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Disaster recovery support matrix, prerequisites, and limitations

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Note: Disaster Recovery is supported on both, Public and Gov Cloud.

Support Matrix

Disaster Recovery supports failover and failback on the following operating systems:

Operating system

Editions

File System
 

Partition Type
 

Windows (64-bit)
  • Microsoft Windows Server 2022 (Standard, Datacenter)
  • Microsoft Windows Server 2019 (Standard, Datacenter)
  • Microsoft Windows Server 2016 (Standard, Datacenter)
  • Microsoft Windows Server 2012 R2 (Standard, Datacenter)
  • Microsoft Windows Server 2012 (Standard, Datacenter)

NTFS

ReFS

 

 

 

 Primary/GPT/MBR/Dynamic disk

Linux (64-bit)

  • Red Hat Enterprise Linux (RHEL) 7.0- 8.4(BIOS)
    7.4-8.4(UEFI)

  • CentOS  7.0-8.4 (BIOS), 7.4-8.4(UEFI)

  • Ubuntu 14.04, 16.04, 18.04, 20.04

  • SUSE Linux Enterprise Server 12 SP 3, 12 SP 5, 15.0 SP 2

  • Fedora: 30, 31, 32, 33

  • Oracle:  7.0-8.4 (BIOS), 7.5-8.4  (UEFI)

EXT2/EXT3/EXT4/LVM/XFS

Primary/Extended

Notes:

  • Windows:

    • Disaster Recovery does not support failback on the FAT and FAT 32.

    • Disaster Recovery does not support failback on the Extended partition on Windows.

    • Disaster Recovery supports failback on the Dynamic disk. During failback, Disaster Recovery converts the dynamic disk to basic disk.

    • ReFS is supported for failover. For failback, ReFS is converted to NTFS.

  • Linux:

    • Linux RAID configuration is not supported.

Supported AWS regions

To know the AWS regions that Druva supports for disaster recovery, see the Downloads page. 

In addition, AWS provides other regions that Druva can support for disaster recovery. For more information on regions that AWS provides, see Global Cloud Infrastructure. To know more about the regions that Druva can support for disaster recovery, but are not listed in the previous list, contact Support.

Supported AWS instance types

The following instance types are supported for failover. The instance types are displayed based on the region you have selected and the instances supported by Druva.

Instance Family Supported instance types
General

m4.xlarge, m4.large , m4.2xlarge , m4.4xlarge , m4.10xlarge , m4.16xlarge

m5.large , m5.2xlarge , m5.4xlarge , m5.10xlarge , m5.16xlarge

t2.medium , t2.large , t2.xlarge , t2.2xlarge

Note:

  • We've discontinued support for t2.micro and t2.small EC2 instance types for DR failovers. If you've selected t2.micro or t2.small instance types in the failover settings for virtual machines in existing DR plans, you must change the instance type to t2.medium or higher. These instances will automatically be upgraded to t2.medium if you run a DR failover without changing the instance type manually.

  • We recommend selecting the m5 or c5 instance type over the m4 or c4 instance type in the failover settings. If the Auto Assign field is enabled in the failover settings, m5 or c5 instance type will be given precedence over the m4 or c4 instance type.
Compute optimized

c4.large , c4.xlarge , c4.2xlarge , c4.4xlarge , c4.8xlarge 

c5.large , c5.xlarge , c5.2xlarge , c5.4xlarge , c5.8xlarge
Accelerated Computing  g3.4xlarge , g3.8xlarge , g3.16xlarge ,  g2.2xlarge , g2.8xlarge 
Memory optimized  r4.large , r4.xlarge , r4.2xlarge , r4.4xlarge , r4.8xlarge , r4.16xlarge 
Storage optimized

 d2.xlarge , d2.2xlarge , d2.4xlarge , d2.8xlarge ,

 i2.xlarge , i2.2xlarge , i2.4xlarge , i2.8xlarge ,

 i3.large , i3.xlarge , i3.2xlarge , i3.4xlarge , i3.8xlarge , i3.16xlarge

Disaster Recovery prerequisites if you are using Druva AWS proxy version 4.8.0 or later

