This article will show you how to create an ISO CD-ROM/DVD-ROM image (*.iso), and MD5 checksum signature, for use with VMware vSphere Hypervisor 6.5 (ESXi 6.5). It's a good idea to compare checksums, because many installations fail because of a corrupt iso image.
In my previous
Experts Exchange Articles
, most have featured Basic and Intermediate VMware and Virtualisation Topics.
If you would like to read my Basic VMware articles, they are listed at the end of this article for your convenience.
In this series of basic VMware articles for the Novice, I'll be showing you the basic VMware skills required to install, configure and deploy virtual machines using VMware's
VMware vSphere Hypervisor (ESXi).
What is an ISO? (Andy's Laymen Definition)
An ISO is an image or bit copy of a CD-ROM/DVD-ROM, the ISO is a file, similar to a compressed archived file, this *.iso file contains the data from a CD-ROM/DVD-ROM. The ISO file is a virtual CD-ROM/DVD-ROM. Using an *.iso file has many advantages, some are listed below:-
The original CDROM/DVD-ROM can be stored securely, and is no longer required, after an ISO image has been created.
Multiple virtual machines can use the same *.iso concurrently.
Computers without a CD-ROM/DVD-ROM reader can use the data stored on the *.iso file.
Installing OS (operating systems) or transferring data is faster.
. We like to use
, because it is a small lightweight application, and there is a portable version which does not have to be installed. In this article, I'm using the installable 64 bit version - InfraRecorder Windows Installer 64-bit.
Select the required language and Click OK and continue
at the Welcome to the InfraRecorder Setup Wizard, Click Next to continue
Click "I Agree" to Accept the terms of the License Agreement.
Select all the components that are required, and Click Next to continue.
Select the Install Location, and select Next to continue
Click Close to complete the installation.
The installer will Complete the software installation, it only takes a few seconds to complete. Click Close to complete the installation.
3. Create an ISO image file
Insert an original operating system CD-ROM/DVD-ROM into your optical media device. In this example, we are using an Microsoft Windows NT Server 4.0 CDROM.
Click Read Disc.
Select your CDROM drive, and enter a valid Windows filename and click OK to create the ISO.The data will be copied from the CD-ROM/DVD-ROM, and the ISO image will be created.
This can take several minutes to complete.
Select OK to complete the operation. The ISO image file has been created.
4. Creating a MD5 checksum signature of the ISO image file
We will use the
MD5 & SHA-1 Checksum Utility
to create a MD5 checksum signature for our freshly created ISO image file. This is important, so we can compare these signatures, once we have completed the transfer to our VMware host servers, and confirm the ISO image file has not been corrupted in transfer.
Double-Click and start the MD5 & SHA-1 Checksum Utility 2.1 application. Click browse and select your freshly created ISO image file.
Shortly after selecting the ISO file, the application will start calculating the MD5, SHA-1, SHA-256 and SHA-512 checksums for the file, this can take a few minutes depending upon the size of the ISO image file, which needs to be read.
The MD5 checksum for my WindowsNTServer40.iso are:-
MD5 Checksum: 205AFCB572EA557C2E63E3292B
SHA-1 Checksum: 17BED61D821BBB2FAD15F40E3D
SHA-256 Checksum: 59D5C50B94ED575EC3C6CC5F62
SHA-512 Checksum: F093B1E1F96C81B38FB098158D
Generated by MD5 & SHA Checksum Utility @
Please note the MD5 checksum value for use with the VMware vSphere Hypervisor 6.5.1 (ESXi 6.5)
Congratulations you have successfully created your first ISO (*.iso), and created a MD5 checksum signature for use with VMware vSphere Hypervisor 6.5 (ESXi 6.5).
In my next Article in this series, we will show you HOW TO: Upload and Check the MD5 signature of an ISO CD/DVD image to a VMware datastore using the VMware Host Client, for use with VMware vSphere Hypervisor 6.5 (ESXi 6.5)
Basic VMware Articles Series:
These articles are also applicable to VMware vSphere Hypervisor ESXi 5.0, 5.5 and 6.0.