Acoustics emissions, Electromagnetic immunity

2.10Acoustics emissions

Drive emission of sound is measured consistent with the ECMA-74 and its referenced standards. Testing is conducted at room temperature (approximately 25 degrees C). Emission levels are reported as the total A-weighted sound power levels for, steady state, idle and active (seek) modes of operations.

Table 3:	Drive A-weighted Sound Power Levels (SWL, BA)

		Idle[1]	Seek
1000 and 500 GB model		2.7 bels (typ)	2.8 bels (typ)
1000 and 500 GB model		2.9 bels (max)	3.0 bels (max)
		2.9 bels (max)	3.0 bels (max)
250 GB model		2.5 bels (typ)	2.6 bels (typ)
250 GB model		2.8 bels (max)	2.8 bels (max)
		2.8 bels (max)	2.8 bels (max)

[1]During periods of drive idle, some offline activity may occur according to the S.M.A.R.T. specification, which may increase acoustic and power to operational levels.

Test for Prominent Discrete Tones (PDTs)

Seagate follows the ECMA-74 standards for measurement and identification of PDTs. An exception to this pro- cess is the use of the absolute threshold of hearing. Seagate uses the lower limit for the threshold curve* to discern tone audibility and to compensate for the inaudible components of sound prior to computation of tone ratios according to Annex D of the ECMA-74 standards.

* Defined as the median curve given by ISO 389-7 (Tf curve) minus 10dB at all frequencies.

2.11Electromagnetic immunity

When properly installed in a representative host system, the drive operates without errors or degradation in performance when subjected to the radio frequency (RF) environments defined in the following table:

Table 4:	Radio frequency environments

Test		Description	Performance level	Reference standard

Electrostatic		Contact, HCP, VCP: ± 4 kV; Air: ± 8 kV	B	EN 61000-4-2: 95
discharge
Radiated RF		80 to 1,000 MHz, 3 V/m,	A	EN 61000-4-3: 96
immunity		80% AM with 1 kHz sine		ENV 50204: 95
		900 MHz, 3 V/m, 50% pulse modulation @ 200 Hz
Electrical fast		± 1 kV on AC mains, ± 0.5 kV on external I/O	B	EN 61000-4-4: 95
transient
Surge immunity		± 1 kV differential, ± 2 kV common, AC mains	B	EN 61000-4-5: 95

Conducted RF		150 kHz to 80 MHz, 3 Vrms, 80% AM with 1 kHz sine	A	EN 61000-4-6: 97
immunity
Voltage dips,		0% open, 5 seconds	C	EN 61000-4-11: 94
interrupts		0% short, 5 seconds	C
		40%, 0.10 seconds	C
		70%, 0.01 seconds	B

14	SV35.5 Series SATA Product Manual, Rev. A

ST3500410SV, ST3250311SV, ST31000525SV specifications

Seagate, a stalwart name in the data storage industry, offers a range of hard disk drives that cater to various needs and applications. Three notable models are the ST3250311SV, ST3500410SV, and ST31000525SV, each designed with unique characteristics and features suitable for diverse environments, from personal computing to enterprise storage solutions.

The ST3250311SV is a 250GB SATA drive that operates at 7200 RPM, providing a solid balance of performance and capacity. One of its main features is its 8MB cache, which enhances read and write speeds, making it suitable for high-demand applications like gaming and multimedia. The drive is also designed with Seagate's advanced data protection technologies, including an intelligent error recovery system that serves to minimize data loss and increase reliability during operation.

Next in line, the ST3500410SV offers a larger capacity of 500GB, making it an excellent choice for users who require more storage. Like its counterpart, it operates at 7200 RPM but is equipped with a 16MB cache for even better performance. The drive is built on Seagate's perpendicular recording technology, which increases storage density and improves data integrity. The ST3500410SV is particularly well-suited for server environments, where reliability and speed are critical. Its advanced power management features help reduce energy consumption, making it a more eco-friendly option for data centers.

Finally, the ST31000525SV provides an impressive 1TB of storage capacity, leveraging the same 7200 RPM speed and 32MB cache as its predecessors. This model exemplifies Seagate's focus on enhancing user experiences with greater storage and quicker access times, fulfilling the demands of both consumer and enterprise markets. With features like S.M.A.R.T. (Self-Monitoring, Analysis, and Reporting Technology), this drive helps users keep tabs on their drive's health and performance, anticipating potential failures and ensuring data security.

In summary, the Seagate ST3250311SV, ST3500410SV, and ST31000525SV drives showcase a range of capacities and features aimed at meeting the needs of today’s data-driven world. From gaming and personal use to demanding enterprise applications, these hard drives combine speed, reliability, and advanced technologies to deliver outstanding performance and data protection. Their robust design and efficient power management reinforce Seagate's commitment to innovation and sustainability in data storage solutions.

Seagate ST3500410SV Acoustics emissions, Electromagnetic immunity, Radio frequency environments

Models: ST3500410SV ST3250311SV ST31000525SV

2.10Acoustics emissions

Drive A-weighted Sound Power Levels (SWL, BA)

Idle[1]

Seek

Test for Prominent Discrete Tones (PDTs)

2.11Electromagnetic immunity

Radio frequency environments

Test

Description

Performance level

Reference standard

SV35.5 Series SATA Product Manual, Rev. A

ST3500410SV, ST3250311SV, ST31000525SV specifications