Knowledge Base  /  Disaster Recovery  /  SafeHaven 3
Knowledge Base  /  Disaster Recovery  /  SafeHaven 3

SafeHaven 3.1: Expanding SRN Storage

Updated by Josh Leporati on Nov 20, 2015
Article Code: kb/593

Article Overview

This article walks you through expanding the storage assigned to your SRN. You can assign new storage to current storage pools, or create a new pool on the SRN to assign the storage to. Storage from the SRN is used for all aspects of the SafeHaven protection from the Local Replica / Local Cache to Checkpoints, as well as temporary write space during test failover and failover scenarios.

Expanding SRN Storage

  1. Assuming that our SRN is contained within the CenturyLink Cloud we need to first go and add a new raw disk with the appropriate amount of disk space to our SRN. If your SRN is on-prem, proceed to add raw storage via the correct method pertinent to your environment.

    • Browse to the SRN in the Control Portal and click edit storage.


    • Select add storage and then raw disk.


    • Enter the correct disk size and then click apply. The job will go out to the queue to be completed.


  2. After the storage is added, open up the SafeHaven Console and connect to your cluster. From here, you can add the new storage to your SRN.

    • Select the SRN you added the new storage/disk to and then click Claim Storage Pool.


    • Select the correct new disk and choose either Create a new Storage Pool or Add to an existing Storage Pool to expand your current pool size. Next, click Claim.


    • Once claimed, you should see your total available space increase for the storage pool you either created or assigned to and indication that the claim job is completed.


Other Notes

Use caution when working with your SRN Storage Pools. These pools are used to maintain the SafeHaven replication data between your Production and DR-side systems. Typically, you want to increase 1 for 1, your Production SRN with you DR SRN when modifying space allocations - especially when in a local replica mode. Local cache mode does not require a 1 for 1 mirror. You should always understand your environment sizing requirements prior to adjusting SRN storage.

Some typical reasons to expand SRN storage would be:

  • Introduction of new servers or increased storage requirements on current servers - forcing you to exceed current SRN disk allocations
  • Increasing cache space to compensate for synchronized data issues
  • Addition of storage for Production SRN when initiating a failback from the DR environment to Prod AND when having used Local Cache mode in Production SRN
  • Increase of temporary white space used by SafeHaven when conducting failovers and failbacks