Disk time percentage and disk queue length
IT professionals think of hard disk corruption or inadequate disk space as the cause of most system performance problems, but disk time is an equally important performance factor. Disk time is represented as a percentage of time that the hard disk is in use. If the hard disk is running 80 percent of the time, for example, you can be sure that system performance is suffering.
Another factor to consider is the average disk queue length, which refers to the number of processes that are waiting to use the hard disk. Using the disk time percentage in conjunction with the disk queue length will tell you not only how much the hard disk is being used but also if the heavy usage is a problem. For example, if the disk time is 40 percent but the average disk queue length has a factor of two or less, then the hard disk is keeping up with the demand that’s being placed on it. Read the rest of this entry »
Well after moving on to Vista, there are a few features of Windows XP that I miss. One of them is the Backup Utility of XP. Although Vista has its own backup utility, it has some disadvantages over xp NTbackup utility. Lets say you want to create a backup of just one folder containing images and docuements that you just finished working on. How would you do this in Vista? Well you can’t. Vista will not allow you to create backup of individual files, and here is where the flexibility of XP Backup Utility comes in handy. Another reasone is the fact that you can’t backup EFS protected files in Vista. So here is a step by step article on how to restore your NTbackup utility from XP to Vista. Read the rest of this entry »
Just the other day, I deleted my recycle bin on accident. It took me awhile to find it but this is how you recover the recycle bin if you delete it from your desktop.
1- Right-click on the Windows Vista desktop and choose Personalize.
Ophcrack live cd is by far the best windows password recovering/cracking tool out there, because of its simplicity and how fast it cracks relative complex passwords, it cracked my 11 character password in less than 3 minutes, and if you are a Network Administrator or computer users in general, you could absolutely appreciate the usefulness of this tool. The tool is open source and free to download and use (at your own risk )… the technology it uses for breaking the windows password is “Rainbow Tables” and is a Time-Memory trade off. An easy way of describing this would be that Tables of possible Hashes are precomputed so that you can iteratively compare the windows hashes to precomputed bits and piece together the hash and its value more quickly than brute-force guessing. Well in this article we will go over the process of cracking a Windows XP password. (The process is the same for Vista except you would download the Vista live cd). Read the rest of this entry »
Not too long ago, I decided to install my bartpe onto a usb flash drive, as most modern pc today are capable of booting from usb devices, and in the process I thought of making it a dual boot with one of my favorite distros (Backtrack3) so for this tutorial we will go over the process of installing UBCD4win and Backtrack3 onto a usb flash drive in this case I use a 2Gb Sandisk. What is UBCD4win? well, is an application that is used for installing bartpe(bart preinstalled environment) on to a cd or usb flash drive from a windows xp install cd, very useful for repair and maintenance task. It will give you a complete Win32 environment with network support, a graphical user interface (800×600) and FAT/NTFS/CDFS filesystem support. Very handy for burn-in testing systems with no OS, rescuing files to a network share, virus scan and so on. Here you can find a complete list of tools that will be already built in your bartpe install . You can think of bartpe as a cut down version of windows xp. Read the rest of this entry »
I recently decided to upgrade my laptop to windows Vista, which was in a dual boot configuration between windows XP and Ubuntu, after the upgrade I was no longer able to boot into Ubuntu, and that is because the last OS installed usually overwrites the MBR (Master Boot Record), so in this tutorial we will go over the process of bringing your pc back to dual boot after upgrading your XP installation to Vista, on a side note, don’t forget that this method described here puts GRUB back in the MBR (Master Boot Record) of the hard drive instead of the root partition, this is usually fine, unless you have an alternative boot manager like Boot Read the rest of this entry »
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