Re: Set ZFS pool ashift=14 for FreeBSD root pools?

> that ashift=14 will do what?

The zpool(8) command allows -o ashift=14 and properly creates such pool.

After I specified -o ashift=14 in the 'ZFS Pool Options' FreeBSD installed successfully.

... but then zdb(8) does not work because /etc/zfs/zpool.cache is not used on boot/import ... strange.

root@ashift:~ # zdb
libzpool: WARNING: ignoring tunable zfs_arc_max (using 154539520 instead)
cannot open '/etc/zfs/zpool.cache': No such file or directory

... or maybe You know other way to check it?

... and after I created such -o ashift=14 ZFS pool on other system - everything works:

root@freebsd15:~ # zpool list
NAME    SIZE  ALLOC   FREE  CKPOINT  EXPANDSZ   FRAG    CAP  DEDUP    HEALTH  ALTROOT
pool    960M  1.36M   959M        -         -     2%     0%  1.00x    ONLINE  -
zroot  17.5G  1.46G  16.0G        -         -     3%     8%  1.00x    ONLINE  -

root@freebsd15:~ # zdb 2>&1 | grep -E -e ashift -e '^pool:' -e '^zroot:'
pool:
            ashift: 14
zroot:
            ashift: 12

Regards,
vermaden