  • Recommended instance types:
    While registering a Druva AWS proxy, it is recommended that you select an instance type of size/family with the following minimum configuration: 8 CPUs, 16 GB memory, 3500 Mbps bandwidth, 10,000 IOPS. For example:

    • General purpose: m4.xlarge | m4.2xlarge | m4.4xlarge | m4.8xlarge | m4.10xlarge | m5.xlarge | m5.2xlarge | m5.4xlarge | m5.12xlarge | m5.24xlarge

    • Compute optimized: c5.2xlarge | c5.4xlarge | c5.9xlarge | c5.18xlarge | c5n.large 

    Note: We recommend selecting the m5 or c5 instance type over the m4 or c4 instance type in the failover settings. If the Auto Assign field is enabled in the failover settings, m5 or c5 instance type will be given precedence over the m4 or c4 instance type.

  • You have set up the respective AWS Cloud/GovCloud account.

  • AWS account must have required permissions to create IAM Policy to delegate access to the AWS resources.

  • AWS account must have permissions to create multiple S3 buckets for each region.

  • Subnet entered in failover settings for each virtual machine should be able to reach AWS services like SQS and S3.

  • Security group should be selected appropriately if SSH/RDP is required.

  • All instances launched in public subnet must have a public IP address and the instances launched in private subnet must not have a public IP address.

  • Elastic public IPs should be selected based on available Elastic IPs in the AWS account.

  • Static private IP should be selected appropriately based on the subnet’s Classless Inter-Domain Routing (CIDR) block.

  • IAM role should have the same policies as that available on Hybrid Workloads Management Console.

  • VM should have a minimum of 1 GB free space on the boot partition.

  • If the VM has an outdated Kernel, it will be updated on failover.

    •
  •  

Subnet prerequisite  for Druva AWS proxy deployment

The Druva services should be available in the availability zone for the subnet that you intend to select during the Druva AWS proxy deployment. Perform the following tasks to determine if the chosen subnet can be selected for the Druva AWS proxy deployment or not.

  1. Copy the Druva backup service name that corresponds to the region where you intend to deploythe Druva AWS proxy from the following table:
    Region Druva backup service name
    ap-south-1 com.amazonaws.vpce.ap-south-1.vpce-svc-018246eb6465a0732
    ap-east-1 com.amazonaws.vpce.ap-east-1.vpce-svc-0ca7ac8221c563a68
    us-east-1 com.amazonaws.vpce.us-east-1.vpce-svc-0a9aa0b682d3a980d
    ap-northeast-1 com.amazonaws.vpce.ap-northeast-1.vpce-svc-040be8f24b45eaf82
    eu-west-1 com.amazonaws.vpce.eu-west-1.vpce-svc-0107991f549b4b600
    ap-southeast-1 com.amazonaws.vpce.ap-southeast-1.vpce-svc-07babd8b6998f4a47
    ca-central-1 com.amazonaws.vpce.ca-central-1.vpce-svc-0f00d5cda0c16b14d
    ap-southeast-2 com.amazonaws.vpce.ap-southeast-2.vpce-svc-055b8fc235e64c402
    us-west-2 com.amazonaws.vpce.us-west-2.vpce-svc-07023e0ed04c643fe
    eu-north-1 com.amazonaws.vpce.eu-north-1.vpce-svc-0c7c6031bcbc8cdfa
    us-gov-west-1 com.amazonaws.vpce.us-gov-west-1.vpce-svc-03c28740ddbae131f
    us-west-1 com.amazonaws.vpce.us-west-1.vpce-svc-05274b103d6b1c796
    eu-central-1 com.amazonaws.vpce.eu-central-1.vpce-svc-06a20c5470ce8207a
    sa-east-1 com.amazonaws.vpce.sa-east-1.vpce-svc-02eaa75795ee6efc3
    eu-west-2 com.amazonaws.vpce.eu-west-2.vpce-svc-04758dcfbe68314ca
    eu-west-3 com.amazonaws.vpce.eu-west-3.vpce-svc-02d8fa4171c9495a2
  2. Log in to the AWS Management Console. Ensure you are logged into the region where you want to deploy the Druva AWS proxy.

