8.2 Command Descriptions

8.2.1Check Power Mode (E5h)

This command checks the power mode.

If the drive is in, going to, or recovering from the Standby Mode, the drive sets BSY, sets the Sector Count register to 00h, clears BSY, and generates an interrupt.

If the drive is in the Idle Mode, the drive sets BSY, sets the Sector Count register to FFh, clears BSY, and generates an interrupt.

8.2.2Download Micro Code (92h)

This command enables the host to alter the drive’s Micro-code. The data transferred using this command is vendor specific.

8.2.3Device Configuration Overlay (B1h)

The Device Configuration Overlay feature set allows a utility program to modify some of the optional commands, modes, and feature sets that a device reports as supported in the Identify Device command response as well as the capacity reported. Individual Device Configuration Overlay feature set commands are identified by the value placed in the Features register. The following table illustrates these features.

Table 8-2 Device Configuration Overlay Feature Register Values

Value

Command

C0h

Device Configuration Restore

C1h

Device Configuration Freeze Lock

C2h

Device Configuration Identify

C3h

Device Configuration Set

00h-BFh,C4h-FFh

Reserved

The Device Configuration Restore command disables any setting previously made by a Device.

The Device Configuration Freeze Lock command prevents accidental modification of the Device Configuration Overlay settings. After successful execution of a Device Configuration Freeze Lock Command, all Device Configuration Set, Device Configuration Freeze Lock, Device Configuration Identify command, and Device Configuration Restore commands shall be aborted by the device. The Device Configuration Freeze Lock condition will be cleared only after a power-down.

The Device Configuration Identify command returns a 512 byte data structure via PIO data-in transfer. The content of this data structure indicates the selectable commands, modes, and feature sets that the device is capable of supporting. Should a Device Configuration Set command be issued reducing the capabilities, the response to a Device Configuration Identify command will reflect the reduced set of capabilities accordingly.

Spinpoint M8-DVR Disti Product Manual REV 2.0

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Samsung M8-DVR manual Command Descriptions, Check Power Mode E5h, Download Micro Code 92h, Device Configuration Overlay B1h

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.

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