Seagate
Seagate ST1200MM0139 1.2 TB 2.5" SAS 12Gb/s 10000 RPM 256 MB internal hard drive
2.5-inch 1.2 TB SAS 12Gb/s internal hard drive spins at 10000 RPM with 256 MB buffer for enterprise workloads
- PackagingBare Drive
- InterfaceSAS 12Gb/s
- Capacity1.2TB
- NAND Flash Memory TypeSLC
- RPM10000 RPM
- Average Latency12Gb/s
- 2 TB capacity for data-intensive workloads
- 10000 RPM spindle speed for rapid data access
- SAS 12Gb/s interface for high-throughput connectivity
- 256 MB buffer to smooth burst workloads
- 5 inch form factor fits dense server bays
Enterprise 10K SAS Drive
The Seagate ST1200MM0139 is a 1.2 TB enterprise hard drive built for 2.5 inch drive bays. It spins at 10000 RPM and connects through a SAS 12Gb/s interface with a 256 MB buffer. This combination targets workloads that demand consistent throughput and low latency.
Suited for Transaction-Heavy Arrays
This drive suits database servers, virtualisation hosts and high-performance storage arrays that can exploit 10000 RPM spindle speed and SAS connectivity. Buyers who need capacities beyond 1.2 TB or who require a different physical form factor should evaluate alternative models.
Deciding Specification: SAS 12Gb/s Interface
The SAS 12Gb/s interface is the single specification that determines compatibility; the system backplane or controller must support this exact standard. Without a matching SAS 12Gb/s host connection the drive cannot operate at its rated performance.
Highlights
- 2 TB capacity for data-intensive workloads
- 10000 RPM spindle speed for rapid data access
- SAS 12Gb/s interface for high-throughput connectivity
- 256 MB buffer to smooth burst workloads
- 5 inch form factor fits dense server bays
Specifications
| Brand | Seagate |
|---|---|
| Model | ST1200MM0139 |
| Packaging | Bare Drive |
| Interface | SAS 12Gb/s |
| Capacity | 1.2TB |
| NAND Flash Memory Type | SLC |
| RPM | 10000 RPM |
| Average Latency | 12Gb/s |
| Shipping weight | 0.91 kg |
| Package size | 305 × 229 × 102 mm |
Questions about this item
Does the 2.5-inch form factor and 0.6-inch height fit a standard 2.5-inch drive bay?
The drive measures 2.5 inches wide, 4 inches deep and 0.6 inches high, matching the standard 2.5-inch internal bay dimensions.
How is the SAS 12Gb/s interface connected, and what is the common mistake?
Connect the SAS data and power cable to the drive's SAS port; the frequent error is not fully seating the connector until it clicks.
When will the 256 MB buffer or 10000 RPM mechanism need replacement?
Enterprise drives of this class are rated for continuous operation; replace the unit if SMART attributes report reallocated sectors or excessive seek errors.
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