There are two way to deal with.
Method 1:pull out one hard disk and only use one to install operating system.Finish installing ,then mount the other one.
Method 2:double hard disk do RAID.
1、 check the complexion of hard disk by entering BIOS（BIOS->Boot->hard disk drives）：
If it displays the picture above ,it expresses only one can install normally;if it dosen’t display this ,it expresses it cannot identify and need set by the underside steps.
2、 Entering RAID view:
please press ctrl c ,it will display the underside.
3、 RAID operation step:
input enter key,entering RAID parameter setting:
explanation:this picture is the cutting chart of RAID installing again successfully,if your new blade need do RAID ,entering first time ,there is no option of View Existing Array.It only has three options of create and show this aim at different number of hard disk,we often do two hard disk ,so we choose option of create IM volume:
explanation :this picture is the cutting chart of View Existing Array option ,the interface of create IM volume is the same with this interface ,but the raid disk option all display NO,driver status option is NA ,it is OK when you change the raid disk option to yes .which hard disk of raid disk option change to yes first,its option of driver status change to primary automatically.Finish creating ,you need choose the option of manage array to enter the next interface:
choosing synchronize array to synchronize the hard disk ,it need long time ,you can do somenthing else.After finishing the synchronize ,it is OK ,you can execute the command of View Existing Array to check the configuration:
OK,then exit and choose save changes and reboot:
It can install system by double hard disk ,but when we use USM network to install ,we should check if the PC which han been installed USM start sygate security agent software ,If it starts we need to turn it off,it can be turned off by using command of smc-stop on the start-running.