How can I downgrade DSM 7 - Synology Community
community.synology.com › enu › forumFeb 15, 2021 · I'm not new to synology or NAS or networking. I've been using a 4 bay I've been using the past 3 years. I bought a DS1621+ second hand locally. It has DSM 7 on it and while the hardware is far superior to my DS918+ it runs WAY slower. By an order of magnitude slower. I'm comfortable SSH'ing in and good in linux.
Downgrade DSM 7.0 : synology
www.reddit.com › comments › iyr2ct6.Use the Synology Assistant to find the machine. 7.Install DSM 6.2.3(At this point, the upgrade will prompt an error, don't worry, because at this point, Telnet port will be opened, and only after this step, can port 23 be opened, repeat point 3, but the user name: root password is: 101-0101). 8.Just install 6.2.3 again.