3.1Standard features

Barracuda ES.2 SAS drives have the following standard features:

Perpendicular recording technology

1.5 / 3 Gbit Serial Attached SCSI (SAS) interface

Integrated dual port SAS controller

Support for SAS expanders and fanout adapters

Downloadable firmware using the SAS interface

128 - deep task set (queue)

Supports up to 32 initiators

Jumperless configuration.

User-selectable logical block size (512, 520, 524, or 528 bytes per logical block)

Programmable logical block reallocation scheme

Flawed logical block reallocation at format time

Programmable auto write and read reallocation

Reallocation of defects on command (Post Format)

ECC maximum burst correction length of 400 bits

No preventive maintenance or adjustments required

Dedicated head landing zone

Embedded servo design

Automatic shipping lock

Self diagnostics performed when power is applied to the drive

Zone bit recording (ZBR)

Vertical, horizontal, or top down mounting

Dynamic spindle brake

16 Mbyte data buffer (see Section 4.5).

Drive Self Test (DST)

Background Media Scan (BGMS)

Power Save

3.2Media description

The media used on the drive has an aluminum substrate coated with a thin film magnetic material, overcoated with a proprietary protective layer for improved durability and environmental protection.

3.3Performance

Firmware-controlled multisegmented cache designed to dynamically adjust segments for enhanced system performance.

300 Mbytes/sec maximum instantaneous data transfers.

7,200 RPM spindle. Average latency = 4.16 msec

Command queuing of up to 128 commands

Background processing of queue

Supports start and stop commands (spindle stops spinning)

Adaptive seek velocity; improved seek performance

3.4Reliability

Annualized Failure Rate (AFR) of 0.73%

Mean Time Between Failures (MTBF) of 1,200,000 hours

Self-Monitoring Analysis and Reporting Technology (S.M.A.R.T.)

5-year warranty

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Barracuda ES.2 SAS Product Manual, Rev. E

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Seagate ST31000640SS, ST3750630SS, ST3500620SS manual Standard features, Media description, Performance, Reliability

ST31000640SS, ST3500620SS, ST3750630SS specifications

Seagate has been a leading name in the storage industry for decades, and its range of enterprise-class hard drives showcases advanced technologies and robust performance. The Seagate ST3750630SS, ST3500620SS, and ST31000640SS are three notable models that cater to the demands of data centers and enterprises. Each model is designed with specific features that enhance reliability and efficiency, making them suitable for various applications.

The Seagate ST3750630SS is a 750GB 15K RPM Serial Attached SCSI (SAS) drive. It boasts a high-performance architecture that allows for fast data transfer rates, making it ideal for high-load environments such as transaction processing and video streaming. This drive features an MTBF of 1.6 million hours, ensuring minimal downtime due to failures. It also employs advanced error recovery and data protection mechanisms, including error correction codes (ECC), to maintain data integrity.

Meanwhile, the ST3500620SS offers a capacity of 500GB with a spinning speed of 15K RPM as well. This drive utilizes the SAS interface, providing users with improved bandwidth and connectivity compared to traditional SATA drives. The ST3500620SS is designed with a focus on high availability, featuring a robust design that supports multiple workloads simultaneously. Its quick access times enhance overall system performance, making it a preferred choice for high-performance computing applications.

The ST31000640SS is another enterprise-class offering, delivering 1TB of storage capacity. Like its counterparts, this drive operates at 15K RPM and utilizes the SAS interface, facilitating fast data processing and retrieval. It also incorporates a dual-port design which allows for redundancy and failover capabilities. This feature is critical in enterprise environments where data access and uptime are paramount. The drive's design is optimized for durability and longevity, best suited for environments that require 24/7 operation.

All three Seagate drives feature advanced technologies such as dual-stage actuators and thermal write technology, ensuring improved read and write performance, along with reduced power consumption. Additionally, they are built to endure the rigors of enterprise workloads, including heavy I/O operations and high access demands.

In summary, the Seagate ST3750630SS, ST3500620SS, and ST31000640SS are exemplary models that reflect the company’s commitment to quality and performance in enterprise storage solutions. With their high speeds, reliability, and extensive features, these drives are well-equipped to meet the challenges of modern data-driven environments.