I’m learning for the VMCE Exam. There’s a question with this correct answer:
Question: An infrastructure with 50 VMs has a power outage. After the VMware cluster hast booted up again, three large VMs seem to be stuck in a boot loop.
Assuming only the OS is installed on the VM OS disk, which method would require the least amount of backup data transferred to allow the VMs to boot?
Correct answer: Perform a Virtual Disk Restore with the quick rollback feature disabled.
Why it’s not with the quick rollback feature enabled?
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Hi,
Where did you find this VMCE Exam Question?
Check the text specific to a quick rollback. It specifically states “Do not use this option when recovering from disaster caused by hardware or storage issue, or power loss”
Rasmus is the man to listen to.
Thank you.
@asengineer Hi, you can use “quick rollback” only when you need to restore from a software failure, such as, delete files, patches.
Pay closer attention on the limitations
For quick rollback, Veeam Backup & Replication uses the Changed Block Tracking technology. Veeam Backup & Replication gets information about the current VM state and compares it with the CBT information in the backup file. This way, Veeam Backup & Replication detects what data blocks must be transported back to the production datastore to rebuild the VM or VM disk to the necessary point in time.
Quick rollback is recommended for resolving issues that occurred at the level of the VM guest OS — for example, if there has been an application error or a user has accidentally deleted a file on the VM guest OS. Do not use quick rollback if the problem has occurred at the VM hardware level, at the storage level, or due to a power loss
