Category Archives: Computers

Error Creating Snapshot On virtual Machine: Cannot Write To MultiExtents

You may receive a “disk is full” error when trying to create a snapshot of a virtual machine in vSphere ESXi 5. If the machine is powered on, it will also crash and be powered off. Any attempts to power on will result in disk read failures.

The operation on the file “/vmfs/devices/multiextent/42b5fd59-Ad Server-0000010s001.vmdk” failed (Invalid argument). The file system where disk “/vmfs/devices/multiextent/42b5fd59-Ad Server-0000010s001.vmdk” resides is full.

You may see an event log similar to this one:

VMware ESX cannot synchronize with the disk before canceling. Disk /vmfs/devices/multiextent/42b5fd59-Ad Server-000001-s001.vmdk may be inconsistent.

The cause of the problem is not having a working directory set in your virtual machine configuration file. In my case, the virtual machine was moved from VMware Server 2 to ESXi 5. Because of this move, the working directory was not specified. To repair, shut down your VM and add the following to your VMX config file Continue reading Error Creating Snapshot On virtual Machine: Cannot Write To MultiExtents

PHP Warning: date_default_timezone_get(): It is not safe to rely on the system’s timezone settings


PHP Warning: date_default_timezone_get(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected 'America/New_York' for 'EDT/-4.0/DST' instead in /var/www/vhosts/adserver/httpdocs/lib/OX/Admin/Timezones.php on line 158


Edit php.ini and add appropriate timezone.


List of timezones are available here:

Disable Google Talk Voice Chat Microphone Auto-Adjust

Auto-adjusting microphone levels can be annoying for some. Here is how you can turn off the auto volume control of the Google Voice chat plug-in.

  • Close your web browser
  • Open regedit
  • Go to: HKEY_CURRENT_USER\Software\Google\Google Talk Plugin
  • Change the value of “audio-flags” to 1. It is probably set to 3 currently
  • Close regedit and restart browser

Firefox 5 Hidden Extension Redirecting Google Searches to Spam Website

Using GooredFix, I was able to remove a malicious Firefox extension. This extension is not all over the internet currently, but apparently present to the few websites I visit each day. It installs without permission and causes every other clicked Google search result to redirect to a fake search engine site.

Deleting HKEY_LOCAL_MACHINE\Software\Mozilla\Firefox\Extensions\\{EFB5AF1A-EB6E-4A28-AEF7-FDD4FBB4B353} -> Success!
Deleting C:\Documents and Settings\Administrator\Local Settings\Application Data\{EFB5AF1A-EB6E-4A28-AEF7-FDD4FBB4B353} -> Success!

Adding additional field to X-cart 4.4.x ACH/electronic check payment method

By default, X-Cart 4.4.x does not provide some additional fields that would be very useful to fight fraud. This payment method is great for a secured x-cart store to collect payment information to be used offline instead of being used with a real time payment gateway. However, offline payment methods require a little extra homework from the store owners to ensure that an account it not being used fraudulently. The default fields for the ACH/Electronic Check payment method are “account owner”, “bank account number”, and “bank routing number.” Once an order is placed, this information is encrypted as part of the order details and is Continue reading Adding additional field to X-cart 4.4.x ACH/electronic check payment method

Optimizing Website Performance On Apache

There are three easy things that you can do to optimize a website’s load time on an Apache server. The first thing is to compress the web page output that is sent to the client with mod_deflate. The second thing is to enable or allow browser caching on the client’s end. The third is to enable http keep-alive requests. The following will be a brief example of how to enable these features. Continue reading Optimizing Website Performance On Apache

Prevent *Zone.Identifier* Files From Windows On Samba Shares

If you have a Samba file server and windows client network, you’ve come across these annoying files at some point. They are added by windows and some say it is for “Security” purposes. Windows may show these files as ‘WDFGH~8’ as the files name. Since that is not the true file name on the Samba system, the files will be untouchable except by the server os. On the Samba server, the file names will appear as ‘:encryptable:$DATA’ ‘:favicon:$DATA’ or ‘:zone.identifier:$DATA’.

To prevent these files from being a problem, you need to add this line to your smb.conf somewhere in the [GLOBAL] section.

vfs objects = streams_xattr

Once added, simply restart and the problematic files will no longer be visible. If you wish to delete these files from the actual file system on the server, you will need to do that manually or problematically if you have the skill to.

Install ioncube and zend optimizer on linux and plesk

To install Zend Optimizer and Ioncube Loader, you will need to download the packages according to your version of PHP on Linux. In this case, the PHP version is 5.2.

Download these packages and extract them to a place of your choice on your Linux server. I chose to save them to /usr/local/lib/zend/ and /usr/local/lib/ioncube/ respectively.

Continue reading Install ioncube and zend optimizer on linux and plesk