IBM 7.68TB SAS 12G RI 2.5" SSD Samsung PM1633a Series
MZ-ILS7T60 / 01LJ421 / 01EJ997
The IBM 7.68TB SAS 12Gb/s Solid State Drive, based on the Samsung PM1633a enterprise platform, is a Read-Intensive (RI) SSD designed for server and data center workloads requiring high capacity, reliability, and consistent performance. Using a SAS 3.0 dual-port interface and Samsung 3D V-NAND TLC, this drive is optimized for environments where read operations dominate.
Part Number Identification
The following part numbers all reference the same Samsung PM1633a 7.68TB SAS SSD, with differences related to IBM OEM labeling or lifecycle classification:
-
01LJ421 – IBM OEM Part Number
-
01LJ504 – IBM Alternate / Replacement Part
-
01EJ997 – IBM Spare Part Number
-
MZ-ILS7T60 – Samsung Model Number
-
MZILS7T6HMLS-000M3 / MZILS7T6HMLS – Samsung Manufacturing Part Numbers
Device Type & Classification
-
Device Type: Solid State Drive (SSD)
-
Workload Class: Read-Intensive (RI)
-
Enterprise Use: Server and data center storage
Technical Specifications
| Attribute |
Specification |
| Capacity |
7.68 TB |
| Interface |
SAS 3.0 (12 Gb/s), dual-port |
| Form Factor |
2.5-inch SFF, 15 mm |
| NAND Flash Type |
Samsung 3D V-NAND TLC |
| Endurance |
1 DWPD (5-year rating) |
| MTBF |
2,000,000 hours |
| Sequential Read |
Up to 1,250 MB/s |
| Sequential Write |
Up to 1,250 MB/s |
| Random Read (4KB) |
Up to 200,000 IOPS |
| Random Write (4KB) |
Up to 35,000 IOPS |
Power & Physical Characteristics
Reliability & Security Features
-
Enterprise Power-Loss Protection (PLP)
-
TCG Enterprise encryption support
-
Dual-port SAS for high availability
Performance Notes
Performance figures may vary by IBM firmware and system configuration. Some PM1633a variants list higher peak throughput, but typical enterprise-validated performance aligns with the ~1,250 MB/s sequential speeds shown above, consistent with Samsung PM1633a reference specifications.
Compatibility
