Introduction

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In addition, Serial ATA makes the transition from parallel ATA easy by providing legacy software support. Serial ATA was designed to allow you to install a Serial ATA host adapter and Serial ATA disk drive in your current system and expect all of your existing applications to work as normal.

The Serial ATA interface connects each disk drive in a point-to-point configuration with the Serial ATA host adapter. There is no master/slave relationship with Serial ATA devices like there is with parallel ATA. If two drives are attached on one Serial ATA host adapter, the host operating system views the two devices as if they were both “masters” on two separate ports. This essentially means both drives behave as if they are Device 0 (master) devices.

The host adapter may, optionally, emulate a master/slave environment to host software where two

devices on separate Serial ATA ports are represented to host software as a Device 0 (master) and Device

Note 1 (slave) accessed at the same set of host bus addresses. A host adapter that emulates a master/slave environment manages two sets of shadow registers. This is not a typical Serial ATA environment.

The Serial ATA host adapter and drive share the function of emulating parallel ATA device behavior to provide backward compatibility with existing host systems and software. The Command and Control Block registers, PIO and DMA data transfers, resets, and interrupts are all emulated.The Serial ATA host adapter contains a set of registers that shadow the contents of the traditional device registers, referred to as the Shadow Register Block. All Serial ATA devices behave like Device 0 devices. For additional information about how Serial ATA emulates parallel ATA, refer to the “Serial ATA International Organization: Serial ATA Revision 3.0”. The specification can be downloaded from www.sata-io.org.

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Pipeline HD SATA Product Manual, Rev. B

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Seagate ST2000VM002, ST1500VM002 manual Introduction
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ST2000VM002, ST1500VM002 specifications

The Seagate ST1500VM002 and ST2000VM002 are part of the Seagate Video 3.5 Series, designed specifically for surveillance systems and DVRs. These hard drives provide robust storage solutions tailored to handle the high demands of continuous video recording and playback.

Both models boast a 3.5-inch form factor and utilize SATA III interfaces, ensuring fast data transfer rates essential for processing large video files from multiple security cameras. The ST1500VM002 offers a storage capacity of 1.5TB, while the ST2000VM002 provides an enhanced capacity of 2TB, making them suitable for extensive surveillance setups that may require longer retention of video content.

One of the most significant features of these drives is their support for 24/7 operation, allowing them to perform reliably and efficiently under constant load. This aspect is particularly important for security applications where data is consistently being recorded and accessed without downtime. Moreover, both models are optimized for high workload rates, capable of handling workloads of up to 180TB per year, which is essential for the rigorous demands of surveillance use.

The Seagate ST1500VM002 and ST2000VM002 also feature advanced technologies that help enhance performance and reliability. These drives incorporate AgileArray technology, which optimizes drive performance in multi-drive systems and improves RAID performance. This technology also features error recovery controls, which are critical for maintaining data integrity over time.

In terms of reliability, both drives are built with robust components designed to withstand the harsh conditions typically associated with surveillance environments. They come equipped with high shock resistance, ensuring they remain functional in various conditions, preserving valuable data even in the event of physical impacts or vibrations.

Furthermore, they include features like Seagate Rescue Data Recovery Services, providing customers peace of mind knowing that their data can be recovered in unexpected scenarios. Overall, the Seagate ST1500VM002 and ST2000VM002 are excellent choices for anyone in need of high-capacity, reliable storage solutions for their surveillance needs, offering a blend of advanced technology, robust performance, and dependable data integrity.
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