350-601 Storage Network Practice Question
A storage array uses thin provisioning. A volume is created with a virtual size of 1 TB but only 100 GB of physical storage is allocated initially. What happens when the host writes data beyond the currently allocated physical space?
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
✓
The array automatically extends the volume by allocating more physical blocks from the pool.
Thin provisioning allocates physical storage on demand. Additional storage is allocated from a shared pool as needed. The array may overcommit, but writes succeed as long as pool has free space.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
The write fails immediately.
Why it's wrong here
If the pool has space, the write succeeds after allocation.
- ✓
The array automatically extends the volume by allocating more physical blocks from the pool.
Why this is correct
Thin provisioning allocates on demand.
- ✗
The host must reconfigure the volume size.
Why it's wrong here
No host reconfiguration needed; the array handles allocation.
- ✗
The volume is expanded to 1 TB physical.
Why it's wrong here
Physical allocation grows incrementally, not all at once.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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