HPE 1.92TB SAS RI SFF BC vs MV SSD - P40507-B21

HPE P40507-B21 1.92TB SAS 12G Read Intensive Small Form Factor Basic Carrier SSD

Overview

The HPE P40507-B21 is a 1.92TB SAS 12Gb/s Read Intensive solid-state drive in Small Form Factor Basic Carrier (SFF BC) packaging — purpose-built for server workloads where reads dominate and where every watt and every millimeter of bay space matters. At 1 Drive Write Per Day (DWPD) endurance and up to 97,000 random read IOPS sustained (155,000 peak), this drive is sized for workloads like database read replicas, surveillance video retrieval, analytics query caches, and content delivery tiers that see far more read activity than write. The P40507-B21 (often searched as P40507 B21) is a factory-new, genuine HPE option drive designed for direct integration into supported HPE ProLiant and Apollo platforms via the Basic Carrier form factor.

If your environment runs HPE HPE server storage and you need cost-effective, high-capacity flash for read-heavy workloads without paying for write-optimized endurance you won't consume, this is where to start your evaluation.

Key Features

• 1.92TB Usable Capacity via SAS 12Gb/s: SAS 12G delivers up to 12Gbps per lane — roughly double the bandwidth ceiling of SAS 6G — which means sequential read throughput won't be interface-bottlenecked on read-heavy workloads. For enterprise storage deployments pulling large files or streaming video data continuously, the interface headroom matters.
• 97,000 Sustained / 155,000 Peak Random Read IOPS: The 97K sustained figure is what your application actually sees under queue depth load — reliable, not cherry-picked burst. The 155K peak is available under lighter queue loads. Either way, this drive handles mixed OLTP read-replica or surveillance archive retrieval without the latency spikes you'd see on spinning disk.
• 36,000 Random Write IOPS (Sustained and Peak): Write performance is intentionally bounded — this is a Read Intensive class drive rated at 1 DWPD. For workloads writing 1.92TB or less per day, that's sufficient. If your workload writes significantly more, a Mixed Use or Write Intensive drive is the correct tier; forcing RI endurance on heavy-write workloads shortens drive life measurably.
• 1 DWPD Endurance Rating: One full drive write per day over the warranty period. This is the standard threshold for read-dominated workloads — video surveillance archives, log storage, read-replica databases, warm analytics stores. If your write ratio exceeds roughly 50% of daily I/O, reconsider the endurance tier.
• 6.37 Watts Typical Power Draw: Under 6.5W means this drive contributes minimally to rack power budgets and thermal load. In dense 24- or 25-bay SFF configurations, the difference between 6W and 10W drives compounds quickly across the backplane — the P40507-B21 is a power-efficient choice for high-density storage arrays.
• Hot-Plug Capable: The SFF BC carrier supports hot-plug insertion and removal on compatible HPE platforms. This means drive replacement or capacity expansion doesn't require a maintenance window or system downtime — operationally significant in 24/7 environments like surveillance recording infrastructure or always-on databases.
• 15mm Height, SFF Form Factor: Standard SFF (2.5-inch) mechanical envelope fits HPE ProLiant DL/ML/BL servers and Apollo platforms with SFF backplanes. The 15mm height confirms standard SFF depth — no compatibility surprises in tight bay configurations.
• 0.5 kg (1.1 lb) Drive Weight: Lightweight even in dense configurations. In a fully populated 25-bay chassis, total drive weight contribution stays manageable for rack weight budgets.

Integration & Compatibility

The P40507-B21 is an HPE Smart Carrier option drive. The Basic Carrier (BC) designation means it ships in the standard SFF tray format for HPE Gen10 and Gen10 Plus platforms with compatible SFF drive bays. Verify your server's storage controller supports SAS 12G drives and that the system firmware is current — HPE option drives are validated against HPE Smart Array and MegaRAID controllers shipping in supported ProLiant platforms. The SAS 12G interface is backward compatible with SAS 6G controllers, though at reduced throughput. For RAID configurations in surveillance or database deployments, pair with a compatible HPE Smart Array controller to take full advantage of the drive's IOPS headroom.

