User Manual

SCSI Commands Reference Manual, Rev. J 290
www.seagate.com Zone Block Commands (ZBC)
ZONE TYPE field
The ZONE TYPE field indicates the Zone Type (see ZBC) of zone as described in table 251.
The ZONE CONDITION field indicates the Zone Condition (see ZBC) of the zone as described in table 252.
NON_SEQ bit
The value of the non-sequential (NON_SEQ) bit is based on the Non-Sequential Write Resources Active zone attribute (see ZBC).
If Non-Sequential Write Resources Active is:
a) false, then the NON_SEQ bit shall be set to zero; or
b) true, then the NON_SEQ bit shall be set to one.
RESET bit
The value of the RESET bit is based on the RWP Recommended zone attribute (see ZBC). If RWP Recommended is:
a) false, then the RESET bit shall be set to zero; or
b) true, then the RESET bit shall be set to one.
ZONE LENGTH field
The ZONE LENGTH field indicates the number of logical blocks in this zone.
ZONE START LBA field
The ZONE START LBA field indicates the lowest LBA in this zone.
WRITE POINTER LBA field
The WRITE POINTER LBA field indicates the starting LBA that the application client should specify in the next write command associated with
this zone (i.e., the write pointer). The content of the WRITE POINTER LBA field is invalid if the content of the ZONE CONDITION field
(see table
252) indicates that the WRITE POINTER LBA field is invalid.
Table 251 Zone descriptor ZONE TYPE field
Code Description
0h Reserved
1h CONVENTIONAL
2h SEQUENTIAL WRITE REQUIRED
3h SEQUENTIAL WRITE PREFERRED
4h to Fh Reserved
Table 252 Zone descriptor ZONE CONDITION field
Code Description The content of the WRITE POINTER LBA field is invalid
0h NOT WRITE POINTER yes
1h EMPTY no
2h IMPLICITLY OPENED no
3h EXPLICITLY OPENED no
4h CLOSED no
5h to Ch Reserved
Dh READ ONLY yes
Eh FULL yes
Fh OFFLINE yes