LFCS Storage Management Practice Question
Network Topology
Which TWO commands should the administrator run to identify and fix the duplicate PV?
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
✓
pvscan --cache
Options A and C are correct. Option A, pvscan --cache, rebuilds the LVM cache to update the view of available PVs and often removes duplicate entries. Option C, vgreduce --removemissing vg00, removes the missing PV from the volume group, which is appropriate after confirming the unknown PV is no longer available. Option B (vgextend) is wrong because adding a new PV does not resolve the duplicate issue. Option D (vgimportclone) is wrong because vgimportclone is used to import a cloned volume group, not for removing duplicates. Option E (pvremove) is wrong because pvremove is destructive and would remove the PV metadata from /dev/sdc1, which might still be valid.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
pvscan --cache
Why this is correct
Rebuilds LVM cache to refresh PV information and often resolves duplicate entries.
- ✗
vgextend vg00 /dev/sdd1
Why it's wrong here
Adding a new PV does not address the duplicate or missing PV issue.
- ✓
vgreduce --removemissing vg00
Why this is correct
Removes missing PVs from the volume group, which is the standard way to clean up duplicates after confirming the PV is unavailable.
- ✗
vgimportclone /dev/sdc1
Why it's wrong here
vgimportclone is used when a whole volume group is cloned, not for duplicate PV removal.
- ✗
pvremove /dev/sdc1
Why it's wrong here
pvremove would destroy the PV metadata on /dev/sdc1, but that physical volume may still be needed and working.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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