•ABRT (Aborted Command) indicates the requested command has been aborted due to a drive status error (Not Ready, Write Fault, etc.) or because the command code is invalid.

•# Indicates the content of this bit is command dependent.

NOTE: Unused bits are cleared to zero.

6.3.4.5Sector Count Register and Sector Count Extended Register (Ex. 1F2h)

This register contains the number of sectors of data requested to be transferred on a read or write operation between the host and the drive. In 28-bit addressing, if the value in this register is zero, a count of 256 sectors is specified. In 48-bit addressing, the Sector Count Register is the low order byte of the 16-bit sector count value and the Sector Count Extended Register is the high order byte of the 16-bit sector count value.

If this register is zero at command completion, the command was successful. If not successfully completed, the register contains the number of sectors, which need to be transferred in order to complete the request.

The contents of this register may be defined otherwise on some commands (e.g., Initialize Drive Parameters command, Format Track command).

6.3.4.6Cylinder High Register and Cylinder High Extended Register (Ex. 1F5h)

In CHS mode the Cylinder High Register contains the high order bits of the starting cylinder address for any disk access. In LBA mode the Cylinder High Register contains bits 16-23 of the LBA. The Cylinder High Extended Register contains bits 40-47 of the 48-bit LBA.

At the end of the command, this register is updated to reflect the current disk address. The most significant bits of the cylinder address are loaded into the Cylinder High register.

6.3.4.7Cylinder Low Register and Cylinder Low Extended Register (Ex. 1F4h)

In CHS mode the Cylinder Low Register contains the low order 8 bits of the starting cylinder address for any disk access. In LBA mode the Cylinder Low Register contains bits 8-15 of the LBA. The Cylinder Low Extended Register contains bits 32-39 of the 48-bit LBA. At the end of the command, this register is updated to reflect the current disk address.

6.3.4.8Command Register (Ex. 1F7h)

This register contains the command code being sent to the drive. Command execution begins immediately after this register is written. The executable commands, the command codes, and the necessary parameters for each command are listed.

6.3.4.9Device Register (Ex. 1F6h)

This register contains the drive and head numbers. When executing an Initialize Drive Parameters command, the content of this register defines the number of heads minus 1.

7

6

5

4

3

2

1

0

Obsolete

LBA

Obsolete

DEV

#

#

#

#

 

 

 

 

 

 

 

 

Spinpoint M8-DVR Disti Product Manual REV 2.0

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Samsung M8-DVR manual Command Register Ex F7h, Device Register Ex F6h
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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.
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