Gene Heskett composed on 2018-08-21 09:08 (UTC-0400):
Now that's a gotcha I did not know. How did it come that this was thought of beeing a good idea?
Yep. Exactly my thought when i spent 3-hours with a server refusing to boot after migration to a new hdd (i used a stretch flash to copy). Who the fuck toughs it was a good idea?!! Why not call it ext5 or ext4a or whatever?!!
+100
Now the question of the day is how the hell do we fix it?
As I implied 24 hours ago in this thread, it doesn't need fixing. Jessie came in between Wheezy and Stretch, a long time (two years?). There are multiple workarounds for those who skipped over Jessie:
1-Format the installation target using Wheezy or Jessie or old Knoppix or old anything in advance of starting the installer. Formatting is an /optional/ part of the installation process (as is partitioning).
2-As Dan wrote, use EXT3 instead of EXT4 (EXT3 can be converted to EXT4 later if desired. AFAIK, the incompatible options will not automatically be added on conversion.)
3-Format with the Stretch installer, but specify to omit the incompatible EXT4 options. I don't which it/they are, but my guess is the only one that is needed is "-O '^64bit'". All my Wheezys were eliminated around the time its support termination was announced, so no practical way here to test.
4-Use XFS instead of EXT4.
5-Use a newer and/or custom kernel in Wheezy. http://ftp5.gwdg.de/pub/linux/debian/debian/pool/main/l/