Emulex LP1005DC-CM2 Bedienungsanleitung PDF herunterladen (Seite 67)

Driver for Linux - Configuration Section Page 61

Example of Temporary Per Adapter Configuration

You want to temporarily set lun_queue_depth to 20 (default is 30) for host bus adapter #1. Load the

driver with the following command:

insmod lpfc lpfc1_lun_queue_depth=20

Create a New Ramdisk Image

The lpfc-install script creates a ramdisk containing the lpfc driver for the currently running kernel on

systems running Red Hat Enterprise Linux or SuSE Linux Enterprise Server.

To create a new initial ramdisk image:

1. Execute the lpfc-install script using the '--createramdisk' option. Type:

lpfc-install --createramdisk

Set Up LUN Support

By default, the Linux kernel does not support multiple LUNs. To support multiple LUNs, edit /etc/lilo.conf

or for Linux on Power platforms /etc/yaboot.conf, and append the following line to the end of the file:

append="max_scsi_luns=X"

where: X is the number of LUNs per SCSI device, between 1 and 256.

Before you build a new kernel, run the ‘make menuconfig’ command and build a menu to configure the

kernel and drivers. This configuration menu contains SCSI options. Ensure that the SCSI option, ‘Probe

all LUNs’ is enabled.

Dynamically Add LUNs and Targets

The Emulex driver for Linux enables you to dynamically add LUNs and targets without unloading or

reloading the lpfc module and without resetting the adapter.

You can dynamically add LUNs and targets with the lpfc_lun_skip parameter enabled or disabled. The

lpfc_lun_skip parameter is contained in the lpfc.conf file and is disabled by default. For more information

about the lpfc_lun_skip parameter, or to change its setting, refer to "The Configuration File (lpfc.conf)"

topic in this manual.

To dynamically add LUNs and targets with lun_skip disabled (default):

1. Log on as 'root'.

2. Type:

# echo "scsi add-single-device <H> 0 <T> <L>" >/proc/scsi/scsi

Where:

• <H> represents the host ID of the host bus adapter.

• <T> represents the SCSI ID of the storage array.

Note: Refer to the lpfc.conf file for the correct parameter name and values for the parameter

you want to change.

Note: You must perform this step whenever the driver is rebuilt. For example, if you change

parameters within the lpfc.conf file and rebuild the driver.

Note: You must reboot the system for these changes to take effect.

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