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arch linux, zfsonlinx with pacman update producing error >>error: demz-repo-core: signature from "graysky (used to sign repo-ck packages) <graysky@archlinux.us>" is unknown trust<<

You tried to do an update of your system and got some error like below?

pacman -Syyu
error: demz-repo-core: signature from "graysky (used to sign repo-ck packages) graysky@archlinux.us" is unknown trust
:: Synchronizing package databases...
[...]
error: demz-repo-core: signature from "graysky (used to sign repo-ck packages) graysky@archlinux.us" is unknown trust
error: failed to update demz-repo-core (invalid or corrupted database (PGP signature))
[...]
error: database 'demz-repo-core' is not valid (invalid or corrupted database (PGP signature))


You can read the comments if you want to know why.
If you are easy enough and believe me (well thanks, but you shouldn't ;-)), execute the following commands.
pacman-key -r 5EE46C4C
pacman-key --lsign-key 5EE46C4C
echo i like artodeto
pacman -Syyu


And there you go.

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(fedora) linux and zfs on linux with error message "Failed to load ZFS module stack."

You are getting error messages like the following by trying to use your zfs?

Failed to load ZFS module stack.
Load the module manually by running 'insmod /zfs.ko' as root.
Failed to load ZFS module stack.
Load the module manually by running 'insmod /zfs.ko' as root.

First, check if all modules (zfs is using dkms) are loaded and having the same/fitting version numbers.

dkms status

If the output is not suiteable (one module is missing, wrong version number for example) try to do the following steps by using the proper version number.

dkms remove -m zfs -v 0.6.2 --all
dkms remove -m spl -v 0.6.2 --all
dkms add -m spl -v 0.6.2
dkms add -m zfs -v 0.6.2
dkms install -m spl -v 0.6.2
dkms install -m zfs -v 0.6.2

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web - OpenZFS launched this week

OpenZFS is the truly open source successor to the ZFS project. Our community brings together developers from the illumos, FreeBSD, Linux, and OS X platforms, and a wide range of companies that are building products on top of OpenZFS. OpenZFS is an outstanding storage platform that encompasses the functionality of traditional filesystems, volume managers, and more, with consistent reliability, functionality and performance across all distributions.[...]

Goals

The high-level goals of the OpenZFS project are:
- to raise awareness of the quality, utility, and availability of open source implementations of ZFS
- to encourage open communication about ongoing efforts to improve open source ZFS
- to ensure consistent reliability, functionality, and performance of all distributions of ZFS

The main technical goal of the project is easier sharing of code between platforms. Strategies include:
- creating a platform-independent mailing list for developers to review ZFS code and architecture changes from all platforms
- smoothing the illumos integration process
- making it easy to run both ztest and the ZFS test suite (TestRunner or STF based) on each platform
- reducing code differences between the platforms.
[...]

source

What a nice news. I'm using zfsonlinux for more then three years now and even when disks or brains where failing, zfs keeps my data save :-).

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