Hitachi HTS542525K9SA00 Specifications page 211

Feature Current
SE (Status, bit 5)
DWE (Status, bit 4)
SE (Stream Error) shall be set to one if an error has
occurred during the execution of the command and the RC
bit is set to one, 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. If the RC bit is set to one when the
command is issued and ICRC, UNC, IDNF, ABRT, or CCTO
error occurs, the SE bit shall be set to one, the ERR
bit shall be cleared to zero, and the bits that would
normally be set in the Error register shall be set in
the error log.
DWE (Deferred Write Error) shall be set to one if an
error was detected in a deferred write to the media for
a previous Write Stream DMA or Write Stream PIO command.
This error is from a previously issued command.
is set to one, the location of the deferred error is
only reported in the Write Stream error log.
Deskstar 7K160 Hard Disk Drive Specification
197
If DWE