This drive is sourced factory-new as a genuine HPE option component — no grey-market, no parallel imports.

Frequently Asked Questions

Q: What is the endurance rating of the HPE P40507-B21 and what workloads is it suitable for?

A: The P40507-B21 is rated at 1 Drive Write Per Day (DWPD), making it appropriate for read-intensive workloads such as surveillance video retrieval, database read replicas, content caching, and analytics query stores. Workloads that write more than roughly one full drive capacity per day will exceed the endurance rating and should use a Mixed Use or Write Intensive drive instead.

Q: What interface does the P40507-B21 use and is it backward compatible?

A: The P40507-B21 uses a SAS 12Gb/s interface. It is backward compatible with SAS 6G controllers, though maximum throughput will be limited by the controller's 6Gbps ceiling in that configuration. For full performance, a SAS 12G-capable controller is recommended.

Q: Is the P40507-B21 hot-pluggable?

A: Yes. The SFF Basic Carrier design supports hot-plug on compatible HPE ProLiant and Apollo platforms, allowing drive insertion or removal without powering down the server — important for environments requiring continuous uptime.

Q: What is the power consumption of the P40507-B21?

A: The P40507-B21 draws 6.37 watts, which is low for a 1.92TB SAS SSD. This matters in high-density storage configurations where per-drive power consumption aggregates across many bays and affects rack-level power and cooling budgets.

Q: What is the warranty on the P40507-B21?

A: The P40507-B21 carries an HPE 3/0/0 warranty (3-year parts, no onsite, no call-to-repair commitment in base form). Extended care packs are available separately through HPE's support programs.

Q: What form factor servers does the P40507-B21 fit?

A: The P40507-B21 ships in the SFF (Small Form Factor) Basic Carrier format, which is compatible with HPE ProLiant DL, ML, and BL servers and Apollo platforms equipped with SFF drive bays. Always verify the specific server generation and backplane compatibility before ordering.

Karl Wilson

The P40507-B21's 97,000 sustained random read IOPS is the number I'd anchor the deployment decision on — not the 155K peak, which requires favorable queue depth conditions. For surveillance archive retrieval or database read-replica workloads where concurrent query load is real and sustained, 97K is what holds. That's the figure to compare against your workload's I/O profile before committing.

Technical Highlights:

• 1 DWPD Endurance: Correctly sized for workloads writing under 1.92TB/day. Exceeding this daily write budget consistently degrades cell life ahead of the warranty period — match the endurance tier to the write ratio before specifying.
• 6.37W Power Draw: In a 25-bay SFF chassis fully populated with P40507-B21 drives, aggregate drive power stays under 160W — a meaningful contrast to NVMe all-flash configs that can push 250W+ from drives alone in the same chassis count.
• SAS 12G Hot-Plug Carrier: The Basic Carrier format means no proprietary tray swap required on supported HPE platforms. Hot-plug capability eliminates maintenance windows for single-drive replacement — operationally valuable in always-on recording or query-serving environments.

Deployment Considerations:

• Confirm the target server's Smart Array controller firmware supports SAS 12G before installation. Running the P40507-B21 behind a SAS 6G controller cuts the interface bandwidth ceiling in half — the drive still works, but you leave throughput on the table.
• The 1 DWPD endurance rating is a hard boundary, not a guideline. If your monitoring shows average daily writes approaching or exceeding 1.92TB, the RI class is the wrong tier — move to a Mixed Use (3 DWPD) drive in the same family before the warranty conversation becomes complicated.

This drive is the right specification for HPE ProLiant deployments running large-scale surveillance video archives or read-replica database tiers where read throughput and capacity density matter more than write endurance — specifically where daily writes stay well under 1.92TB and 24/7 availability requires hot-plug serviceability.