Cisco has published an important field notice related to an issue with certain SSDs built into UCS servers. This includes appliances built on UCS servers (such as DNA Center and ISE).
After 40,000 power-on hours (4.5 years), the SSD will become unusable which inevitably leads to loss of your data.
As a solution, Cisco has published firmware updates on its website.
If you need assistance identifying your system or installing the update, please get in touch with your account manager.
If you wish to be notified by Cisco of future field notices, you can configure your notifications here: cway.cisco.com/mynotifications.