Command name

Command code (in hex)

 

 

 

 

Security Erase Unit

F4H

 

Security Freeze

F5H

 

Security Set Password

F1H

 

Security Unlock

F2H

 

Seek

70H

 

Set Features

EFH

 

Set Max Address

F9H

 

Note: Individual Set Max Address

Address:

00H

commands are identified by the value

Password:

01H

placed in the Set Max Features regis-

Lock:

02H

ter as defined to the right.

Unlock:

03H

 

Freeze Lock:

04H

Set Max Address Extended

37H

 

Set Multiple Mode

C6H

 

Sleep

99H or E6H

 

S.M.A.R.T. Disable Operations

B0H / D9H

 

S.M.A.R.T. Enable/Disable Autosave

B0H / D2H

 

S.M.A.R.T. Enable Operations

B0H / D8H

 

S.M.A.R.T. Execute Offline

B0H / D4H

 

S.M.A.R.T. Read Attribute Thresholds

B0H / D1H

 

S.M.A.R.T. Read Data

B0H / D0H

 

S.M.A.R.T. Read Log Sector

B0H / D5H

 

S.M.A.R.T. Return Status

B0H / DAH

 

S.M.A.R.T. Save Attribute Values

B0H / D3H

 

S.M.A.R.T. Write Log Sector

B0H / D6H

 

Standby

96H or E2H

 

Standby Immediate

94H or E0H

 

Write Buffer

E8H

 

Write DMA

CAH

 

Write DMA Extended

35H

 

Write DMA FUA Extended

CDH

 

Write DMA Without Retries

CBH

 

Write Log Extended

3FH

 

Write Multiple

C5H

 

Write Multiple Extended

39H

 

Write Multiple FUA Extended

CEH

 

Write Sectors

30H

 

Write Sectors Without Retries

31H

 

Write Sectors Extended

34H

 

24

DB35.4 Series SATA Product Manual, Rev. C

Page 30
Image 30
Seagate DB35.4 manual F4H

DB35.4 specifications

The Seagate DB35.4 series of hard disk drives (HDDs) represents a significant advancement in data storage solutions for digital video recording and other demanding applications. Designed specifically for use in DVRs, NVRs, and related multimedia production environments, the DB35.4 drives are tailored to meet the rigorous requirements of streaming and recording high-definition video content.

One of the standout features of the DB35.4 series is its optimized design for continuous operation. These drives are built to handle workloads that involve constant read and write cycles, making them ideal for multi-channel recording setups. With a Mean Time Between Failures (MTBF) rating of 1.2 million hours, the drives ensure reliability and durability, essential for critical applications in broadcasting and surveillance.

The DB35.4 series supports advanced technologies, including native command queuing (NCQ), which enhances performance by allowing multiple read and write commands to be processed simultaneously. This results in improved data transfer rates and reduced latency, which are vital for applications requiring swift access to stored content. With capacities ranging from 250 GB to 2 TB, the drives provide ample space for storing extensive video libraries.

In terms of performance, the DB35.4 features a rotational speed of 7200 RPM, combined with a SATA interface that enables high-speed data transfers. The drives usually come equipped with 8 MB or higher cache memory, further boosting their efficiency during heavy data loads. This ensures that users experience smooth playback and recording, minimizing the risk of dropped frames or buffering.

Energy efficiency is another key characteristic of the Seagate DB35.4 series. Designed with power management in mind, these drives consume less energy during operation while still delivering optimal performance. This not only reduces operational costs but also contributes to a more environmentally friendly solution for users looking to maximize their storage capabilities without excessive power consumption.

In summary, the Seagate DB35.4 HDDs stand out for their reliability, performance, and efficiency. With their specialized design for multimedia applications, advanced technologies like NCQ, and a focus on energy savings, the DB35.4 series remains a preferred choice for businesses and individuals aiming to optimize their digital storage solutions in a demanding video-centric world.