True or False: Once data has been written to disk, it is modifiable.

Data that has been written to disk in Splunk or any other data management system is typically immutable, which means it cannot be changed or modified after it has been stored. This immutability ensures data integrity and consistency, which are critical for reliable analysis and reporting.

When data is ingested into Splunk, it is indexed and stored in a way that maintains the original information without allowing alterations. This characteristic protects historical data from unintended changes that could distort analysis or lead to incorrect conclusions.

Thus, stating that data written to disk is modifiable is inaccurate. In Splunk, once the data has been stored, users and even superusers cannot directly modify the contents of that data in situ. Instead, if there is a need to change or correct data, the standard approach is to re-ingest the data either correctively or in a new format, which will then be treated as new data.

This understanding helps administrators manage data effectively while adhering to best practices for data governance and compliance.