Re: ZFS on current vs wedges - best practice?

[Jeff Rizzo <riz%tastylime.net@localhost>]

On 7/19/21 11:50 AM, Frank Kardel wrote:
> Hi Jeff !
>
> Yes, you can use wedge names.
>
> you can configure thm like "zpool create tank raidz2 
> wedges/wedgename-a wedges/wedgename-b wedges/wedgename-c 
> wedges/wedgename-d wedges/wedgename-e"
OK, so I have to specify the names at create time?  If so, I guess I can 
try removing/replacing them.


> For wedges to work you need to start devpubd (/etc/rc.conf: 
> devpubd=YES) before ZFS. Currently devpub start too late with its 
> dependencies.
>
> To start devpubd earlier you can use following dependencies in 
> /etc/rc.d/devpubd
>
> # PROVIDE: devpubd
> # REQUIRE: root
> # BEFORE:  DISKS


Ah, OK.  I had forgotten about devpubd.  Thanks!

> to recover (not tested) you may try:
>
> start devpubd
>
> zpool export tank # you may try without this first
>
> zpool import -d /dev/wedges # list found pools
>
> zpool import -d /dev/wedges -a # imports all found pools


Recovery was as easy as "zpool export tank; zpool import tank" - it 
looks at all dk* devices when importing.  I will try the devpubd stuff 
for avoiding this in the future.

> Use the hints at your own risk. I learned those when we briefly 
> (9.99.85-9.99.86) broke zfs vdev access via symlinks. be sure to use a 
> recent (>2021-07-18) -current kernel in case you are running -current.
>
> Frank

I will update my kernel ASAP.  Thanks a bunch.


+j