newfs_hammer: WARNING: You have specified an UNDO/REDO FIFO size less than   0.50GB, which may lead to VFS panics
Volume 0 DEVICE /dev/vn0        size  12.00GB
initialize freemap volume 0
initializing the undo map (8 MB)
---------------------------------------------
HAMMER version 7
1 volume total size  12.00GB
root-volume:         /dev/vn0
boot-area-size:       32.00KB
memory-log-size:     256.00KB
undo-buffer-size:      8.00MB
total-pre-allocated:  24.00MB
fsid:                5ee5ed6c-ab9f-11f1-812a-010000000000

NOTE: Please remember that you may have to manually set up a
cron(8) job to prune and reblock the filesystem regularly.
By default, the system automatically runs 'hammer cleanup'
on a nightly basis.  The periodic.conf(5) variable
'daily_clean_hammer_enable' can be unset to disable this.
Also see 'man hammer' and 'man HAMMER' for more information.

WARNING: HAMMER filesystems less than 50GB are not recommended!
You may have to run 'hammer prune-everything' and 'hammer reblock'
quite often, even if using a nohistory mount.
== setup done ==
DF3215 on /mnt/h1 (hammer, noatime, local, nohistory)
== V2 trigger (unprivileged nobody) start: Tue Sep  8 16:07:20 UTC 2026 ==
phase0: REDO enabled on 1 files
round 1/30: 1 MB of redo records laid
round 2/30: 2 MB of redo records laid
round 3/30: 3 MB of redo records laid
round 4/30: 4 MB of redo records laid
round 5/30: 5 MB of redo records laid
round 6/30: 6 MB of redo records laid
round 7/30: 7 MB of redo records laid
round 8/30: 8 MB of redo records laid
round 9/30: 9 MB of redo records laid
round 10/30: 10 MB of redo records laid
round 11/30: 11 MB of redo records laid
round 12/30: 12 MB of redo records laid
round 13/30: 13 MB of redo records laid
round 14/30: 14 MB of redo records laid
round 15/30: 15 MB of redo records laid
round 16/30: 16 MB of redo records laid
round 17/30: 17 MB of redo records laid
round 18/30: 18 MB of redo records laid
round 19/30: 19 MB of redo records laid
round 20/30: 20 MB of redo records laid
round 21/30: 21 MB of redo records laid
round 22/30: 22 MB of redo records laid
round 23/30: 23 MB of redo records laid
round 24/30: 24 MB of redo records laid
round 25/30: 25 MB of redo records laid
round 26/30: 26 MB of redo records laid
round 27/30: 27 MB of redo records laid
round 28/30: 28 MB of redo records laid
round 29/30: 29 MB of redo records laid
round 30/30: 30 MB of redo records laid
done, no panic: total redo laid ~30 MB
== trigger exited rc=0 : Tue Sep  8 16:07:21 UTC 2026 ==
== if you can read this, no panic occurred ==
vn0: MBR magic not found; assume a COMPATIBILITY_SLICE (s0)
HAMMER(DF3215) recovery check seqno=00003fff
HAMMER(DF3215) recovery range 3000000000000000-3000000000000000
HAMMER(DF3215) recovery nexto 3000000000000000 endseqno=00004000
HAMMER(DF3215) mounted clean, no recovery needed