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| Brand | Samsung |
|---|---|
| Model | PM1633A |
| Capacity | 480 GB |
| Usage Class | Read Intensive |
| Host Interface | SAS 12Gb/s |
|---|---|
| Total Interface Bandwidth | 12 Gb/s |
| Form Factor | 2.5 |
|---|
| NAND Flash | Samsung V-NAND 3D TLC |
|---|---|
| Drive Writes Per Day | 1 |
| Total Bytes Written | 876 TBW |
| Sequential Read | 1300 MB/s |
|---|---|
| Sequential Write | 750 MB/s |
| Random Read IOPS | 185000 |
| Random Write IOPS | 25000 |
| Average Latency | 100 μs |
| Mean Time Between Failures | 2 Million Hours |
|---|---|
| Uncorrectable Bit Error Rate | 1.0×10⁻¹⁷ |
| Power Loss Protection | Yes |
| MPN | MZILS480HCGR-00007 |
|---|
Compared with the previous-generation MZILS480HCGR-00007, the Samsung PM1633A (MZILS480HEGR-000H3) advances to Samsung V-NAND 3D TLC, delivering a more cost-efficient 480 GB enterprise SAS platform while sustaining up to 1,300/750 MB/s sequential performance and 185,000/25,000 IOPS random performance. With 1 DWPD and 876 TBW, it is a stronger choice for read-intensive virtualization, database acceleration, and boot/storage tiers than its predecessor, combining dual-port SAS 12Gb/s reliability with better flash economics in the same capacity class.
With an endurance rating of 876 TBW, this 480GB SSD can sustain a total of 876 terabytes of host writes, which is far beyond the demand of typical OS boot, office, and general server workloads. In practical terms, if it is used as a system or boot drive with ordinary daily write volume, its endurance headroom is sufficient for many years of stable service and can comfortably support long-term deployment from a write-life perspective. For enterprise reliability, built-in Power Loss Protection (PLP) helps preserve data in flight and protects mapping-table integrity during unexpected power failure, reducing the risk of corruption and unplanned recovery events. Its UBER rating of 1.0E-17 means the probability of an uncorrectable bit error is extremely low, supporting high data integrity for business-critical storage environments.
1. The SAS enterprise interface enables broad compatibility with mission-critical server and storage backplanes, making the drive easy to deploy in high-availability infrastructures without platform redesign.
2. Its strong sequential read performance accelerates backup restores, large database scans, and analytics jobs, helping reduce data access bottlenecks in read-heavy environments.
3. The high random read capability is well suited for virtualization, OLTP databases, and metadata-intensive workloads where fast response to many small requests directly improves application concurrency.
4. With enterprise write endurance backed by Samsung’s V-NAND 3D TLC architecture, the drive offers a practical balance of lifespan and cost efficiency for mixed-use datacenter deployments.
5. The low typical latency helps deliver more predictable QoS for transactional systems, reducing tail-response delays that can impact SLAs in latency-sensitive applications.
Lower-capacity reference: 240 GB Higher-capacity reference: 960 GB In this series, the 480 GB model sits at the sweet spot for mainstream enterprise deployment. Compared with the 240 GB version, it gives much more headroom for OS images, application growth, overprovisioning, and sustained write activity, reducing capacity pressure over time. Compared with the 960 GB option, it preserves essentially the same enterprise-class sequential and random I/O behavior while keeping acquisition cost and per-drive risk more controlled. This makes 480 GB especially suitable for small to mid-size virtualization pools, such as hosting 40 to 60 general-purpose business application VMs.
Q: Is MZILS480HEGR-000H3 suitable for a write-heavy database server?
A: It can support moderate database workloads, but for truly write-heavy servers, its 1 DWPD endurance may be limiting. It is better suited for mixed-use enterprise applications than sustained intensive writes.
Q: How many full drive writes per day can it actually endure over its warranty period?
A: This SSD is rated at 1 DWPD, meaning it can handle one full 480 GB drive write per day throughout its warranty period, aligned with its 876 TB total bytes written rating.
Q: Does it include power loss protection (PLP) and why is that critical?
A: Yes, it includes power loss protection. PLP is critical because it helps preserve in-flight data and metadata during sudden power failure, reducing corruption risk and improving enterprise data integrity.
Q: What RAID level is recommended for this SSD?
A: RAID 1, RAID 10, or RAID 5 can be considered depending on workload priorities. For database and enterprise use, RAID 10 is typically recommended for balanced performance, redundancy, and reliability.