Optimizing performance by aligning the I/O of misaligned virtual machines non-disruptively
Virtual Storage Console for VMware vSphere can scan your datastores to determine the alignment status of virtual machines. You can then use VSC to functionally align the I/O to certain misaligned virtual machines without having to power them down.
About this task
Online alignment is a good choice for virtual machines that you cannot take offline. When possible, you should take the virtual machine offline and physically align the VMDK using a tool such as VMware vCenter Converter.
Check the alignment status of virtual machines
Check the alignment status of a virtual machine to determine whether it is aligned or misaligned. You should fix the alignment of a misaligned virtual machine to optimize I/O performance.
Align the I/O to any misaligned virtual machines A misaligned virtual machine can negatively affect I/O performance. To correct the misalignment, Virtual Storage Console for VMware vSphere can migrate a virtual machine to a new or existing optimized datastore so that the I/O is functionally aligned. This process does not require downtime.