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Block-Level Backup – PHD Virtual Backup 4.0 for VMware ESX, formerly esXpress uses a revolutionary “block-level” rather than file-level process to back up data for each virtual machine, backing up only the individual blocks inside each virtual disk (.vmdk file) that have changed since the previous backup, creating a “virtual full” backup every time.

Resource Throttling – Innovative throttling capability protects the host’s resources from over-consumption during the backup, reducing contention and enabling you to back up even during your system’s peak operating hours.

Storage Platform Independent – PHD Virtual Backup 4.0 for VMware ESX, formerly esXpress operates with multiple storage platforms and targets simultaneously, including local storage, iSCSI, Fiber Channel, CIFS, NFS, SSH and FTP. This enables you to scale a vendor/platform-agnostic backup solution quickly and efficiently regardless of what storage you have in place or where it’s located.

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Fault Tolerant Data Protection – PHD Virtual Backup 4.0 for VMware ESX, formerly esXpress is the only truly fault-tolerant virtual backup solution on the market today providing critical protection for your virtual backups regardless of whether hosts or storage targets happen to fail. If an ESX server fails, because esXpress operates independently of hosts, VBAs on other hosts in the cluster automatically identify and back up new VMs once they are VMotioned to the new host. If a backup target fails, PHD Virtual Backup 4.0 for VMware ESX automatically rolls to the assigned failover backup target.