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Add back the 4Kn warning 

I still haven't tested this.  It's just a warning anyway.
Richard Laager 2018-10-06 21:34:52 -05:00
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Ubuntu-18.04-Root-on-ZFS.md

@ -5,6 +5,7 @@
### System Requirements ### System Requirements
* [Ubuntu 18.04.1 ("Bionic") Desktop CD](http://releases.ubuntu.com/18.04/ubuntu-18.04.1-desktop-amd64.iso) (*not* any server images) * [Ubuntu 18.04.1 ("Bionic") Desktop CD](http://releases.ubuntu.com/18.04/ubuntu-18.04.1-desktop-amd64.iso) (*not* any server images)
* A drive which presents 512B logical sectors. Installing on a drive which presents 4KiB logical sectors (a “4Kn” drive) should work with UEFI partitioning, but this has not been tested.
Computers that have less than 2 GiB of memory run ZFS slowly. 4 GiB of memory is recommended for normal performance in basic workloads. If you wish to use deduplication, you will need [massive amounts of RAM](http://wiki.freebsd.org/ZFSTuningGuide#Deduplication). Enabling deduplication is a permanent change that cannot be easily reverted. Computers that have less than 2 GiB of memory run ZFS slowly. 4 GiB of memory is recommended for normal performance in basic workloads. If you wish to use deduplication, you will need [massive amounts of RAM](http://wiki.freebsd.org/ZFSTuningGuide#Deduplication). Enabling deduplication is a permanent change that cannot be easily reverted.