HP B- Accelerators Linux manual Using the init script, $ chkconfig --del iomemory-vsl, Iodrive=0

NOTE: The init script is part of the fio-sysvinitpackage, which must be installed before you can enable the init script.

To disable this loading of the IO Accelerator driver, enter the following command:

$ chkconfig --del iomemory-vsl

To re-enable the driver loading in the init script, enter the following command:

$ chkconfig --add iomemory-vsl

For more details, see "Using the init script (on page 19)".

Using udev

On systems that rely on udev to load drivers, if you want to prevent udev from auto-loading the IO Accelerator at boot time, users must modify a drivers option file.

To modify the drivers option file:

1.Locate and edit the /etc/modprobe.d/iomemory-vsl.conffile, which contains the following line:

# blacklist iomemory-vsl

2.To disable loading, remove the # from the line, and then save the file.

3.Reboot Linux. The IO Accelerator will not load from udev.

4.To restore the udev-loading of the IO Accelerator, replace the # to comment out the line.

CAUTION: The version of udev on RHEL4u7/CentOS4u7 and earlier does not support the blacklist directive. Even if the driver is blacklisted as documented, udev will load the driver. To blacklist the driver in these versions, put the name of the driver on a separate line in the /etc/hotplug/blacklist file.

For example: iomemory-vsl

Disabling the loading on either udev or init script systems

Users can disable the loading of the IO Accelerator driver at boot time on either udev or init script systems. Disabling prevents the auto_attach process for diagnostic or troubleshooting purposes. To disable or enable the auto_attach functionality, follow the steps in "Disabling auto_attach ("Disabling auto attach" on page 38)."

Alternatively, you can prevent the driver from loading by appending the following parameter at the kernel command line of your boot loader:

iodrive=0

However, HP does not recommend this method, because it prevents the driver from functioning at all and limit the amount of troubleshooting you can perform.

Using the init script

The installation process places an init script in the /etc/init.d/iomemory-vslfile. This script uses the setting options found in the options file in /etc/sysconfig/iomemory-vsl.The options file must have ENABLED set (non-zero) for the init script to be used:

ENABLED=1

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