Uninstall Cygwin and GPFS (Spectrum Scale) manually

[8/23/2023 11:36 PM] Treichel Holger 8BC3

Leong Robert 5USSBV Officially I would uninstall the old version using the referring RSI. I recommend to double check everything has been properly uninstalled. If not the three gpfs packages and cygwin needs to be uninstalled manually. Afterwards the new RSI can be applied. 

The following steps usually work fine to uninstall gpfs and cygwin. 

1. Umount fs from Clipster: #> mmumount [FSNANE]

2. Stop gpfs services: mmshutdown -N [NODENAME]

3. Use other node to remove clipster from cluster: mmdelnode -N [NODENAME]

4. Use Windos "Add/Remove Programs" to uninstall gpfs in the following order

   1. Gskit

   2. Reboot

   3. Gpfs- base

   4. Reboot

   5. Gpfs_license

5. Stop CYGWIN sshd service on Clipster

6. Login as 'root'

7. Remove complete cygwin64 folder using cmd:

   1. Cd to c

   2. takeown /r /d y /f cygwin64

   3. icacls cygwin64 /t /grant Everyone:F

   4. rmdir /s /q cygwin64

8. Remove all cygwin registry entries

9. Logout as root

10. Login as admin

11. Remove 'root' and 'sshd' user

Additional notes and references:

https://superuser.com/questions/110726/how-to-uninstall-reinstall-cygwin-to-use-the-sshd

https://cygwin.fandom.com/wiki/Uninstalling_Cygwin#:~:text=Go%20to%20Control%20Panel%2C%20Category,%22%20%2D%20%22Users%22%20section.