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What is TrueNAS writing all the time to disk? (mander.xyz)

submitted 3 months ago* (last edited 3 months ago) by [email protected] to c/[email protected]

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I have a TrueNAS install with SMB turned on and nothing else. Even when it’s idle and nothing is accessing it, there’s constant disk activity. Very low bandwidth, but it’s like some log is in verbose mode.

TrueNAS is installed in a NVMe disk with plenty of room, and there’s only one pool. I’ve checked my snapshot configuration, nothing enabled faster than daily.

What could be causing it? How do I stop it or redirect it to the NVMe drive? I’m willing to create a partition on the NVMe drive if that’s what will do it.

Edit: thanks everyone for all the feedback, I’ll try these out and report back.

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[–] [email protected] 4 points 3 months ago (1 children)

If it’s logs, there’s a package called log2ram - it’s designed for small form factor systems to reduce writes to SD cards but does apply anywhere you want to log but not hit disk immediately. It syncs logs to disk on a regular basis so you don’t lose much if the system crashes.

[–] [email protected] 2 points 3 months ago

Ooh that sounds promising, thank you!