Western Digital Ultrastar DC HC310 Specifications page 74

Allocation Unit, streaming performance may be degraded. The Set Features command to enable/disable caching
shall not affect caching for streaming commands.
9.13.1.3 Not Sequential Bit
The Not Sequential bit specifies that the next read stream command with the same Stream ID may not be sequential
in LBA space. This information helps the device with pre-fetching decisions.
9.13.1.4 Read Continuous Bit
If the Read Continuous bit is set to one for the command, the device shall transfer the requested amount of data to
the host within the Command Completion Time Limit even if an error occurs. The data sent to the host by the
device in an error condition is vendor specific.
9.13.1.5 Write Continuous Bit
If the Write Continuous bit is set to one for the command, and an error is encountered, the device shall complete the
request without posting an error. If an error cannot be resolved within the Command Completion Time Limit, the
erroneous section on the media may be unchanged or may contain undefined data. A future read of this area may
not report an error, even though the data is erroneous.
9.13.1.6 Handle Streaming Error Bit
The Handle Streaming Error bit specifies to the device that this command starts at the LBA of a recently reported
error section, so the device may attempt to continue its corresponding error recovery sequence where it left off
earlier. This mechanism allows the host to schedule error recovery and defect management for content critical
data.
Western Digital Hard Disk Drive OEM Specification
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