3.2Configuring the drive

Each drive on the Serial ATA interface connects point-to-point with the Serial ATA host adapter. There is no master/slave relationship because each drive is considered a master in a point-to-point relationship. If two drives are attached on one Serial ATA host adapter, the host operating system views the two devices as if they were both “masters” on two separate ports. Both drives behave as if they are Device 0 (master) devices.

Serial ATA drives are designed for easy installation. It is usually not necessary to set any jumpers on the drive for proper operation; however, if you connect the drive and receive a “drive not detected” error, your SATA- equipped motherboard or host adapter may use a chipset that does not support SATA speed autonegotiation. If you have a motherboard or host adapter that does not support autonegotiation:

•Install a jumper as shown in Figure 3 below to limit the data transfer rate to 1.5 Gbits per second (and leave the drive connected to the SATA-equipped motherboard or host adapter that doesn’t support autonegotiation) or

•Install a SATA host adapter that supports autonegotiation, leave the drive jumper block set to “Normal operation” (see Figure 3 below), and connect the drive to that adapter. This option has the benefit of not limiting the drive to a 1.5 Gbits/sec transfer rate.

3.0 Gbits per second operation

Limit data transfer rate to 1.5 Gbits per second

Jumper block

SATA power connector

SATA interface connector

Figure 3. Serial ATA connectors

3.3Serial ATA cables and connectors

The Serial ATA interface cable consists of four conductors in two differential pairs, plus three ground connec- tions. The cable size may be 30 to 26 AWG with a maximum length of one meter (39.37 inches). See Table 6 for connector pin definitions. Either end of the SATA signal cable can be attached to the drive or host.

For direct backplane connection, the drive connectors are inserted directly into the host receptacle. The drive and the host receptacle incorporate features that enable the direct connection to be hot pluggable and blind mateable.

For installations which require cables, you can connect the drive as illustrated in Figure 4.

Signal connector

Power connector

Signal cable

Power cable

Figure 4. Attaching SATA cabling

Each cable is keyed to ensure correct orientation. Barracuda ES.2 Serial ATA drives support latching SATA connectors.

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Barracuda ES.2 Serial ATA Product Manual, Rev. A

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Seagate ST3750330NS, ST31000340NS, ST3250310NS, ST3500320NS manual Configuring the drive, Serial ATA cables and connectors
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ST3750330NS, ST31000340NS, ST3250310NS, ST3500320NS specifications

Seagate has long been a leader in the hard drive market, providing various storage solutions for personal and enterprise needs. Among its notable models are the ST3500320NS, ST3320630NS, ST3250310NS, and ST3750330NS, tailored for different applications, particularly in data center environments.

The Seagate ST3500320NS is a 500GB SATA hard drive designed for high-performance computing. One of its key features is a spindle speed of 7200 RPM, which offers quick data access times, significantly reducing latency in read and write operations. This model supports a 3Gb/s SATA interface, ensuring compatibility with a wide range of systems. Another important characteristic of the ST3500320NS is its robust error recovery mechanism, which enhances data integrity, making it suitable for applications where data precision is critical.

The ST3320630NS, on the other hand, is a 320GB variant, also featuring a 7200 RPM spindle speed. This model includes advanced power management features, allowing for reduced energy consumption without sacrificing performance. The drive's design focuses on reliability, designed to handle the demands of continuous operation in RAID configurations or as part of a network-attached storage (NAS) solution. Its dual stage actuator technology ensures more precise positioning of the read/write heads, improving overall performance and durability.

Considered an entry-level model, the ST3250310NS boasts a capacity of 250GB and shares the 7200 RPM speed common to other models. This drive is tailored for cost-effective solutions, providing a balance of price, performance, and reliability for small to medium business environments. Its resilience to shock and vibration makes it suitable for use in mobile workstations and external drives.

Lastly, the ST3750330NS features a significant 750GB capacity while maintaining the same 7200 RPM speed. It offers enhanced caching capabilities with a 32MB buffer, improving data throughput and responsiveness. Designed for high-capacity storage needs, this model is optimized for streaming applications and heavy workloads, reinforcing Seagate's commitment to delivering good performance in demanding scenarios.

All these models embody Seagate's dedication to innovation and reliability, featuring technologies such as Native Command Queuing (NCQ) and S.M.A.R.T. (Self-Monitoring, Analysis, and Reporting Technology) to monitor drive health. With years of expertise, Seagate continues to set industry standards for storage solutions, making these models ideal for a variety of professional applications.
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