SSD or M2 (preferred) disk with RAID is strongly recommended for best performance and reliability. 30-50 GB for database storage and 100-500 GB for documents, attachments and SCM repositories. The size of the required storage strongly depends on the size of documents, attachments and SCM repositories managed by codeBeamer.
Active/concurrent Users refers to the number of users which are actively (concurrently) working in codeBeamer at a given time, e.g. creating, editing Work Items, adding Comments and/or other artefacts.
The number of registered users (accounts) may be a much higher number than the number if concurrent users, so this guidance should be used to refer to the total number of expected active (concurrent) users.