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Cheetah 10K.6 FC Product Manual, Rev. B

3.Where power is provided to multiple drives from a common supply, careful consideration for individual drive power requirements should be noted. Where multiple units are powered on simultaneously, the peak start- ing current must be available to each device.

4.Parameters, other than spindle start, are measured after a 10-minute warm up.

5.No terminator power.

6.2.1Conducted noise immunity

Noise is specified as a periodic and random distribution of frequencies covering a band from DC to 10 MHz. Maximum allowed noise values given below are peak-to-peak measurements and apply at the drive power connector.

 

+5V

+12V

0 to 100 kHz

150mV

150mV

100 kHz to 10 MHz

100mV

100mV

6.2.2Power sequencing

The drive does not require power sequencing. The drive protects against inadvertent writing during power-up and down.

6.2.3Current profiles

Figures 3, 4 and 5 identify the drive +12V current profiles for each model ST3146807FC, ST3733307FC and ST336607FC, respectively. The current during the various times is as shown:

T0 Power is applied to the drive.

T1 Controller self-tests are performed.

T2 Spindle begins to accelerate under current limiting after performing internal diagnostics. T3 Spindle is up to speed and the Head-Arm restraint is unlocked.

Note: All times and currents are typical. See Table 1 for maximum current requirements.

Figure 3. Typical ST3146807FC drive +12V current profile

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Seagate ST3146807FC, ST336607FC, ST373307FC manual Conducted noise immunity, Power sequencing, Current profiles, +5V +12V
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ST336607FC, ST373307FC, ST3146807FC specifications

The Seagate ST373307FC, ST3146807FC, and ST336607FC are robust hard disk drives designed for enterprise environments where reliability and performance are critical. Each model offers distinct features suited to various data storage needs, reflecting Seagate's commitment to innovation in storage technology.

The ST373307FC is a 73GB Fibre Channel hard drive that operates at 15,000 RPM, making it exceptionally fast for read and write operations. This drive employs a 4GB cache, enhancing its performance by allowing quicker access to frequently used data. With a 3.5-inch form factor, the ST373307FC is built for high-density environments, delivering reliable access to data. Its Fibre Channel interface supports high-speed connections, essential for data-intensive applications like databases and virtualization.

Next in line, the ST3146807FC offers a capacity of 146GB, also operating at 15,000 RPM. This drive features an 8GB cache, which significantly improves its data transfer rates, making it ideal for transactional workloads. The ST3146807FC is engineered to minimize latency and maximize throughput, ensuring that enterprises can access critical data swiftly and efficiently. Additionally, its rugged construction is designed to withstand the demands of continuous operation, providing peace of mind for businesses with strict uptime requirements.

Lastly, the ST336607FC has a substantial storage capacity of 300GB and shares the 15,000 RPM operational speed that characterizes this high-performance line. With a similar 8GB cache as the ST3146807FC, it offers excellent performance for read-intensive and write-heavy applications. The ST336607FC is also designed with enhanced thermal management features, supporting cooler operations in densely packed server environments. This model is particularly suited for applications such as data warehousing and online transaction processing, where speed and reliability are paramount.

Each of these drives utilizes advanced technologies like Native Command Queuing (NCQ), which optimizes the order of read and write requests. These features, combined with Seagate's reputation for durability and performance, make the ST373307FC, ST3146807FC, and ST336607FC excellent choices for enterprise applications requiring high-speed data access and exceptional reliability. In environments where data integrity and uptime are critical, these drives provide the robust performance necessary to meet demanding storage needs.
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