It is all over the internet, the universal USB connector; however, it is difficult to find the physical design or look of the connector. Most websites are posting old style 2.0 or 3.0 connectors. From reading through the USB.org documentation, we have the following physical design specs.
From the notes in the document, these designs could change, but at least we have an idea.
Is Checksum or CRC better for checking data written to USB flash drives?
This post is to give the general user an idea of what verification method is better for writing data to a flash drive. There are reference links at the bottom of this post which dive much deeper into the two methods of verification if this simple overview is not enough.
The short answer is Cyclical Redundancy Check or CRC is the best method for checking data written to a USB flash drive.
Many believe a checksum is the best method to verify data written to a flash drive (most popular is MD5). I believe this is favored because it is easier to understand how the verification works, and also easier to implement. However, there are flaws in checksum verification and therefore not suitable for verification of data written to a flash drive.
What is the difference between Checksum and CRC verification? The checksum method uses addition in its math calculations to check whether all data was written correctly. CRC uses long division in its math calculations to check whether all data was written correctly. It is worth noting I am talking about binary long division, not the school-yard long division you so fondly remember.
Checksum methods will calculate the total
Alaska Airlines passengers will now be able to use their tablets, book readers, and cellphones all the way from the gate to thousands of feet in the air.
Starting Nov. 9, passengers will be able to use their electronic devices on board the plane, and even use WiFi, at 10,000 feet in the air. Alaska Airlines will start flying its first aircraft with 110-volt and USB power outlets at every seat next month. Most of the fleet will be equipped by the end of 2014.
Lake Forest, CA – November 5, 2013 – Nexcopy Inc., a leading manufacturer and developer of flash memory duplicators, introduces two new standalone SD Duplicator models to Nexcopy’s line of flash memory duplicators and sanitizers. The 1-15 and 1-31 target systems offer unparalleled copy speeds to Secure Digital media with additional functions for device sanitization.
Sanitization features available by the new Nexcopy SD Duplicators include full binary overwrite feature in both single pass and triple pass random write sequencing. The proprietary triple pass overwrite method developed by Nexcopy insures all data of a secure digital card cannot be recovered or restored through forensic process.
These new standalone SD duplicators by Nexcopy can sanitize multiple devices simultaneously saving IT professionals valuable time in flash memory management. Core functions of these new systems include the binary copy process used in the popular Nexcopy USB duplicators systems. Binary copy modes include the ability to copy bootable SD media, FAT, FAT32, NTFS, ext2, ext3, ext4 and any other file format system, proprietary or public.
“Pivoting from our core binary copy firmware, Nexcopy expands our technology to include
The Universal Serial Buss Implementers Forum or USB-IF has released their new specification, USB 3.1. The full spec will be available for download off the USB-IF website on Friday Aug 2, 2013. The new specification allows for 10Gb/s transfer rate. Of course this is optimal transfer speed without the incurrence of operating system resources trying to regulate bandwidth for multi device transfers, but none-the-less it’s a huge jump in speed for USB.
USB is the most versatile connector type in the computer market. Universal Serial Bus (USB) is an industry standard developed in the mid-1990s that defines the cables, connectors and communications protocols used in a bus for connection, communication, and power supply between computers and electronic devices.
Originally USB was specific to connect computer peripherals such as keyboards, pointing devices, digital cameras, printers and network adapters. With the increased need for bandwidth with digital content and the faster speeds of portable storage devices and smartphones the need to increase the speed of USB has been significant.
In addition the USB specification incorporated a Power Delivery or PD protocol which can deliver up to 100watts of power over a USB cable. The PD technology must use a certified cable with the Power Delivery wiring so not all USB cables will have the PD ability. The intent is to permit uniformly charging laptops, tablets, USB-powered disks and similarly higher power consumer electronics, as a natural extension of existing European and Chinese mobile telephone charging standards.
With the increased 3.1 speeds and the power ability of 100watts per cable it appears USB has made a substantial gain in the cable of choice for manufacturers and consumers a like for connecting their peripherals to their host computers.
The USB 3.1 specification is just now in development and products should come to market in the next 8-10 months.
Planon is known for having pen-sized scanners for mobile scanning of business cards, documents, lecture notes and more. What Planon continues to do is develop the scanning technology year after year.
The company has just released it’s latest pen scanner, the ScanStik SK600V. The V is for Voice Notes. It’s now possible to scan from a device the size of a writing pen and include voice memos for the scanned document. Nice.
They have also added bluetooth connectivity, but apparently the “b” didn’t make it into the updated part number.
You can scan at 600dpi (dots per inch) and save the file to a microSD card. Once you are ready for download, you can connect to a host computer via USB and off-load all those trade show business cards (or competitors spec sheets of that product not yet released).
Minecraft has taken on a life of it’s own. From 5 year old kids being obsessed with Minecraft to adults making movie trailers it’s a strange little obsession for digital lego’s that look like CAD drawings.
Either way, you might find this post useful for how to make a portable Minecraft USB stick. With a portable version of Minecraft you can now play the game anywhere, school, library, work, you name it.
This is how you do it:
- Download portabal_minecraft.rar
- Extract Minecraft folder to Memory stick *Need program to extract .rar file, just Google “extract rar”
- Open the Run.exe
- Log into your Minecraft account and let it update for you
- That’s it!
The resultant USB will have several items in the root of the USB.
- .minecraft folder with all your assets
- Minecraft exe file which is the program
- Start.bin file, which generates Minecaft when you start
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