Designing for nondisruptive upgrades
Non Disruptive Upgrade (NDU) began as the process of upgrading Data ONTAP software on the two nodes in an HA pair controller configuration without interrupting I/O to connected client systems. NDU has grown since its inception, and now incorporates the nondisruptive upgrade of system firmware as well.
This chapter covers NDU for the following areas:
•System operating software (Data ONTAP) and firmware (BIOS)
•Alternate Control Path (ACP) firmware
The overall objective is to enable ...