When retention rules require data to stay fixed, WORM tape gives you a clear control point. IBM LTO Ultrium-9 WORM media provides 18 TB native capacity and up to 45 TB compressed capacity in a single cartridge, helping teams store large archive sets while preserving write-once, read-many behavior. This format is built for records that must remain immutable after recording. That makes it a strong fit for compliance archives, legal discovery sets, regulated industry retention, and backup copies that need protection from accidental or unauthorized overwrite. By keeping data offline and immutable, it adds a practical layer to broader data protection and governance strategies. Compared with standard rewritable tape, WORM media is chosen when policy matters as much as capacity. It helps reduce the risk of post-write modification while still delivering the density and portability that make tape attractive for long retention. For organizations managing audit trails, financial records, or regulated content, that distinction is worth paying for. IBM storage media is a dependable choice for teams that need archive control without giving up tape economics. Use it in libraries, vaults, and retention workflows where the integrity of stored data is non-negotiable.