Unable to connect and recover drives

[Mada]

I updated to an incompatible version and bricked my system (HP Gen8 Microserver).

 

I tried reinstalling with a new bootloader and 6.2.3-25426-3 with my 4x HDD's (full of data) unplugged. I managed to successfully reinstall using a single fresh hard drive and then hot plugged in the 4x HDD's, they are recognised in the storage manager but I wasn't prompted to repair the volumes etc to recover the data.

 

I then restarted the server and was given the option to repair. It gets to 1% and then restarts. I then cannot access the server again through the IP address or find.synology.com. 

 

I'm really at a loss what to try next. My primary concern is retrieving the data on the hard drives (not everything is needed but some of the data is important). I'm happy to reconfigure the synology settings etc.

 

Anything else I can try?