If the SSL certificates used to secure key management communication between the storage system and key management servers expire, the storage system can no longer retrieve authentication keys from the key management server at bootup. This issue can cause data on SEDs to be unavailable. You can prevent this issue by updating all SSL certificates before their individual expiration dates.
SSL certificates have a limited lifespan because they have an expiration date. After the SSL certificates reach their expiration dates, the certificates are no longer valid. When this happens, SSL connections that use expired certificates fail.
For Storage Encryption, this means that the SSL connections between the storage system and the key management servers fail, the storage system no longer can retrieve authentication keys when needed, and data access to the SEDs fails, resulting in storage system panic and downtime.
To prevent this issue from occurring, you must keep track of the expiration dates of all installed SSL certificates so that you can obtain new SSL certificates before they expire.
After you have obtained the new certificate files, you must first remove the existing certificate files from the storage system, and then install the new certificates on the storage system.