Deployment Guide

a. Run the systemctl enable multipathd command to enable the service to run automatically.
b. Run the systemctl start multipathd command to start the service.
4. Run the multipath command to load storage devices in conjunction with the configuration file.
5. Run the multipath –l command to list the Dell EMC PowerVault ME4 Series storage devices as configured under DM
Multipath.
Create a Linux file system on the volumes
Perform the following steps to create and mount an XFS file system:
1. From the multipath –l command output above, identify the device multipath to target creating a file system.
In this example, the first time multipath is configured, the first device will be /dev/mapper/mpatha, which corresponds to
sg block devices /dev/sdb and /dev/sdd.
NOTE: Run the lsscsi command to list all SCSI devices from the Controller/Target/Bus/LUN map. This also identifies
block devices per controller.
2. Run the mkfs.xfs/dev/mapper/mpatha command to create an xfs type file system.
3. Run the mkdir/mnt/VolA command to create a new mount point for this file system with a referenced name, such as
VolA.
4. Run the mount /dev/mapper/mpatha /mnt/VolA command to mount the file system.
5. Begin using the file system as any other directory to host applications or file services.
6. Repeat steps 1-5 for other provisioned volumes from the PowerVault Manager. For example, /dev/mapper/mpathb
corresponds to sg block devices /dev/sdc and /dev/sde.
SAS host server configuration for Linux
The following sections describe how to configure SAS host servers running Linux:
● Complete the PowerVault Manager guided system and storage setup process.
● Refer to the cabling diagrams within this guide before attaching a host to the storage system; careful planning will ensure a
successful deployment.
● Administrative or privileged user permissions are required to make system-level changes. These steps assume root level
access and that all required software packages are already installed (for example, DM Multipath).
Attach a Linux host with SAS HBAs to the storage system
Perform the following steps to attach the Linux host with SAS HBAs to the storage system:
1. Ensure that all HBAs have the latest supported firmware and drivers as described on the Dell Support web site. For a list of
supported SAS HBAs, see the Dell EMC ME4 Series Storage System Support Matrix on the Dell Support web site.
2. Use the SAS cabling diagrams to cable the host servers directly to the storage system.
3. Identify SAS HBA initiators to connect to the storage system by doing the following:
a. Open a terminal session.
b. Run the dmesg|grep scsi|grep slot command.
c. Record the WWN numeric name.
Register the host and create and map volumes
1. Log in to the PowerVault Manager.
2. Access the Host Setup wizard:
● From the Welcome screen, click Host Setup.
● From the Home topic, click Action > Host Setup.
3. Confirm that you have met the listed prerequisites, then click Next.
4. Type a hostname in the Host Name field.
5. Using the information from step 3 of Attach a Linux host with SAS HBAs to the storage system on page 55, select the SAS
initiators for the host you are configuring, then click Next.
6. Group hosts together with other hosts.
Perform host setup
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