Acoustics, Electromagnetic immunity | Seagate ST980815SB specs

2.11Acoustics

Drive acoustics are measured as overall A-weighted acoustic sound power levels (no pure tones). All mea- surements are consistent with ISO document 7779. Sound power measurements are taken under essentially free-field conditions over a reflecting plane. For all tests, the drive is oriented with the cover facing upward.

Note. For seek mode tests, the drive is placed in seek mode only. The number of seeks per second is defined by the following equation:

(Number of seeks per second = 0.4 / (average latency + average access time))

Table 4:	Drive level acoustics

Models			Idle*	Performance Seek

2 discs		ST9160821SB	2.4 bels (typ)	3.0 bels (typ)
		ST9120822SB	2.6 bels (max)	3.2 bels (max)
		ST9100828SB

1 disc		ST980815SB	2.2 bels (typ)	2.9 bels (typ)
		ST960815SB	2.4 bels (max)	3.1 bels (max)
		ST9402116SB

*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.

2.12Electromagnetic 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 5:	Radio frequency environments

Test		Description	Performance level	Reference standard

Electrostatic discharge		Contact, HCP, VCP: ± 4 kV; Air: ± 8 kV	B	EN 61000-4-2: 95

Radiated RF immunity		80 to 1,000 MHz, 3 V/m,	A	EN 61000-4-3: 96
		80% AM with 1 kHz sine		ENV 50204: 95
		900 MHz, 3 V/m, 50% pulse modulation @
		200 Hz

Electrical fast transient		± 1 kV on AC mains, ± 0.5 kV on external I/	B	EN 61000-4-4: 95
		O

Surge immunity		± 1 kV differential, ± 2 kV common, AC	B	EN 61000-4-5: 95
		mains

Conducted RF immunity		150 kHz to 80 MHz, 3 Vrms, 80% AM with	A	EN 61000-4-6: 97
		1 kHz sine

Power Frequency H-field		1 A/m, 50Hz/60Hz, 3 axes	A	EN 61000-4-8: 97
immunity

Voltage dips, interrupts		30% Reduction for 25 cycles	C	EN 61000-4-11: 94
		>95% Reduction for 250 cycles	C
		>95%, 0.5 cycles	B

A - 1) No upset or degradation in performance beyond manufacturer’s specified limits. 2) No data loss.

B - 1) Unit self recovers without user intervention. 2) No data loss.

C - 1) Upset OK provided that unit will function after user intervention.

12	Momentus 5400.3 SATA Blade Server Product Manual, Rev. E

ST9402116SB, ST980815SB, ST9160821SB, ST9100828SB, ST9120822SB specifications

The Seagate ST980815SB, ST9120822SB, ST9402116SB, ST9160821SB, and ST9100828SB are a lineup of popular hard disk drives that cater to various data storage needs, especially in enterprise and server environments. Each model features a combination of cutting-edge technology, performance capabilities, and robust reliability, making them ideal choices for businesses and IT infrastructures.

The ST980815SB, with a capacity of 80GB, was designed to meet the requirements of entry-level servers, workstations, and embedded applications. It operates at a spindle speed of 7200 RPM, ensuring quick access to stored data. This model employs the use of perpendicular magnetic recording technology, which enhances data density and reliability, allowing for increased storage capacity in a compact form factor.

The ST9120822SB offers a larger storage capacity of 120GB, targeting small to mid-sized enterprise applications. Like its smaller counterpart, it operates at 7200 RPM, delivering high transfer rates and low latency, which are critical for data-intensive operations. It includes features such as Native Command Queuing (NCQ) that optimizes the order of read and write commands, enhancing overall performance during multi-tasking operations.

Next in line, the ST9402116SB provides an impressive 400GB of storage, catering to applications that require a substantial amount of capacity. This model also uses a 7200 RPM spindle speed and incorporates SATA interface technology, providing fast data transfer rates while ensuring seamless integration into existing systems. Its robust design makes it suitable for continuous operation in always-on environments.

The ST9160821SB is another impressive offering, with a maximum capacity of 160GB that serves businesses demanding higher storage solutions without sacrificing performance. It maintains 7200 RPM speeds and is built with advanced thermal and vibration protection features, ensuring stable performance under varying environmental conditions.

Lastly, the ST9100828SB rounds out this lineup with its unique balance of performance and capacity, offering 80GB of storage. It also benefits from Seagate's legacy of reliability and comes equipped with a SATA interface, ensuring compatibility with modern systems.

Overall, these Seagate models represent a comprehensive suite of solutions that meet the diverse needs of businesses, successfully combining capacity, speed, and reliability for optimal data storage solutions. Each of these devices leverages Seagate's cutting-edge technologies to deliver high performance and uptime, making them a reliable choice for both small businesses and enterprise-level applications.

Seagate ST980815SB, ST960815SB manual Acoustics, Electromagnetic immunity, Drive level acoustics

Models: ST9402116SB ST980815SB ST9160821SB ST9100828SB ST9120822SB ST960815SB

2.11Acoustics

Drive level acoustics

Models

Idle*

Performance Seek

2.12Electromagnetic immunity

Radio frequency environments

Test

Description

Performance level

Reference standard

Momentus 5400.3 SATA Blade Server Product Manual, Rev. E

ST9402116SB, ST980815SB, ST9160821SB, ST9100828SB, ST9120822SB specifications