Yes folks, it rears its ugly head again…Disk Alignment… If you have not read it yet, check out the whitepaper on disk alignment from VMware.

First, chethan from VMware posted a great thread on VMTN
about I/O performance in vSphere. The start of the thread talks about
I/O, then leads into anice discussion about block size. A couple of
weeks ago, Duncan Epping posted a very informative article about block sizes. It convinced me to use 8MB blocks in VMFS designs.

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