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Available Space Misreported by USB drive?, Part 2

A recent question raised a red flag in my mind. I think most, if not all, of you read my 'brief' description of about what happened to the missing 32 MB on a 512 MB Thumb Drive: Available Space Misreported by USB drive? Allow me to explain in ... greater detail. On a hard drive, thumb drive, or any other storage device in common use, the capacity displayed on the carton is the maximum 'raw' or usable number of bytes the device can hold. However, a device that 'says' it can hold 512 MB of data will not display the number 512 MB after it has been formatted. As stated in the previous article , some ... (view more)

Dennis Faas's picture


A checksum is a form of redundancy check, a very simple measure for protecting the integrity of data by detecting errors in data that is sent through space (telecommunications) or time (storage). It works by adding up the basic components of a ... message, typically the bytes, and storing the resulting value. Later, anyone can perform the same operation on the data, compare the result to the authentic checksum, and (assuming that the sums match) conclude that the message was probably not corrupted. The simplest form of checksum, which simply adds up the bytes in the data, cannot detect a number ... (view more)

Dennis Faas's picture

Problems running DOS applications in Windows?, Part 2

Recall -- Yesterday, Infopackets Reader Don R. asked if I had any suggestions for running old DOS programs in a Windows environment. In my response , I provided some links to sites with helpful DOS / Windows information (especially for games), but ... then asked Infopackets Readers for additional info. DOS-enthusiast Mike K. writes: " You're welcome to 'steal' anything useful from my website ( In particular, you might take a very quick look at LesSpace, PatchCRT, and some long-winded notes on running 'Old-Apps' in newer OSes and PCs. If you or any of your Readers have ... (view more)

Dennis Faas's picture

Using Trace Route and Ping to trace pathways on the Internet

Tracert.exe? Ping.exe? What the heck is that? Trace Route (tracert.exe) is a DOS command line utility program that traces connection pathways along the Internet using the TCP / IP protocol. Ping (ping.exe) calculates how long it takes to transfer a ... packet of information from origin [you] to destination [a web site] and back again [to you]. What is TCP / IP? The TCP / IP protocol is a method used to communicate computers on the Internet. Any computer using the TCP / IP protocol has a unique address, referred to as an IP (Internet Protocol) address. An IP address can be thought of as a special ... (view more)

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DNS Propagation

Well, it finally looks like has completed its journey over to its new web server. The entire process (from start to finish, including changing registrars ) took about 60 days to complete. Most importantly, my own personal computer is ... finally connecting to the new web server. The hard lesson learned: while most web service providers are eager to say that a change like this "should only take 72 hours to complete", just remember -- anything that could go wrong probably will, and expect the worse case scenario. OK, I expected that. But I think I got hit with worse than ... (view more)

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