Setting queue depth with QLogic HBAs

Configure your host that is running the Linux operating system to allow a maximum queue depth of four.

Configure your host that is running the Linux operating system. For more information, see the documentation on software installation and configuration, and on the command-line interface.

Complete the following steps to set the maximum queue depth:

Add the following line to the /etc/modules.conf file:
For the 2.4 kernel (SUSE Linux Enterprise Server 8 or Red Hat Enterprise Linux 3):
```
options qla2300 ql2xfailover=0 ql2xmaxqdepth=new_queue_depth
```
For the 2.6 kernel (SUSE Linux Enterprise Server 9, or later, or Red Hat Enterprise Linux 4, or later):
```
options qla2xxx ql2xfailover=0 ql2xmaxqdepth=new_queue_depth
```
Rebuild the RAM disk that is associated with the kernel that is being used by using one of the following commands:
- If you are running on a SUSE Linux Enterprise Server operating system, run the mk_initrd command.
- If you are running on a Red Hat Enterprise Linux operating system, run the mkinitrd command and then restart.