Category Archives: ZFS

FreeNas 11 ZFS Replace Failed Drive

Posted on August 8, 2020 by tim

This documents the steps to replace a failed drive in a mirror configuration in FreeNAS 11.1-U7. This process is really easy with FreeNAS. This scenario is in contrast to replacing a failed drive before it fails (in a Centos “ad-hoc” … Continue reading →

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ZFS replace drive before it fails

Posted on October 12, 2019 by tim

The main Virtual Machine Server was seeing hardware failures and ZFS “scrub not zero bytes”. One of the (cheap) Hitachi Ultrastar 2TB disks was starting to fail, after only 1.5 years. Smartctl was showing 53 recent errors. pool: vmstorage state: … Continue reading →

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ZFS Case Upgrade

Posted on March 15, 2018 by tim

The original ZFS machine has grown a bit over the years. It started with two 2TB hard drives, then got two more, then finally two more. The “little” NZXT case has more than enough drive slots, but this setup violated … Continue reading →

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VirtualBox USB Flash for ZFS

Posted on November 24, 2016 by tim

To set up your USB Flash drives as pass-through in VirtualBox, here is what you can do. Next, plug in your flash drive and record its device. For me, it was /dev/sde. Look in /var/log/syslog, or dmesg output, for the … Continue reading →

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ZFS Flash Drives

Posted on November 20, 2016 by tim

As an experiment, I created a small (8GB) ZFS volume in a mirror configuration using two 8GB USB Flash drives. The purpose was to put “small, but really important things” on this storage system. It actually ended up being two … Continue reading →

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