My original DS-101g+ is now a 'DS-107', running DSM 2.3-1157 firmware and containing a Samsung HD154UI 1.5TB drive; and - so far so good!
I have started a new thread with the thought that I could try and help other DS-101g+ owners to upgrade their device by placing the process described in other various postings with regard to upgrading a DS-101g+ into one place. I will try and describe the steps which I have taken to upgrade my DS-101g+ to a DS-107 with the latest 2.3 firmware and sporting a 1.5TB drive.
Please note - the following method worked for me, but please don't hold me responsible if it all goes badly wrong for you!
First, let me say that my DS-101g+ was already 'upgraded' to be a DS-106 with 2.0.0731 firmware; the reason I wanted to upgrade from this setup was to install a 1.5TB drive with as few problems as possible. As stated on the Synology website, with regard to the Samsung HD154UI 1.5 TB drive which I was to install:
Before installing this hard drive on DS107, DS107e, DS108j, and DS109j, upgrade the firmware to DSM 2.2-0942 and onward with 1TB or smaller capacity hard drive.
I therefore sought to: upgrade my DS-101g+ to be a DS-107, with firmware higher than 2.2-0942.
The outline of this process was:
1. Upgrade the firmware with a drive of 1TB or smaller capacity.
2. Having upgraded the firmware, to replace the smaller drive with the 1.5TB Samsung drive.
3. Copy over the data from the original drive to the new, larger, drive.