Emulex 3.4 User Manual

All HBA-specific parameters have an lpfcX_ prefix (where X is the driver instance number); e.g., setting 
lpfc0_lun_queue_depth= 20 makes 20 the default number of maximum commands which can be sent to 
a single logical unit (disk) for lpfc instance 0.

Dynamic parameters do not require the driver to be unloaded and reloaded for changes to take effect.

lpfc_use_adisc

0

0=Off

1=On

Sends ADISC instead of 
PLOGI for device discovery or RSCN.

lpfc_hba_queue_depth  

8192

0

8192

Yes

Maximum number of FCP 
commands that can queue to an 
Emulex HBA. 

lpfc_initiator_login   

0

0

1

Yes

Enables logins to other virtual 
initiators.

lpfc_ack0

0

0=Off

1=On

No

Use ACK0 for class 2.

lpfc_automap

1

0=Off

1=On

No

Automatically assign SCSI IDs to 
FCP targets detected.

lpfc_check_cond_err

0

0=Off

1=On

Yes

Treat certain FCP check conditions 
as FCP RSP errors.

lpfc_cr_count

1

1

255

No

This parameter determines the 
values for I/O coalescing for 
cr_delay (msec) or cr_count 
outstanding commands. 

lpfc_cr_delay

0

0

63

No

This parameter determines the 
values for I/O coalescing for 
cr_delay (msec) or cr_count 
outstanding commands.

lpfc_delay_rsp_err

0

0=Off

1=On

Yes

Treat FCP RSP errors like no-
device-delay.

lpfc_discovery_threads

1

30

64

No

Specifies the maximum number of 
ELS commands that can be 
outstanding for a discovery.

lpfc_dqfull_throttle_up_inc

1

0

128

Yes

Amount to increment LUN queue 
depth each time.

lpfc_dqfull_throttle_up_tim
e

1

0

30

Yes

Time interval, in seconds, to 
increment LUN queue depth.

lpfc_extra_io_tmo

0

0

255

Yes

Extra FCP cmd timeout when 
connected to a fabric (in seconds).