  3. From the search bar at the top, search for and navigate to the VPC service.

  4. In the navigation pane on the left, under VIRTUAL PRIVATE CLOUD, click Endpoints.

  5. On the Endpoints page, click Create Endpoint.
    Create Endpoint.png

  6. On the Create Endpoint page, under the Service category click Find service by name.

  7. In the Service Name field, paste the service name that you copied in step 1. Click Verify.

Note: After clicking Verify, you will see the service name not found error. This is because the Druva backup service hasn’t been created yet. It will be created as part of the Druva AWS proxy deployment. Ignore the message.
Search for service availability.png

  1. In the VPC dropdown, select the VPC that you want to use for the Druva AWS proxy deployment. Ensure that the Druva service is available in the availability zone for the subnet that you intend to use. If the service is available in the availability zone, proceed with the Druva AWS proxy deployment. Else repeat the verification for an alternate VPC and a different subnet where the Druva service is available in the Availability Zone. 

  2. In the Create Endpoint page, click Cancel.  

Virtual machine prerequisites if you are using Druva AWS proxy version 4.8.0 or later

Before you set up Disaster Recovery, go through the following:

  • In case of Linux virtual machines, if there are any devices in fstab mounted at the time of booting up, those devices will not be available in the EC2 instance created after failover.

  • Virtual machine must not have multi-boot partitions.

  • Virtual machine must not boot in the recovery mode.

  • Disks should be online and formatted for Windows.

  • Disks should be formatted and mounted for Linux.

  • "/" and "/boot" should be on the same disk for Linux.

Limitations (for Druva AWS proxy version 4.8.0 or later)

AWS Limitations

  • VMDK disk size should not be greater than 16TB - EBS volume supports up to 16TB.

Druva AWS proxy Limitations

  • The update DR copy job does not support restore of VM having the number of VMDKs more than 21. To be able to successfully restore a VM with 21 VMDKs ensure that only one update DR copy job is running on Druva AWS proxy.
  • Disaster Recovery does not support VMware Paravirtual SCSI.

DR Restore Limitations

During DR restore, Druva does not support custom tagging for EBS volumes that are being created.

Failover Limitations

  • DR failover does not support multiple NICs. Failover Instance will have only one NIC with Public-IP and Private-IP as configured in failover settings of the DR plan.
  • Failover for Windows 2008 non R2 will work only with t2  instance type. 
  • If the VM's firmware is UEFI, and if you have not upgraded your AWS and backup proxies to version 6.3.1 or later, then Failover EC2 instance with BIOS firmware will be launched by performing appropriate modifications on the disks.

  • You cannot select a VM if it is of UEFI firmware, and the source VM has a boot disk that is more than 2 TB in size or has more than 4 partitions in the boot disk.

  • AWS supports booting of the EC2 instance only in BIOS mode for the following operating systems even if the source VM might be of UEFI firmware in the vCenter. Druva does not support the failover conversion of such VMs.

    • RHEL 7.0 to 7.3

    • Centos 6.3 to 7.3

    • Oracle Linux 6.1 to 7.4

    • Suse linux 11 SP1 to 12 SP1

    • Ubuntu version below 14.04 

    • For more information, see Key considerations.

Failback Limitations

  • Disaster Recovery does not allow you to resume failback on backup proxy with version earlier than 4.8.8_80128.
  • DR failbacks will fail if a VM had an NVMe controller or disk and was configured for DR.

Windows Limitations

  • Windows Dynamic Disk as a boot partition is not supported.
  • Windows extended partitions are not supported.
  • Clustered drives are not supported: if your Windows Servers are a part of a cluster, exclude the clustered drive and perform the migration using the system drive only.

Linux Limitations

  • Linux LVM with extended partitions is not supported.
  • RAID configurations are not supported.