Lenovo ThinkSystem DE Series Hardware Installation And Maintenance Manual page 74

• Enable AutoSupport – Automatically monitor the health of your storage array and have
dispatches sent to technical support.
Step 4. If you have not already created a volume, create one by going to Storage ➙ Volumes ➙ Create ➙
Volume.For more information, see the online help for ThinkSystem System Manager.
Configure the multipath software
Multipath software provides a redundant path to the storage array in case one of the physical paths is
disrupted. The multipath software presents the operating system with a single virtual device that represents
the active physical paths to the storage. The multipath software also manages the failover process that
updates the virtual device. You use the device mapper multipath (DM-MP) tool for Linux installations.
Before you begin
You have installed the required packages on your system.
• For Red Hat (RHEL) hosts, verify the packages are installed by running r r p p m m - - q q d d e e v v i i c c e e - - m m a a p p p p e e r r - -
m m u u l l t t i i p p a a t t h h .
• For SLES hosts, verify the packages are installed by running r r p p m m - - q q m m u u l l t t i i p p a a t t h h - - t t o o o o l l s s .
By default, DM-MP is disabled in RHEL and SLES. Complete the following steps to enable DM-MP
components on the host.
If you have not already installed the operating system, use the media supplied by your operating system
vendor.
If a multipath.conf file is not already created, run the # # t t o o u u c c h h / / e e t t c c / / m m u u l l t t i i p p a a t t h h . . c c o o n n f f command.
Step 1.
Use the default multipath settings by leaving the multipath.conf file blank.
Step 2.
Step 3. Start the multipath service.
# systemctl start multipathd
Step 4. Configure multipath for startup persistence.
# chkconfig multipathd on
Step 5. Save your kernel version by running the u u n n a a m m e e - - r r command.
# uname -r
3.10.0-327.el7.x86_64
You will use this information when you assign volumes to the host.
Step 6. Do one of the following to enable the m m u u l l t t i i p p a a t t h h d d daemon on boot.
If you are using....
RHEL 6.x systems:
RHEL 7.x systems:
SLES 12.x and 15.x systems:
Rebuild the i i n n i i t t r r a a m m f f s s image or the i i n n i i t t r r d d image under /boot directory:
Step 7.
If you are using....
RHEL 6.x and 7.x systems:
SLES 12.x and 15.x systems:
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ThinkSystem DE Series Hardware Installation and Maintenance Guide for 2U Enclosures
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