Configuring External Storage in a Newly Installed Release 7.4.x System

After you install an everRun system, you can connect and configure external storage. everRun systems support Fibre Channel and iSCSI storage systems.

To configure external storage in a newly installed Release 7.4.x system

Perform the following steps on node0, first, and then on node1:

1. Edit the /etc/lvm/lvm.conf file, adding the boot disk and data disk(s) to the filter entry. The following steps are an example:

   1. Uncomment the filter entry.

   2. Add the boot disk a/sda/ and any internal data disk(s) installed in the system to the filter entry. The following example is for a system with a data disk sdb:

      filter = [ "a/sda/", "a/sdb/" ]

2. Configure multipath, as described in Configuring Linux Multipathing.

3. Configure external storage, as described in Adding or Removing External Storage LUNs as well as the instructions provided by your external storage system vendor.

   If the system is connected to iSCSI external storage, copy (or make note of) the new iSCSI 'iqn' from the PM you replaced and update the PM's host entry in the external storage array with the new 'iqn'. You must perform this step before you can map the new LUNs to the new PM

4. Create new LUNs on the external storage array and map them to new PM.

5. Create new storage groups.

   For example, if you map two LUNs, one 250 GB and one 750 GB, to the node, you could create the new storage groups StorageGroup_250GB and StorageGroup_750GB.

6. Rescan the node in order to discover new LUNs by issuing echo commands (for additional information, see Adding or Removing External Storage LUNs).

   The following commands are examples:
   echo "- - -" > /sys/class/scsi_host/host1/scan
   echo "- - -" > /sys/class/scsi_host/host6/scan

   After the scan, you can view the new LUNs in the everRun Availability Console by navigating to the Storage tab of the Physical Machines page. See The Physical Machines Page.

7. Place the LUNs into the appropriate storage group (created in Step 5, above). For example, place the 250 GB LUN in StorageGroup_250GB.

Repeat this procedure on the other node.

Related Topics

Getting Started

External Storage

Managing External Storage

Replacing a Failed Physical Machine Connected to External Storage