7.0Physical/electrical specifications

This section provides information relating to the physical and electrical characteristics of the drive.

7.1PowerChoiceTM power management

Drives using the load/unload architecture provide programmable power management to tailor systems for performance and greater energy efficiency.

The table below lists the supported PowerChoice modes. The further you go down in the table, the more power savings you get. For example, Idle_B mode results in greater power savings than Idle_A mode. Standby_Z mode results in the greatest power savings.

PowerChoice modes

Mode

Description

 

 

Idle_A

Reduced electronics

 

 

Idle_B

Heads unloaded. Disks spinning at full RPM

 

 

Idle_C

Heads unloaded. Disks spinning at reduced RPM

 

 

Standby_Y

Heads unloaded. Disks spinning at reduced RPM.

 

Recovery requires the NOTIFY (Enable Spinup) command.

 

 

Standby_Z

Heads unloaded. Motor stopped (disks not spinning)

 

Recovery requires the NOTIFY (Enable Spinup) command.

 

 

PowerChoiceTM can be invoked using one of these two methods:

Power Condition mode page method—Enable and initialize the idle condition timers and/or the standby con- dition timers. The timer values are based on the values set in the Power Condition mode page.

START STOP UNIT command method—Use the START STOP UNIT command (OPERATION CODE 1Bh). This allows the host to directly transition the drive to any supported PowerChoice mode.

If both the Power Condition mode page and START STOP UNIT command methods are used, the START STOP UNIT command request takes precedence over the Power Condition mode page power control and may disable the idle condition and standby condition timers. The REQUEST SENSE command reports the current PowerChoice state if active and also the method by which the drive entered the PowerChoice state.

When the drive receives a command, all power condition timers are suspended if they were enabled via the Power Condition mode page. Once all outstanding commands are processed, the power condition timers are reinitialized to the values defined in the Power Condition mode page.

Constellation ES.2 SAS Product Manual, Rev. D

21

Page 29
Image 29
Seagate ST33000651SS, ST33000652SS Physical/electrical specifications, PowerChoiceTM power management, PowerChoice modes

ST33000652SS, ST33000650SS, ST33000651SS specifications

The Seagate ST33000651SS, ST33000650SS, and ST33000652SS are high-performance enterprise hard drives designed for demanding storage applications. These models are part of the Seagate Constellation ES series, known for their reliability and performance in server and data center environments.

One of the most notable features of these drives is their capacity. The ST33000651SS and ST33000650SS offer a storage capacity of 3TB, providing ample space for data-intensive applications. The ST33000652SS enhances this with a larger storage option, ensuring that organizations can meet growing data demands without needing frequent upgrades.

These drives utilize a SATA 6Gb/s interface, which allows for high-speed data transfer. This increased bandwidth is essential for applications that rely on rapid access, such as virtualization, cloud computing, and database management systems. Additionally, the drives support Native Command Queuing (NCQ), which enhances performance by optimizing the order in which read and write commands are executed.

Reliability is paramount in enterprise environments, and Seagate addresses this with several technologies designed to minimize downtime. The ST33000651SS and its counterparts feature a 7200 RPM spindle speed, which not only delivers fast access times but also contributes to the overall durability of the drives. They also come with advanced error correction and data integrity features, which safeguard against data loss.

Another important characteristic of these drives is their low power consumption. Operating at an average power usage of 6.0W, they help reduce operational costs, particularly in large-scale deployments. This energy efficiency is essential for organizations looking to maintain sustainability while maximizing performance.

In terms of physical design, these hard drives are built to endure tough conditions typically found in data centers. They come in a standard 3.5-inch form factor, ensuring compatibility with a wide range of servers and storage enclosures. The robust design further enhances their lifespan, making them a sound investment for enterprise storage solutions.

In summary, the Seagate ST33000651SS, ST33000650SS, and ST33000652SS hard drives offer a compelling combination of high capacity, fast data transfer rates, and reliability. Their advanced technologies and energy-efficient design make them ideal choices for enterprises that require dependable and high-performing storage solutions in their IT infrastructure.