Explanation: This is because before decommissioning an IT system, it is most important to ensure that the data stored on the system is handled according to the retention policy of the organization. A retention policy is a document that specifies how long and where different types of data should be kept, archived, or deleted, based on the business, legal, and regulatory requirements. Assessing compliance with the retention policy can help to avoid data loss, leakage, or breach, as well as comply with the applicable laws and regulations.
Assessing compliance with environmental regulations is not the most important action, as it is a secondary consideration for decommissioning an IT system. Environmental regulations are rules that govern the disposal or recycling of IT equipment and materials, such as batteries, cables, or monitors, in order to protect the environment and human health. Assessing compliance with environmental regulations can help to reduce the environmental impact and waste of IT resources, as well as avoid fines or penalties. However, assessing compliance with environmental regulations does not address the primary concern of data management and security.
Reviewing the media disposal records is not the most important action, as it is a subsequent step after assessing compliance with the retention policy. Media disposal records are documents that provide evidence and verification of the proper disposal or destruction of IT media, such as hard drives, tapes, or disks, that contain sensitive or confidential data. Reviewing the media disposal records can help to ensure that the data on the IT system is erased or overwritten in a secure and irreversible manner, as well as comply with the audit and accountability requirements. However, reviewing the media disposal records does not provide a comprehensive assessment or guidance for data retention and compliance.
Reviewing the data sanitation records is not the most important action, as it is a similar step to reviewing the media disposal records. Data sanitation records are documents that provide evidence and verification of the proper sanitation or cleansing of data on an IT system, such as deleting, encrypting, or masking data that is no longer needed or relevant. Reviewing the data sanitation records can help to ensure that the data on the IT system is protected from unauthorized access, disclosure, modification, or destruction, as well as comply with the privacy and confidentiality requirements. However, reviewing the data sanitation records does not provide a thorough assessment or guidance for data retention and compliance.
References := Best Practices in Designing a Data Decommissioning Policy, Introduction section. Server Decommissioning: a Brief Guide and Checklist, Notify all relevant parties about server decommissioning section. Deconstructing Decommissioning: Best Practices for Managing the Final Mile of Critical Assets, Here are seven best practices that when implemented can go a long way to ensure a successful decommissioning section. How to decommission a system: 3 keys to success - Enable Sysadmin, How to decommission a system: 3 keys to success section.