The server is Proliant ML330 G6. I've activated the embeded SATA RAID in BIOS. Created 1 logical drive in "Option Rom Configuration for Arrays" in RAID 0+1 that consists of two 1TB drives. So in other words I have 1 TB storage because of RAID1. I tried to install ESXi 5.5.0 on that server, but when I get to the screen where I need to select where to install the ESXi I see those two drives. I can choose one of them.
Shouldn't I see only one RAID1 logical drive?
Best Answer
Sounds like you're using software assisted RAID (aka "FakeRAID") and don't have the proper (driver) support for it in ESXi.
Head to VMWare's site and use the VMWare Compatibility Guide to determine if your version of ESXi is compatible with your RAID controller.
Here's a similar question from ServerFault, in which the accepted answer notes tha thte RAID controller isn't supported: