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CentOS/RHEL 7 – No ZFS After Updating the Kernel
Let’s all agree with this fact: ZFS is foreign to Linux. It is not native. You can’t expect that ZFS on Linux will run smoothly as FreeBSD or Solaris. Having using ZFS on Linux since 2013 (and ZFS on...
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How to install ZFS on RHEL / CentOS 7
A friend of mine likes to try ZFS on CentOS 7, therefore I decide to make a guide for him. The following instructions have been well tested on CentOS 7. Before you decide to put ZFS in a production...
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ZFS Cluster: A Network-Based ZFS Implementation
I always like to experimenting the idea of building a ZFS cluster, i.e., it has the robust of the ZFS with the cluster capacity. So I came up a test environment with this prototype. The idea is pretty...
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“ZFS on Linux”: The ZFS modules are not loaded. Try running ‘/sbin/modprobe...
Last Updated: May 10, 2020 This article is based on my experience with CentOS 7. If you are running other Linux distributions, please adjust the commands and package names accordingly (e.g., yum –>...
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ZFS – errors: Permanent errors have been detected in the following files:
I got the following messages today when I inspected my ZFS: errors: Permanent errors have been detected in the following files: /mypool/data/file1.dat /mypool/data/file2.dat /mypool/data/file3.dat...
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[ZFS On Linux]How to Update Linux Kernel without Rebooting the System
As of Jan 2020, I manage 65 Linux + ZFS servers. Normally, I prefer to reboot each server after updating its kernel (according to Ret Hat, most updates are related to security fix). Without ZFS, it is...
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[ZFS On Linux] What to Do When Resilver Takes Very Long
If you check your Zpool health status and you notice an error like the following: sudo zpool status pool: myzpool state: DEGRADED status: One or more devices are faulted in response to persistent...
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[ZFS On Linux Trouble] This pool uses the following feature(s) not supported...
When I rebooted my computer and loaded my ZFS pool today, I got this error message: #sudo zpool import -a This pool uses the following feature(s) not supported by this system:...
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[VM]Virtual Machine – File vs Shared Folder – Performance
I decide to move my Windows 10 system from a physical environment to a Linux based virtual environment. I am curious about what is the I/O performance difference between VM image and Shared Folder. The...
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[ZFS]How to repair a ZFS pool if one device was damaged
Today, I accidentally dd’ed a disk which was part of an active ZFS pool on my test server. I dd’ed the first and the last 10 sectors of the disk. Technically I didn’t lose any data because my ZFS...
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