You can select when to format the disks of the new ESXi hosts - during or after the installation.


  1. Select when to format the disks on the Format Disks page.
    Option Description
    Format disks on first access Disks are formatted after installation on first read or write. Takes less time for installation.
    Format disks immediately Disks are formatted during the installation with zeroes. This requires additional time during the installation process, but result in improved disk performance until all disk blocks are written to. After that, the difference in performance between the two choices is unnoticeable.
  2. Click Next.

What to do next

Review the the configuration of the replacement VSA cluster member.