Will data read/write operations outside of the task cause data errors or task failures during the execution of a SMART test or a scrub task?

TrueNAS General
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Hello everyone!

Based on posts in the forum, I’ve configured TrueNAS to run a SMART short test once a week, a SMART long test every two weeks, and a scrub every two weeks (all scheduled on different dates).

My TrueNAS system also runs Time Machine backups and data synchronization services, so it’s possible that automatic read/write operations outside the scope of these maintenance tasks may occur while the SMART tests or scrub tasks are running.

I’d like to ask: could such operations cause errors in the SMART tests or scrub tasks, or lead to data read/write errors?

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No :slight_smile: though if you’re really hammering a pool during smart test/scrub, you’ll likely delay the completion of the test/scrub.

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