Update: As of version 5.4.3 there is an official P5 add-on package for Synology NAS
Archiware P5 available for Synology
Note: The P5 app for Synology NAS first debuted with P5 v.5.3.3
On the Archiware P5 new-features page there’s a blurb about the Synology NAS integration:
From Version 5.3.3, Archiware P5 supports Synology NAS devices without restrictions.
Synology NAS can serve as a data source or target for P5 Synchronize, P5 Backup and P5 Archive. The Archiware P5 application can now be installed on the Synology NAS itself.
Thanks to the snapshot capability of the DSM platform, powerful enterprise Synology NAS devices can also be used as repository for Backup2Go. This setup opens the possibility of introducing a professional data security solution at an affordable price point.
Let’s look in closer detail how to install Archiware P5 on a new Synology NAS.
For this post I have a new Synology 1515+ NAS, installed with five 6TB hard drives (It is very easy to install hard drives. No tools required). Note: I’ve purchased the NAS with my own money and was not paid to write this article.
At the time of this blog post the latest Synology DSM release is 6.1 and Archiware P5 is at version 5.4.2.
Step 1. Download Synology package from Archiware.com/download
Download Archiware P5 for Synology

Requirements are DSM 5.2+ and Intel x86 64-Bit CPU only. (i.e. Atom but not Marvell).
Step 2. Find and Log into your NAS
Find your new NAS with the Synology Assistant app or use this handy website link:
Find your NAS
I had no luck with the app (it found my existing NAS, but not the new one). Using the website I was able to quickly locate the new NAS that I need to log into and setup. Very nice feature.

Step 3. Install the new DSM
Install or update new software. You will be prompted to go through the initial setup to prepare your new NAS.

Step 4. Set up a new volume
Chose the Btrfs or ext4 filesystem. Btrfs supports snapshots, replication, and much more.

Step 5. Monitor the volume setup
Verifying the hard disks will take a moment. Take a break here.

Step 6. Open Package Center

Step 7. Install manually
Install Archiware P5 by selecting the “install manually” option to upload the awpst542.spk downloaded file from archiware.com

Step 8. Agree to continue.
Load the Synology P5 installer by agreeing to continue with this “unknown” publisher.

Sep 9. Agree to trust the installer

Step 10. Confirm the Install

Step 11. P5 is now running on the Synology NAS.
Hooray! P5 is now installed. Select the app to examine the details.


Step 12. Examine the option to stop or uninstall the P5 application

Step 13. Login to the P5 server running on NAS
To login to P5 open a new tab. Pay attention to the port number: “20,000” (vs 8000 on other platforms such as Solaris, Linux, OSX etc).

Step 14. Set up your NAS as a client on another Server
To test the new Synology 1515+ NAS I then set up the NAS as a client on another P5 server, and set up a P5 Sync job to copy data from server with a ZFS based filesystem to the Synology NAS with a btrfs volume.
Testing: Set up the new client in P5 with a name and IP address, then set up a new sync job with source and destination. Start now. Watch the bits fly through the ether. Be happy.
Step 15. Other things to configure
To make your new NAS is working smoothly don’t forget to set up the email notifications, and set up some AFP, SMB, or NFS shares as required.
Take some time to explore the Package Center app and see what other great applications are offered on the Synology NAS.
Synology makes a great low-cost NAS appliance. For SMB or production setups I would recommend two or more (for redundancy, hot or cold spares, disaster recovery, offsite backups/replication). With P5 installed you can Sync your server data to a NAS for onsite or offsite backups, backup your NAS to tape, or use the NAS for your client workstation backups using Backup2Go. Using the new Btrfs filesystem provides many of the same advances as ZFS, including snapshots and replication, over traditional filesystems such as ext4 and hfs which sadly lack these features.
Conclusion:
The Synology NAS is a great experience. Adding Archiware P5 is a recommended way to include this NAS as part of any good backup, archive or DR (disaster recovery) scenario. Two thumbs up. Way up.
References:
Archiware P5 new features
Synology DSM