Upgrading to ESX 3.5 Update 3 Causes Local VMFS Volume to be Unrecognized (1007724)
This occurs on server hardware ICH-7 SATA Controllers configured in ATA mode. If the controller’s BIOS setting is changed to SATA/AHCI mode, the ESX host may be able to re-recognize the local VMFS volumes. Once this change is made, the ESX host will need to be booted to see a new hardware configuration. Another additional reboot will be required to see the VMFS volumes.