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SCSI and SATA controller Limitations.

Its been a while that I worked on a blog post, now I am really happy to be back.

Recently, I was performing some tests on using Multiple Storage Controllers on a Virtual Machine. I noticed that adding different types of storage controllers to virtual machine that use BIOS firmware can cause operating system boot problems.

In the following cases, the virtual machine might fail to boot correctly and you might have to enter the BIOS setup and select the correct boot device.

■ If the virtual machine boots from LSI Logic SAS or VMware Paravirtual SCSI, and you add a disk that uses BusLogic, LSI Logic, or AHCI SATA controllers.

■ If the virtual machine boots from AHCI SATA, and you add BusLogic Parallel or LSI Logic controllers.

VMware Reference Article -


We can use EFI as the Firmware mode, where we can avoid this issue. But please note that, you will need to install the OS using EFI in-order to use that. 

I am in the process of writing an article specifically for EFI Firmware. I shall have it posted by July 2nd week.

NOTE - VMware does not recommend using Multiple Storage Controllers on a Virtual Machine.

Versions Affected - 5.5, 6.0 and 6.5.
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