Manipulating a Pool from the Rescue System
We’ve all been there: that moment of panic when a system fails to boot back up. Perhaps there was a glitch with an upgrade. Maybe you’re wondering if you fumble-fingered a typo when you made that last change to loader.conf.
Fortunately, with FreeBSD and its built-in rescue mechanisms it is possible to quickly recover from most scenarios that prevent a system from booting into normal operation. And if you’re using OpenZFS, you can rest assured that your data is intact.
With this article, let’s take a look at some common recovery scenarios.
OpenZFS: Using zpool iostat to monitor pool performance and health
zpool iostat is simply “iostat, but specifically for ZFS.” It is also one of the most essential tools in any serious ZFS storage admin’s toolbox – a tool as flexible as it is insightful. Learn how to use zpool iostat to monitor device latency and individual disks or how to go near-realtime.
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