5. Troubleshooting
Express5800/R120h-1M, R120h-2M (2nd-Gen) Maintenance Guide
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Chapter 1 Maintenance
5.3
Problem of Installing OS
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Unable to create a partition when installing Windows Server 2012 R2
Is the following message displayed?
The message above means that you failed to create a partition. In this case, delete the partition you
attempted to create, and then create a new partition.
If you have connected a data disk to a partition, be careful not to delete that partition.
For details, refer to the Microsoft website below:
Windows Server 2012 R2
https://technet.microsoft.com/en-us/library/dn387077.aspx
[?]
Unable to install OS
Is the hard disk drive properly installed?
Make sure that the hard disk drive is installed securely and that cables are properly connected.
Is the disk format correct?
Follow the table below to create a partition depending on the boot mode.
Boot mode
Disk format
UEFI Mode
GPT (GUID Partition Table)
Legacy Mode
MBR (Master Boot Record)
For example, the following message appears if an MBR disk is specified as the system drive of
Windows on UEFI boot mode.
To change the disk format, clear the partition configuration and create a new partition. All of the data on
the hard disk drive will delete. Back up necessary data before clearing the partition configuration.
Did you configure the RAID controller?
For a RAID system, use EXPRESSBUILDER or RAID Configuration Utility (Off-line Utility or LSI Software
RAID Configuration Utility) to properly configure the RAID controller before installing OS.
