought you could download various ISOs from Microsoft via the windows download tool or something, this was when I was building my machine for windows 9 and right before the convert all to 10.

LeapingGnome wrote:

Sorry maybe Windows 7 is different? From what I remember with Windows 10 you don't put in the key until you activate on the installing computer.

Yea they don't require one for Windows 10 but they do for 7. Maybe you could find a torrent and a checksum somewhere. My key is for the Pro version otherwise I might have been able to provide a link/download.

I have a Windows 7 UK version disc lying around here somewhere. I could create an ISO from it and somehow share it with you, if you help me with the technical part.

Not sure if a US license key would work on the UK version though.

Thanks dejanzie, Chairman_Mao already hooked me up!