Справочник Пользователя для Q-Logic 8200 SERIES

1–Legacy vs. Open-iSCSI
Summary of Major Differences

1-2

IS0054604-00  A

 summarizes the major differences between the legacy IOCTL-based 

and Open-iSCSI models.

1

Firmware 
Operational 
Mode

Firmware is configured in 
AUTO CONNECT 
MODE. In this mode:


The firmware reads 
the DDB entries from 
the predefined area in 
the Flash.



For a Send Target the 
firmware initiates dis-
covery, discovers the 
target, and initiates 
login to the discov-
ered target.



The firmware posts an 
AEN to the driver, 
identifying each dis-
covered target.



For the DDBs that rep-
resent a Normal tar-
get, the firmware logs 
into them and posts an 
AEN to the driver to 
report the login status.

Firmware is configured in NON 
AUTO CONNECT MODE. In 
this mode:


The driver reads the DDB 
entries from the predefined 
area in the Flash.



For a Send Target the 
driver initiates a discovery 
session through the mail-
box command, queries the 

firmware for discovered tar-
gets, and then initiates 
login to the targets using 
the mailbox command.



The firmware posts an AEN 
to the driver to report login 
status after login completes.



For DDBs which represent 
a Normal Target, driver initi-
ates login using mailbox 
command. Then, the firm-
ware posts an AEN to the 
driver to report the login 
status after login com-
pletes.

2

Target 
Persistence

Persistence is main-
tained by storing Discov-
ery Target and Normal 
Target records on the 
adapter Flash using the 
QLogic application

 a

. 

Persistence is maintained by 
storing Discovery Target and 
Normal Target records in the 
local file system using the 
iscsiadm tool.