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From: Stefan Bethke <stb@lassitu.de>
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Subject: zpool asize problem on 11.0
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Date: Thu, 12 Jan 2017 23:29:56 +0100
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I=E2=80=99ve just created two pools on a freshly partitioned disk, using =
11.0 amd64, and the shift appears to be 9:

# zpool status -v host
  pool: host
 state: ONLINE
status: One or more devices are configured to use a non-native block =
size.
	Expect reduced performance.
action: Replace affected devices with devices that support the
	configured block size, or migrate data to a properly configured
	pool.
  scan: none requested
config:

	NAME         STATE     READ WRITE CKSUM
	host         ONLINE       0     0     0
	  gpt/host0  ONLINE       0     0     0  block size: 512B =
configured, 4096B native

errors: No known data errors

# zdb host | grep ashift
                ashift: 9
                ashift: 9

But:
# sysctl vfs.zfs.min_auto_ashift
vfs.zfs.min_auto_ashift: 12

Of course, I=E2=80=99ve noticed this only after restoring all the =
backups, and getting ready to put the box back into production.

Is this expected behaviour?  I guess there=E2=80=99s no simple fix, and =
I have to start over from scratch?


Stefan

--=20
Stefan Bethke <stb@lassitu.de>   Fon +49 151 14070811