Read Continuous Bit; Write Continuous Bit; Handle Streaming Error Bit; Streaming Logs - Hitachi HDT725025VLA380 - Deskstar 0A33423 T7K500 250GB SATA 7200RPM 8MB Cache Hard Drive Specifications

10.17.5 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.

10.17.6 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.

10.17.7 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.

10.17.8 Streaming Logs

The Streaming Data Transfer feature set requires two error logs and one performance log. These logs are accessed
via the Read Log Ext command; the information included in the error logs is volatile and is not maintained across
power cycles, hard resets, or sleep. These error logs are 512 bytes in length and retain the last 31 errors that occurred
during any Streaming Data transfer.

10.18 SCT Command Transport Feature Set

SMART Command Transport (SCT) is the method for the drive to receive commands using log page E0h and
transporting data using log page E1h. These log pages are used as follows:
Write log page
Read log page
There are two ways to access the log pages: using SMART READ/WRITE LOG and READ/WRITE LOG EXT.
Both sets of commands access the same log pages and provide the same capabilities.
The log directory for log pages E0h and E1h should report a length of one. The length of log page E1h does not
indicate the length of an SCT data transfer.
If SMART is supported, but not enabled, the drive supports SMART READ/WRITE LOG for Log page E0h and
E1h.
If security is enabled and password has not been issued to unlock the device, all SCT commands will fail.
Log page E0h Log page E1h
Issue Command Send Data to the drive
Return Status Received Data from the drive
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