IBM® 2 TB, 4 TB, and 6 TB 7,200 rpm 6 Gbps and 12 Gbps 3.5-inch hot-swap NL SAS hard disk drives (HDDs) and self-encrypting drives (SEDs) can provide the performance required for extensive storage capacity while providing the flexibility of hot-swap. These new drives are 512 emulation (512e), a type of Advanced Format drive, which is a new technology for increasing drive capacities while maintaining data integrity. All NL SAS drives are RoHS compliant.