4.0Performance characteristics

This section provides detailed information concerning performance-related characteristics and features of Sav- vio drives.

4.1Internal drive characteristics

 

ST9146802SS

ST973402SS

 

Drive capacity

146.8

73.4

Gbytes (formatted, rounded off value)

Read/write data heads

4

2

 

Bytes per track

489,984

489,984

Bytes (average, rounded off values)

Bytes per surface

36,704

36,704

Mbytes (unformatted, rounded off value)

Tracks per surface (total)

75,373

75,373

Tracks (user accessible)

Tracks per inch

150,000

150,000

TPI (average)

Peak bits per inch

925,000

925,000

BPI

Areal density

135

135

Gbit/in2

Internal data rate

660-1054

660-1054

Mbits/sec (variable with zone)

Disc rotation speed

10k

10k

rpm

Avg rotational latency

3.0

3.0

msec

4.2Seek performance characteristics

See Section 9.4.1, "SAS physical interface" on page 56 and the SAS Interface Manual (part number 100293071) for additional timing details.

4.2.1Access time

 

 

Including controller overhead1, 2

Not including controller overhead1,2

 

 

(msec)

 

(msec)

 

 

 

Read

Write

Read

Write

Average

Typical3,4

4.0

4.6

3.8

4.4

Single track

Typical3,4

0.4

0.6

0.2

0.4

Full stroke

Typical3,4

8.17

8.76

7.97

8.56

1.Execution time measured from receipt of the Command to the Response.

2.Assumes no errors and no sector has been relocated.

3.Typical access times are measured under nominal conditions of temperature, voltage, and horizontal orientation as measured on a representative sample of drives.

4.Access time = controller overhead + average seek time and applies to all data transfer commands. Access to data = access time + latency time.

Data sheet data except full stroke which was Gen 2.0 data.

Savvio 10K.2 SAS Product Manual, Rev. D

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Seagate ST9146802SS manual Performance characteristics, Internal drive characteristics, Seek performance characteristics

ST973402SS, ST9146802SS specifications

The Seagate ST973402SS and ST9146802SS are high-performance, enterprise-grade hard drives designed to meet the demanding needs of data-intensive applications. These drives are part of Seagate's Savvio and Barracuda product lines, aimed specifically at businesses and institutions requiring reliability, speed, and efficiency in storage solutions.

The ST973402SS is a 73GB, 2.5-inch hard drive, while the ST9146802SS offers a larger capacity of 146GB. Both models utilize a 10,000 RPM spindle speed, which significantly enhances their ability to handle fast data read and write operations. This speed ensures reduced latency and improved overall performance, making them ideal for environments where rapid access to data is crucial.

One of the standout features of these drives is their support for Serial Attached SCSI (SAS) interface. SAS technology provides a point-to-point connection, which allows for increased data transfer rates compared to traditional SATA drives. The ST973402SS and ST9146802SS are capable of transferring data at speeds of up to 600 MB/s, facilitating efficient data transfers in enterprise systems.

In terms of reliability, both models offer advanced features designed to improve data integrity and durability. They are built to withstand high workloads, with an annualized workload rate of up to 550 TB per year. This makes them well-suited for applications like databases and transactional storage, where sustained performance is required. Additionally, the drives feature Seagate’s PowerFit technology, which optimizes performance while minimizing power consumption.

To enhance data security, the drives come equipped with self-encrypting technology, ensuring that sensitive data is protected through hardware-based encryption. This is particularly important in environments where data breaches can lead to significant operational impacts.

The drives are also designed to operate efficiently in terms of thermal management, featuring robust heat dissipation capabilities. This helps to maintain optimal performance levels while prolonging the lifespan of the drives.

Overall, the Seagate ST973402SS and ST9146802SS are robust and reliable hard drives that cater to the needs of enterprise environments, combining high capacity, exceptional speed, advanced security features, and energy efficiency to help businesses maintain and manage large volumes of data effectively. With their proven performance and innovative technologies, these drives are well-equipped to support a wide range of applications in modern data centers.