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 or AIX_APPCM), 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), such as Subsystem Device Driver Path Control Module (SDDPCM), if it is installed.

Examples

  1. 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
DS4100           AIX_APPCM           AIX_APPCM
DS4200           AIX_APPCM           AIX_APPCM
DS4300           AIX_APPCM           AIX_APPCM
DS4500           AIX_APPCM           AIX_APPCM
DS4700           AIX_APPCM           AIX_APPCM
DS4800           AIX_APPCM           AIX_APPCM
DS3950           AIX_APPCM           AIX_APPCM
DS5020           AIX_APPCM           AIX_APPCM
DCS3700          AIX_APPCM           AIX_APPCM
DS5100/DS5300    AIX_APPCM           AIX_APPCM
DS3500           AIX_APPCM           AIX_APPCM
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
  2. 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