manage_disk_drivers Command

Purpose

Displays information about storage families and the driver that manages each family or changes the driver that manages a storage family.

Syntax

manage_disk_drivers [ -l ]

manage_disk_drivers [ -d [ device ] ] [ -o [ driver_option ]

manage_disk_drivers [ -h ]

Description

The manage_disk_drivers command displays a list of storage families and the driver that manages or supports each family. A storage family is a storage model. All disks within the family must be managed by the same driver.

There are two types of drivers supported: multipath I/O (MPIO) and non-MPIO. Most users select the MPIO version of the driver (AIX_AAPCM ), which is the default behavior. However, there are instances where a third-party mulitpath driver is installed. In this case, you might want to disable the built-in AIX® MPIO feature. You can perform this operation by selecting the AIX_non_MPIO option as the driver option.

Note: Not all the storage families support the AIX_non-MPIO driver.

If you specify the -d flag with the storage device name, the manage_disk_drivers command changes the driver selection to the alternate supported driver that is specified with the -o flag.

The manage_disk_drivers command saves the Object Data Manager (ODM) database that reflects the driver change, and displays a message to restart the system for the change to take effect.

Flags

Item	Description
-l	Lists all the storage devices and their supported drivers.
-d	Specifies the storage device family when you are selecting a driver. Note: The -o flag is required to use this flag.
-o	Specifies the driver to be used for the selected storage family. Note: The -d flag is required to use this flag.

NO_OVERRIDE driver option

If the present driver attribute is set to NO_OVERRIDE, the AIX operating system selects an alternate path control module (PCM), for example, a storage vendor PCM, if it is installed.

Examples

To list all the storage families and their supported drivers, enter the following command:

manage_disk_drivers -l

The system displays a message similar to the following example:

Device           Present Driver      Driver Options
2810XIV          AIX_AAPCM           AIX_AAPCM,AIX_non_MPIO
XIVCTRL          MPIO_XIVCTRL        MPIO_XIVCTRL,nonMPIO_XIVCTRL
2107DS8K         NO_OVERRIDE         NO_OVERRIDE,AIX_AAPCM,AIX_non_MPIO
IBMFlash         NO_OVERRIDE         NO_OVERRIDE,AIX_AAPCM,AIX_non_MPIO
IBMSVC           NO_OVERRIDE         NO_OVERRIDE,AIX_AAPCM,AIX_non_MPIO

To modify the driver to use the AIX_non_MPIO option that manages 2810XIV device, enter the following command:

manage_disk_drivers -d 2810XIV -o AIX_non_MPIO

The system displays a message similar to the following example:

# manage_disk_drivers -d 2810XIV -o AIX_non_MPIO
********************** ATTENTION *************************
For the change to take effect the system must be rebooted