The most common reason why only one flash drive is usble when multiple USBs are connected is due to a device signature collision.
If you are dealing with bootable devices and seeing this problem, we are confident a collision is the issue. If you are not dealing with a bootable device, then our information below will, probably, not help.
What is a USB signature collision?
A signature collision can happen on any bootable device, so Compact Flash cards, SD cards, microSD cards and USB flash drives. A disk signature is a unique identifier number (UID). It is a unique identifier stored as part of the MBR (Master Boot Record) for an operating system loaded on the device. The operating system will use the UID to identify and distinguish between storage devices. It is commonly made up of eight alphanumeric characters. A disk collision occurs when your operating system (Windows) detects that there are two disks with identical signatures.
For Windows 7, 8, 8.1 and 10, these versions of Windows will disable the second drive and will not allow that second volume to mount until the disk collision has been rectified. If you are reading this article, chances are, this is exactly what is happening to you.
The first thing to do is navigate to the Disk Management tool with in Windows. To do this, use the search tool and type in Disk Management. This will take you to the utility that Windows offers. Here you can see your multiple devices connected. If you click or hover over the device not working you will see one of two messages:
Japan has been a long time supplier for three key elements used in the manufacturing of NAND memory and semiconductors. Because of recent trade war issues between Japan and South Korea, these elements are getting very hard to obtain.
Japan produces about 90% of the world’s supply of flurinated polyimide and resists, and about 70% of the world’s supply for hydrogen fluoride. This puts everyone at risk if Japan will not supply those demanding it.
Those chemicals are used by Korean manufacturers to produce semiconductors, and are crucial for making components — including memory chips, microprocessors and integrated circuits.
We have seen the direct impact already. For the first time in over eight months, the price of NAND memory for flash drives have gone up. For each GB capacity the percentage increase is different, but most notably are the 32GB and 64GB wafers. They have jumped nearly 25% from the previous week ( this article was posted on July 25th).
Japan has sited inadequate management of those chemicals by purchasing countries. Said another way, these chemicals can also be used to manufacturer military weapons and Japan is claiming those supplies have been diverted to do just that. Japan’s response; restrictions on the chemicals.
Who will lose from this trade war? None other than any person who uses technology. Cell phones, processors, flash memory, circuit boards, the list goes on.
For a more dry version of this report, and our source visit: here
From this article, the Raspberry Pi 4’s USB-C power port was designed outside of official USB-IF specifications, making it incompatible with many USB-C chargers and/or power supplies. You can read more about from the link above and the information gathered to come to such a conclusion was done by a well known Google engineer, Benson Leung.
The raspberry Pi is a collection of small computer boards put together in a simplistic way to create the foundation of a computer system. The Raspberry Pi (also known as RPi) was released back in Feb of 2012 in the United Kingdom. The original intent of the RPi was to develop a low cost and simplistic computer which students could learn and develop.
The original model became far more popular than anticipated, and started selling outside its target market for uses such as robotics. It does not include peripherals (such as keyboards and mice) or even come inside a case. Literally a bare-bones product.
To give you an idea of the popularity, the RPi products have sold over 19 million units between its release in 2012 to the end of fiscal year 2018. This makes the RPi one of the best-selling computers in the world, although a computer with limited resources. Until now.
This week the Raspberry Pi Foundation has released the Pi 4. This is one hell of a great product. Check out these specifications:
A 1.5GHz quad-core 64-bit ARM Cortex-A72 CPU (~3× performance)
1GB, 2GB, or 4GB of LPDDR4 SDRAM
Full-throughput Gigabit Ethernet
Dual-band 802.11ac wireless networking
Two USB 3.0 and two USB 2.0 ports
Dual monitor support, at resolutions up to 4K
VideoCore VI graphics, supporting OpenGL ES 3.x
4Kp60 hardware decode of HEVC video
Complete compatibility with earlier Raspberry Pi products
In addition to the hardware improvements, the Raspberry Pi Foundation says
Today Apple announced the new iPadOS will support USB thumb drives. The iPad has long been toughted a workers tablet from Apple, but the relaity is their iPad didn’t provide much functionality. In addition, the devices have limited storage.
With today’s announcement the above argument could get a little muted.
Update: We learned the iPad will allow other storage devices such as external hard drives and SD or microSD cards (with USB adapters). The USB port will also allow for HID devices, such as a USB mouse and keyboard. We are not sure if the iPad will support Bluetooth mouse and keyboard, but we’ve got to assume, right!
There is no word about the connection. The connection could be one of three; an adapter, USB-C socket size or the classic USB type A socket size.
In a battle that is so ancient most no longer consider it an issue, Microsoft has gone away with the safe removal for USB flash drives. The original suggestion by Microsoft was to eliminate data lose if a user removed the drive before properly ejecting it.
Nine out of ten times you wouldn’t lose data, unless a large file was being transferred, but it’s nice to see Microsoft adjust to user habits.
The update which includes this change is Windows 10 v v1809. If you are not sure the Windows version you have, simply right click the Windows icon in the bottom left of your screen and select “System“
From the resultant page, you can view the version of your OS.