Bug #1933
Updated by mneumann over 2 years ago
Somehow my 120 GB HAMMER filesystem got into a situation where I couldn't recover (mount r/w) anymore. Mounting it always failed with an "insufficient undo FIFO space" panic. (See screenshots df-hammer{1-4}.png). The only way to recover was to mount read-only and then copy to a new HAMMER filesystem (see hammer-recovery-ro.png). I tried with the most recent version of DragonFly (daily snapshot; i386), but also with a 2.6 version. Any thoughts why this could happen and what to do in this situation? It somehow must have paniced the system while running for the first time, then paniced upon reboot during HAMMER recovery. Screenshots: http://leaf.dragonflybsd.org/~mneumann/hammer_insuff_fifo/