User`s guide

5 – Red Hat Linux Driver Installation

System Driver Parameter max_scsi_luns

IS0053302-00 7 PRELIMINARY 5-9

d. Restart the system. The new kernel image containing the qla4010 driver is

now the default boot image.

For GRUB, perform the following steps:

a. Add a section for newKernel in the /etc/grub.conf file. For example:

title Red Hat Linux-newKernel (2.4.7-10)

root (hd0,0)

kernel /newKernel ro root=/dev/hda2

b. Restart the system. The new kernel image containing the qla4010 driver is

now the default boot image.

5.4

System Driver Parameter max_scsi_luns

Support for multiple LUNs can be configured in one of three ways. Currently, the

maximum number of LUNs that can be scanned for each device is 128.

The kernel must be configured to have multiple LUN support enabled for nonzero

LUNs to be configured and accessible. Use the make menuconfig command to

build a kernel that has the option under SCSI Support enabled to probe all LUNs

on SCSI devices. See the BUILD_KERNEL.txt file for more information on the make

menuconfig command.

NOTE: If you have multiple HBAs, set max_scsi_luns to the largest number of

LUNs supported by any one of these HBAs.

■

To configure multiple LUN support during boot time, type the following at the boot

prompt:

boot: linux max_scsi_luns=128

■

If the SCSI Mid-Layer is compiled as a module, add the following line to the

/etc/modules.conf file to scan for multiple LUNs at each boot:

option scsi_mod max_scsi_luns=128

NOTE: You must create a RAMDISK image for this modification to take effect.

■

If the SCSI Mid-Layer is compiled in the kernel, the boot loader can be configured

to scan for multiple LUNs each time the system boots.

For LILO, perform the following steps:

1. Add the following line to each of the kernel images listed in the /etc/lilo.conf

file:

append="max_scsi_luns=128"