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:
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 PowerVault ME4 Series Storage System Support Matrix on the Dell Support web site.
Use the SAS cabling diagrams to cable the host servers directly to the storage system.
Identify SAS HBA initiators to connect to the storage system by doing the following:
Open a terminal session.
Run the
dmesg|grep scsi|grep slot command.
Record the WWN numeric name.
Register the host and create and map volumes
Log in to the
PowerVault Manager.
Access the Host Setup wizard:
From the Welcome screen, click
Host Setup.
From the Home topic, click
Action > Host Setup.
Confirm that you have met the listed prerequisites, then click
Next.
For cluster configurations, group hosts together so that all hosts within the group share the same storage.
If this host is the first host in the cluster, select
create a new host group, then provide a name and click
Next.
If this host is being added to a host group that exists, select
Add to existing host group. Select the group from the drop-down list, then click
Next.
NOTE:The host must be mapped with the same access, port, and LUN settings to the same volumes or volume groups as every other initiator in the host group.
For stand-alone hosts, select the
Do not group this host option, then click
Next.
On the Attach Volumes page, specify the name, size, and pool for each volume, and click
Next.
To add a volume, click
Add Row. To remove a volume, click
Remove.
NOTE:Dell recommends that you update the name with the hostname to better identify the volumes.
On the Summary page, review the host configuration settings, and click
Configure Host.
If the host is successfully configured, a
Success dialog box is displayed.
Click
Yes to return to the Introduction page of the wizard, or click
No to close the wizard.
Enable and configure DM Multipathing
NOTE:Safeguard and block internal server disk drives from multipathing configuration files. These steps are meant as a basic setup to enable DM Multipathing to the storage system. It is assumed that DM Multipathing packages are installed.
Run the
multipath –t command to list the DM Multipathing status.
If no configuration exists, use the command information that is listed in step 1 to copy a default template to the directory
/etc.
If the DM multipathing kernel driver is not loaded:
Run the
systemctl enable multipathd command to enable the service to run automatically.
Run the
systemctl start multipathd command to start the service.
Run the
multipath command to load storage devices along with the configuration file.
Run the
multipath –l command to list the
ME4 Series storage devices as configured under DM Multipathing.
Create a Linux file system on the volumes
Perform the following steps to create and mount an XFS file system:
From the
multipath –l command output, identify the device multipathing to target creating a file system.
In this example, the first time that multipathing is configured, the first device is
/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 command also identifies block devices per controller.
Run the
mkfs.xfs/dev/mapper/mpatha command to create an xfs type file system.
Run the
mkdir/mnt/VolA command to create a mount point for this file system with a referenced name, such as VolA.
Run the
mount /dev/mapper/mpatha /mnt/VolA command to mount the file system.
Begin using the file system as any other directory to host applications or file services.
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.
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