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| Brand | Samsung |
|---|---|
| Model | PM1633a |
| Capacity | 480GB |
| Usage Class | Enterprise |
| Host Interface | SAS 12Gb/s |
|---|---|
| Total Interface Bandwidth | 12 Gb/s |
| Form Factor | 2.5 |
|---|
| NAND Flash | Samsung V-NAND 3bit MLC (TLC) |
|---|---|
| Drive Writes Per Day | 1 |
| Total Bytes Written | 876 TBW |
| Sequential Read | 1200 MB/s |
|---|---|
| Sequential Write | 900 MB/s |
| Random Read IOPS | 190000 |
| Random Write IOPS | 37000 |
| Average Latency | 110 μs |
| Mean Time Between Failures | 2 Million Hours |
|---|---|
| Uncorrectable Bit Error Rate | 1.0×10⁻¹⁷ |
| Power Loss Protection | Yes |
| MPN | MZILS480HCGR |
|---|
Compared with the previous-generation MZILS480HCGR, the Samsung PM1633a (MZ-ILS480B) advances to a 12Gb/s SAS, V-NAND–based design that delivers up to 1,200/900 MB/s and 190K/37K IOPS, giving it a clear edge in throughput and transactional responsiveness for mainstream enterprise workloads. With 1 DWPD and 876 TBW in a 480GB footprint, it offers a stronger balance of endurance, performance density, and operational efficiency than its predecessor for virtualized servers, read-centric databases, and mixed-use storage arrays.
With an endurance rating of 876 TBW and 1 DWPD, the MZ-ILS480B can support writing its full 480 GB capacity once per day throughout its designed service life, which is more than sufficient for typical boot, OS, and general application workloads. In practical terms, under normal enterprise system-drive usage, this level of endurance provides long-term, worry-free operation and ample write headroom for many years of continuous deployment. For enterprise reliability, the MZ-ILS480B includes power loss protection (PLP), which helps preserve data in flight and prevents corruption if power is interrupted unexpectedly. Its UBER of 1.0E-17 indicates an extremely low uncorrectable bit error rate, supporting high data integrity, while the 2 million-hour MTBF further reinforces dependable 24/7 operation in business-critical environments.
1. The SAS interface provides enterprise-grade interoperability, high availability, and predictable throughput, making the drive a strong fit for mission-critical storage arrays and always-on server environments.
2. Its strong sequential read performance helps accelerate backup restores, analytics scans, and large dataset streaming, reducing wait time for data-intensive enterprise workloads.
3. The high random read capability enables fast response under heavily concurrent access, which is especially valuable for virtualization, OLTP databases, and metadata-heavy applications.
4. This endurance profile is well suited to read-centric enterprise deployments, allowing reliable day-after-day operation in boot, caching, and mainstream server storage use cases.
5. Built with Samsung V-NAND TLC and low typical latency, the drive balances capacity efficiency with stable flash performance, helping applications deliver quicker transaction response and more consistent QoS.
Lower capacity reference: 240GB Higher capacity reference: 960GB The 480GB MZ-ILS480B sits at the sweet spot of this enterprise SSD family. Compared with the 240GB model, it offers much better headroom for OS images, logs, application binaries, and growth over time, reducing early capacity pressure. Compared with the 960GB option, it delivers nearly the same enterprise-class read/write behavior and random IOPS profile while keeping acquisition cost and storage budget under tighter control. This makes 480GB a balanced choice for mid-scale deployments, such as boot and application storage for around 25 to 40 virtualized infrastructure nodes.
Q: Is MZ-ILS480B suitable for a write-heavy database server?
A: MZ-ILS480B is better suited for mixed-use or read-intensive workloads. With 1 DWPD and 876 TBW, it can handle steady writes, but extreme write-heavy database environments may require higher-endurance SSDs.
Q: How many full drive writes per day can it actually endure over its warranty period?
A: This model is rated at 1 DWPD, meaning it supports one full 480GB drive write per day throughout its warranty period. Its total endurance is specified at 876 TBW.
Q: Does it include power loss protection (PLP) and why is that critical?
A: Yes, MZ-ILS480B includes power loss protection. PLP helps preserve in-flight data and metadata during sudden outages, which is critical for preventing corruption and maintaining storage integrity in enterprise systems.
Q: What RAID level is recommended for this SSD?
A: RAID 10 is commonly recommended for this SSD in performance-sensitive server environments, as it balances speed, redundancy, and rebuild reliability. RAID 1 or RAID 5 may also fit specific capacity needs.