EC2 · EBS · Intermediate
The volume changes its name
An application starts with an empty data directory after instance replacement.
INITIAL ALERT
An application starts with an empty data directory after instance replacement.
You are primary on-call. Establish the failure domain, protect healthy capacity, and choose the safest next action.
The expected EBS volume is attached and reports healthy.
The decisive evidence and solution remain locked inside the simulation.WHAT THIS TESTS
Production judgment across EC2 · EBS.
Compute incidents are rarely solved by rebooting first. The useful skill is distinguishing launch, bootstrap, capacity, identity, and storage faults from one another.
- 01Read EC2 lifecycle and bootstrap evidence
- 02Diagnose scaling and instance replacement failures
- 03Choose a narrow, reversible recovery
SIMULATION STRUCTURE
Four evidence layers. No answer shown here.
The full exercise unlocks each layer as you commit to decisions.
Alert
Confirm the reported symptom and customer impact.
Baseline
Compare the failing path with a known-good condition.
Finding
Identify the evidence that separates plausible causes.
Change
Choose a controlled recovery and a durable prevention step.
Can you make the call without seeing the solution?
Try three incidents free. Paid incidents unlock only after Stripe confirms lifetime access.