IBM ST33000650SS 3.5 Inch 3TB Hard Drive P/N 9SM260-039 / 90Y8731
IBM 3TB 3.5 7.2K SAS Hard Drive
IBM 3TB 7.2K RPM 3.5″ NL SAS HDD Technical Datasheet
Product Identification
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Brand / Vendor: IBM Corporation
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Original Equipment Manufacturer (OEM): Seagate Technology LLC
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Seagate Base Model: ST33000650SS
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Seagate Part Number (P/N): 9SM260-039
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IBM Part Number (P/N): 90Y8731
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IBM Feature Code (FC): 5433 / 5843 (Varies based on targeted machine type enclosure like DCS3700 or System x)
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Product Class: Constellation ES.2 (Enterprise Storage Generation 2 Nearline)
Core Architectural Specifications
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Form Factor: 3.5-inch Large Form Factor (LFF)
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Formatted Capacity: 3 TB (3,000 GB)
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Rotational Spindle Speed: 7,200 RPM
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Interface Port Type: Dual-Port Serial Attached SCSI (SAS) 6Gb/s
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On-Board Data Buffer: 64 MB
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Sector Architecture: Native 512 Bytes per Sector (512n)
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Deployment Configuration: Hot-Swappable (Typically shipped on an IBM System x or DCS3700 storage subsystem drive tray assembly)
Performance & Throughput Profiles
Optimized for high-density bulk nearline enterprise tiers, balancing massive volume capacity with mission-critical multi-drive RAID stability:
| Performance Metric | Rated Specification |
| Interface Port Transfer Speed | 6.0 Gbps (Backward compatible with 3.0 Gbps SAS host controllers) |
| Sustained Data Transfer Rate | Up to 155 MB/s |
| Average Latency Time | 4.16 ms |
| Average Seek Time (Read Typical) | 8.5 ms |
| Average Seek Time (Write Typical) | 9.5 ms |
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