1Z0-997-26 Workload Migration Practice Question
An architect is migrating a multi-tier enterprise web application from an on-premises data center to OCI using the Lift and Shift Migration tool. During the migration assessment phase, the migration agent reports that several source VMs have unsupported guest operating system kernels and specific block device partitioning that cannot be directly converted by the OCI Image Builder. What is the recommended remediation strategy before initiating the bulk instance migration?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Export the source VMs as custom VMDK/QCOW2 images, upload them to OCI Object Storage, and import them as OCI Custom Images to provision new instances.
When source VMs have incompatible kernels or partitioning schemes that prevent automated conversion by OCI migration tooling, the recommended approach is to manually build a custom QCOW2 or VMDK image that is OCI-compatible, upload it to OCI Object Storage, and import it as a Custom Image.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Use Oracle Zero Downtime Migration to rewrite the kernel binary during the transition phase.
Why it's wrong here
Oracle ZDM is strictly for Oracle Database migrations, not general virtual machine operating system conversions.
- ✓
Export the source VMs as custom VMDK/QCOW2 images, upload them to OCI Object Storage, and import them as OCI Custom Images to provision new instances.
Why this is correct
Importing custom images allows administrators to bypass automated tool limitations by using pre-configured, compatible guest OS images.
- ✗
Deploy OCI Full Stack Disaster Recovery to automatically fix and patch the kernel partitions upon boot.
Why it's wrong here
Full Stack Disaster Recovery orchestrates DR drills and failovers; it does not perform in-flight OS kernel or partition rewriting.
- ✗
Convert the instances directly into OKE worker nodes using the OCI Migration Workbench.
Why it's wrong here
Converting a monolithic VM with custom partitions directly into a Kubernetes worker node is technically invalid and outside the scope of lift-and-shift.
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Written and reviewed by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
Last reviewed August 2026 · checked against the official Oracle exam blueprint
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