Execute Device Diagnostics 90h, Format Track 50h

8.2.4Execute Device Diagnostics (90h)

This command performs the internal diagnostic tests implemented by the drive. The Diagnostic Code written to the Error register is a unique 8-bit code.

	Table 8-4 Diagnostic Codes

Code	Description
01h	No error detected
02h	Formatter device error
03h	Sector buffer error
04h	ECC circuitry error
05h	Controlling microprocessor error

8.2.5Flush Cache (E7h, EAh: extended)

This command is used by the host to request the drive to flush the write cache. If write is to be flushed, all data cached will be written to the media. The BSY bit will remain set to one until all data has been successfully written or error occurs.

8.2.6Format Track (50h)

This command is obsolete in the ATA7 specification. The supporting of this command is for backward compatibility purpose.

8.2.7Identify Device (ECh)

The Identify Device command enables the host to receive parameter information from the device. When the command is issued, prepares to transfer the 256 words of device identification data to the host, sets the DRQ bit, clears the BSY bit, and generates an interrupt. The host can then transfer the data by reading the Data register. The parameter words in the buffer have the arrangement and meanings defined. All reserved bits or words will remain to be zero.

Some parameters are defined as a group of bits. A word which is defined as a set of bits is transmitted with the indicated bits on the respective data bus bit (e.g., bit 15 appears on DD15).

Other parameters are defined as a sixteen-bit value. A word which is defined as a sixteen bit value places the most significant bit of the value on bit DD15 and the least significant bit on bit DD0.

Some parameters can be defined as a 32-bit value (e.g., words 57 and 58). Such fields are transferred using two word transfers. The device first transfers the least significant bits, bits 15 through 0 of the value, on bits DD15 through DD0 respectively. After the least significant bits have been transferred, the most significant bits, bits 31 through 16 of the value, are transferred on DD15 through DD0 respectively.

Spinpoint M8-DVR Disti Product Manual REV 2.0

M8-DVR specifications

The Samsung M8-DVR is an advanced digital video recorder designed to meet the ever-evolving demands of modern surveillance and recording needs. This cutting-edge device combines state-of-the-art technology with user-friendly features, making it a reliable choice for both residential and commercial applications.

At the core of the M8-DVR’s design is its high-definition recording capability. The device supports various resolutions, including Full HD 1080p, ensuring that all captured footage is crystal clear. This clarity is crucial for identifying details, whether for security purposes or monitoring activities around the clock. It can accommodate multiple camera inputs, allowing users to expand their surveillance network seamlessly.

One of the standout features of the M8-DVR is its remarkable storage capacity. Equipped with advanced hard disk technology, it can store several terabytes of footage, which can be further expanded using additional drives. This means that even with continuous recording, users won’t have to worry about running out of storage quickly. The device also incorporates efficient compression technologies, such as H.265, which allows for reduced file sizes without sacrificing video quality.

In terms of connectivity, the M8-DVR offers various options, including Ethernet ports for network connectivity, USB ports for data transfer, and HDMI output for direct connection to monitors. This versatility allows users to easily stream live footage or review recordings on larger screens. The device supports remote viewing through mobile applications, allowing users to monitor their property from virtually anywhere in real-time.

User experience is further enhanced by an intuitive interface that makes navigation simple and efficient. It includes features like motion detection and alerts, which notify users of any unusual activities. The advanced search function is another highlight, enabling users to quickly locate specific events in their recordings without long hours of scrolling.

The Samsung M8-DVR is also designed with durability in mind. It comes with robust security features to protect against unauthorized access and offers backup options to prevent data loss. With its blend of technology, storage capabilities, and user-friendly design, the Samsung M8-DVR stands out as a comprehensive solution for modern video surveillance needs, making it an essential tool for enhancing security and peace of mind in any environment.

Samsung M8-DVR Execute Device Diagnostics 90h, Flush Cache E7h, EAh extended, Format Track 50h

Models: M8-DVR