Hitachi HUS154530VLF400 User Manual

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Hitachi Ultrastar 15K450 (FC-AL) Hard Disk Drive Specification
203  
19.13.2  Type
The Type field specifies the characteristics of the persistent reservation being established for all customer data sectors.  
Thetable below describes the supported types and how read and write commands are handled for each reservation type.
Table 170: PERSISTENT RESERVE OUT, Type Code
Code
Name
Description
0h
Reserved
Reserved
1h
Write Exclusive
Reads Shared: Any initiator may execute commands 
that transfer from the media. Writes Exclusive: Only 
the initiator with the reservation may execute com-
mands that transfer data to the media; Reservation 
Conflict status will be returned to other initiators. 
2h
Reserved
Reserved
3h
Exclusive Access
Reads Exclusive: Only the initiator with the reserva-
tion may execute commands that transfer data from the 
media; Reservation Conflict status will be returned to 
other initiators. 
Writes Exclusive: Only the initator with the reserva-
tion may execute commands that transfer data to the 
media; Reservation Conflict status will be returned to 
other initators. 
4h
Reserved
Reserved
5h
Write Exclusive 
Registrants Only
Reads Shard: Any initiator may execute commands 
that transfer from media.
Writes Exclusive: Only registered initiators may exe-
cute commands that transfer data to the media; Reser-
vation Conflict status will be returned to other 
initiators.  
6h
Exclusive Access 
Registrants Only
Reads Exclusive:  Only registered initiators may exe-
cute commands that transfer data from the media; Res-
ervation Conflict status will be returned to other 
initiators. 
Writes Exclusive:  Only registered initiators may exe-
cute commands that transfer data to the media; Reser-
vation Conflict status will be returned to other 
initiators.
7h-Fh
Reserved
Reserved