Importance of disk alignment for Windows Server 2012

I saw article about Disk alignment here and also here.Also there where some references that windows server 2003 has some problem with disk alignment. After reading article I am confused whether we need to align the Disk alignment manually or it will be done automatically when we do partition the disk. What we do generally is when installing OS we perform disk partition and then for extra disk which added we do partition by using diskmgmt.msc(Disk management) So whether we require to do any alignment for windows server 2012 server also?

Windows Server 2008 and newer versions will automatically align partitions optimally. There's nothing you need to do. This was a problem in older versions of Windows. The first paragraph in the summary section of this Disk Partition Alignment Best Practices for SQL Server whitepaper makes mention of this functionality (the paper is SQL Server-related, however the statement about partition alignment is generic to Windows Server).