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Re: Can't initialize RAID disks for ESXi 5.5 U2

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So the problem is, that no matter what type of RAID controller I am using, is it from Intel the RST, or the LSI MegaRAID, and I create a RAID 0 or RAID1 or RAID 5 disk array, when I try to install the system(ESXi Hypervisor) on it, he will find drivers that are separated. For example I have created RAID 0 with 2 Samsung SSD 250GB, and at the initial step of the ESXi installation it shows me 2 separated disks with capacity of 250GB.

You don't have a real hardware RAID controller, but a software RAID aka fake-RAID. This is the kind of cheap onboard controller you find in many desktop motherboards, these are not real hardware RAID controllers.

ESXi does not and has never supported these fake-RAID controllers. They rely on specific drivers and the OS to do the actual work in software and don't present an abstracted a logical volume to the OS as a real RAID controller would do. This is why you still see 2 individual disks even though you created a RAID array.

 

There's no way to "fix" this except getting a real hardware RAID controller. Make sure it's on the HCL:

http://www.vmware.com/resources/compatibility/search.php?deviceCategory=io

http://www.vmware.com/resources/compatibility/pdf/vi_io_guide.pdf

 

Otherwise this controller will only really work more or less reliably in a non-RAID/JBOD mode.


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