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== What is Greyhole ==
[http://www.greyhole.net/ Greyhole] is Amahi's [[Storage pooling]] technologyof choice. Storage Pooling combines the space of multiple disk drives and makes them look as if they were all part of a single pool of disk space.Greyhole was designed independently of Amahi, however, with feedback and great work, the Greyhole team made it suitable for integration with Amahi.
Specifically, Greyhole:
* Combines the space from multiple drives into a single volume
* Creates multiple copies of files in admin-specified shares
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Recommend you consult [https://github.com/gboudreau/Greyhole/wiki/WhatNotToPutInGreyholeShares what not to put in Greyhole shares] as a precaution when determine determining which shares will be Greyhole enabledto select.
You can add additional drives to your HDA and prepare them for use in Greyhole by following [[Adding_a_second_hard_drive_to_your_HDA|adding a second hard drive to your HDA]] guidance or use the Amahi [https://www.amahi.org/apps/disk-wizard Disk Wizard] (Amahi 8 or greater).
'''NOTE:''' All commands are executed as root user (Fedora) or preceded with sudo (Ubuntu).
== Amahi 7/8 or greater ==
Amahi application [https://www.amahi.org/apps/greyhole-ui Greyhole UI] provides this capability. Refer to the [[Greyhole_UI_App_Transition_Guide|Greyhole UI Application Transition guide]] for details on installation and configuration.
* [https://github.com/gboudreau/Greyhole/wiki Greyhole Wiki]: Provides additional guidance and information.
* [https://github.com/gboudreau/Greyhole/wiki/MigrateFromWHS Widows Windows Home Server (WHS) Drive Extender Migration Guide]: Move from WHS to Amahi and Greyhole.
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