One of the most commonly used tools is mbralign from NetApp. It's a tool that is available to NetApp customers through NOW. It was earlier a standalone tool (actually two tools: mbrscan and mbralign), but is now part of FC Host Utilities for ESX. This is a tool meant for installation on ESX hosts and is incompatible with ESXi which is now the new default hypervisor.
It *is* however possible to use mbralign from vMA if you're having NFS data stores. If you're using block storage (FC/iSCSI/FCoE) you will need to wait until NetApp releases mbralign for ESXi. To mount NFS data stores you must first start the nfs and portmap services and then mount the data stores in the vMA. Note that the FC Host Utilities will not install into vMA by default.
The solution is to manually unpack and move the directories into the right place.
To make things easier we put the new binary directory into PATH by editing the ~/.bashrc file:
You can run "sudo mbralign -scan filename.vmdk" to check if the VM disk needs to have it's partitions aligned. To align you simply run "sudo mbralign filename.vmdk"
To check what we gained from this alignment operation we ran iometer before and after and the results were as follows:
These numbers speak for themselves. Alignment had a good impact on this system.