Seagate ST3250824SV ユーザーズマニュアル
SV35 Series SATA Product Manual, Rev. C
47
IDNF
1
1
This bit shall be set to 1 if a user-accessible address could not be found. IDNF shall be set to 1 if an
address outside of the range of user-accessible addresses is requested if command aborted is not
returned.
address outside of the range of user-accessible addresses is requested if command aborted is not
returned.
ABRT
1
1
This bit shall be set to 1 if this command is not supported. ABRT may be set to 1 if the device is not
able to complete the action requested by the command. ABRT shall be set to 1 if an address outside of
the range of user-accessible addresses is requested if IDNF is not set to 1.
able to complete the action requested by the command. ABRT shall be set to 1 if an address outside of
the range of user-accessible addresses is requested if IDNF is not set to 1.
CCTO
1
1
This bit shall be set to 1 if a Command Completion Time Out error has occurred.
SECTOR COUNT REGISTER FIELD DESCRIPTIONS
Current, Previous
These bits contain the number of contiguous sectors potentially written unsuccessfully, or with bad data, begin-
ning with the LBA of the first corrupted sector.
ning with the LBA of the first corrupted sector.
LBA (Low, Mid, High) (Current, Previous)
These bits contain the address of the first potentially corrupted sector.
DEVICE REGISTER FIELD DESCRIPTIONS
DEV
This bit shall indicate the selected device.
This bit shall indicate the selected device.
STATUS REGISTER FIELD DESCRIPTIONS
BSY
0
0
This bit shall be set to 0 indicating command completion.
DRDY
1
1
This bit shall be set to 1.
SE (Stream Error)
1
1
This bit shall be set to 1 if an error has occurred during the execution of the command when the WC bit
is set to 1 and the correct amount of data was transferred from the host. In this case, the LBA returned
in the Sector Number registers shall be the address of the first sector in error, and the Sector Count
registers shall contain the number of consecutive sectors that may contain errors.
is set to 1 and the correct amount of data was transferred from the host. In this case, the LBA returned
in the Sector Number registers shall be the address of the first sector in error, and the Sector Count
registers shall contain the number of consecutive sectors that may contain errors.
DRQ
0
0
This bit shall be set to 0.
ERR
1
1
This bit shall be set to 1 if an Error register bit is set to 1 and the WC bit is set to 0, or if the drive was
unable to transfer the correct amount of data to the host.
unable to transfer the correct amount of data to the host.
4.3.4.3.1
Time-constrained operations
In general, time constraints have impacts not only on data transfer between the drive and the host, but also on
the drive’s internal motion and movement of data to and from the internal buffer (cache). If the drive moves its
actuator to access some data other than what the host is (or shortly will be) accessing, there will be an
unavoidable delay before the actuator can be moved to where the host needs it to be to service a command.
the drive’s internal motion and movement of data to and from the internal buffer (cache). If the drive moves its
actuator to access some data other than what the host is (or shortly will be) accessing, there will be an
unavoidable delay before the actuator can be moved to where the host needs it to be to service a command.