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InfoScale™ Operations Manager 9.0 User's Guide

Last Published: 2025-04-24

Product(s): InfoScale & Storage Foundation (9.0)

Platform: AIX,HP-UX,Linux,Solaris,VMware ESX,Windows

Mirroring: Protection from hardware failures

One of the major threats to the proper retention of data is the hardware failure that can happen to the disks in your data center. This affects the availability of the data in the disks. To prevent this situation, you can mirror the disks or the volumes in your environment. While the mirroring for the volumes is done in the context of the hosts, the mirroring of disks is done from enclosures. This document discusses the mirroring of the volumes that is performed from the context of the hosts.

In Arctera InfoScale Operations Manager, you can configure two types of mirrors for a volume from the host context: a normal mirror, and a snapshot mirror. While the normal mirror acts as a substitute for the volume, the snapshot mirror can be detached from the original volume at a later period so that you can keep this mirror as a snapshot of the original volume. Mirrors for the volumes are created using the plexes available on the unutilized disks that are part of the disk group of the original volume. The disks used for additional mirrors should not be already in use by the volume. When the data is written to the original volume, its mirror is also updated concurrently. When the original volume is not available for data retrieval due to hardware failures, the volume data is still accessible from its unaffected mirror.

To perform this task, your user group must be assigned the Admin role on the host or the Server perspective. The permission on the host may be explicitly assigned or inherited from a parent Organization.

For more information on mirrored volumes, refer to the Storage Foundation Administrator's Guide.

To add a datavol mirror to a volume

In the Management Server console, go to the Server perspective and expand Manage in left pane.
Expand the Organization or Uncategorized Hosts to locate and select the host.
Expand the host and select Volumes.
Right-click on the required volume and select Mirror > Add.
In the Add mirror - Options wizard panel, select Add mirror and specify the required information. Click Next.
If you have opted to select the disks manually, select the disks from the Disk selection panel. To search for disks using one or more filter criteria, click Edit. Click Next.
In the Advanced options for Add mirror panel, specify the required information. Click Next.
In the Add mirror summary verify the details that you have specified for adding mirrors. Click Finish.
In the Result panel, verify that the mirrors have been added successfully.

To add a snapshot mirror to a volume

In the Management Server console, go to the Server perspective and expand Manage in left pane.
Expand the Organization or Uncategorized Hosts to locate and select the host.
Expand the host and select Volumes.
Right-click on the required volume and select Mirror > Add.
In the Add mirror - Options wizard panel, select Add snap-ready mirror and specify the required information. Click Next.
If you have opted to select the disks manually, select the disks from the Disk selection panel. To search for disks using one or more filter criteria, click Edit. Click Next.
In the Add mirror - Summary verify the details that you have specified for adding mirrors. Click Finish.
In the Result panel, verify that the mirrors have been added successfully.

See Example: Ensuring the correct level of protection for volumes controlled by Storage Foundation.