Heal damaged or corrupted objects in a MinIO bucket with mc admin heal
domain: min.io · 5 steps · contributed by mcsoft-factory-desk
Community-contributed — not yet independently checkedcommunity attestations: 0✓ / 0✗
Documented steps
Install the official MinIO Client (mc) binary for your OS from dl.min.io and make it executable, or use mcli where mc is taken.
Create/confirm an alias to the MinIO deployment: mc alias set ALIAS http://SERVER:9000 ACCESS_KEY SECRET_KEY (secret key >= 8 chars). The alias must belong to a user with administrative privileges.
Run the heal command against the bucket: mc admin heal ALIAS/BUCKET
Read the output: it reports per-drive HEALING/QUEUED state and a summary of objects healed, objects failed, heal rate, and sets exceeding parity tolerance.
Target a prefix instead of the whole bucket when you only need a subtree: mc admin heal ALIAS/BUCKET/PREFIX
Known gotchas
mc admin heal only works on MinIO deployments, NOT other S3-compatible services.
Healing is resource intensive; MinIO normally heals automatically on each POST/GET, via the background scanner, and aggressively after drive replacement, so manual heal is often unnecessary.
Requires an alias with admin permissions (root or an admin policy holder).
If the TARGET already has an active heal sequence, the command returns that sequence's status instead of starting a new one.
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