How are SRs deleted and how can I recover an SR that was deleted by mistake?

When work is completed on a service a user marks it Resolved. SRs marked Resolved can still be accessed and edited. After a predefined number of days, a background process sets the SR status to Closed. Closed SRs can't be viewed or updated.

The Purge Deleted Service Requests job permanently deletes closed SRs. You set the number of days until a permanent delete using the SVC_SR_IN_DELETED_DAYS profile option. The job to delete the data permanently is Purge Deleted Service Requests. In addition to service requests it also purges all the associated child records.

Here's an example: say, you set the profile option SVC_SR_IN_DELETED_DAYS to 365 days. When a service request is marked Closed it can't be viewed. But the data isn't permanently deleted by the Purge Deleted Service Requests job for 365 days.