how to find Default queue depth settings (qlogic iscsi hba)

After  adjust the queue depth for an HBA:

1. Verify which HBA module is currently loaded by entering one of the following commands on the service console:
   
   For QLogic:
   
   
   vmkload_mod -l | grep qla
   
   For Emulex:
   
   
   vmkload_mod -l | grep lpfc
   
   
2. Run one of these commands:
   
   Note: The examples show the QLogic qla2xxx and Emulex lpfc820 modules. Use the appropriate module based on the outcome of the previous step.
   
   For QLogic:
   
   
   esxcfg-module -s ql2xmaxqdepth=64 qla2xxx
   
   For Emulex:
   
   
   esxcfg-module -s lpfc0_lun_queue_depth=64 lpfc820
   
   In this case, the HBAs represented by ql2x and lpfc0 will have their LUN queue depths set to 64.
   
   
3. Reboot your host.

   4. ESX HOST 4.0 shows error

   /bib/sh: can't access tty; job control turned off.

and give the option to boot from troubleshooting mode,after booting from troubleshooting mode it works properly but not able to connect in Vcenter Server.

and not able to see the datastores in the ESX Host.

How to resolve this issue and How to find the Default queue depth settings for (qlogic hba)