Re: Zfs on NetBSD

[Chavdar Ivanov <ci4ic4%gmail.com@localhost>]

For quite a while I hadn't tried ZFS under NetBSD; it used to crash
for me years ago under load and didn't seem much in the focus of the
development, I think it is fair to say. Following this thread, I
decided to give it a go. There was presently unused 32GB mSATA card in
one of my laptops, which I unmounted; there was no need to clean the
labels at all.
On -current 8.99.51 from a few days ago everything seem to be working
fine for me:
...
modload zfs
modstat zfs
zpool create tank /dev/wd2d
zpool status
df -k
ls -la /tank
zfs create tank/t1
zfs create tank/t2
zfs create tank/t3
df -k
zpool status
zpool scrub tank
zpool status
.....
Some 13GB worth of packages were also tarred over with reasonable speed.

I am not sure if 'zpool scrub' actually does something, though - even
when there is some data on the disk, the subsequent 'zpool status'
claims the scrub has finished straight away:
...
# zpool status tank
  pool: tank
 state: ONLINE
  scan: scrub repaired 0 in 0h0m with 0 errors on Sun Jul 28 13:23:47 2019
config:

        NAME        STATE     READ WRITE CKSUM
        tank        ONLINE       0     0     0
          wd2d      ONLINE       0     0     0

errors: No known data errors
# zpool scrub tank
# zpool status tank
  pool: tank
 state: ONLINE
  scan: scrub repaired 0 in 0h0m with 0 errors on Sun Jul 28 13:32:08 2019
config:

        NAME        STATE     READ WRITE CKSUM
        tank        ONLINE       0     0     0
          wd2d      ONLINE       0     0     0

errors: No known data errors
......

Chavdar

On Sun, 28 Jul 2019 at 07:54, Greg Troxel <gdt%s1.lexort.com@localhost> wrote:
>
> Ron Georgia <netverbs%gmail.com@localhost> writes:
>
> > Yes, I do have /dev/zfs.
> > $ ll /dev/zfs
> > crw-------  1 root  wheel  190, 0 Jul 21 15:23 /dev/zfs
> >
> > I did find the zfs.mod, but get this error when trying to load it.
> > $ sudo modload /stand/amd64/8.1/modules/zfs/zfs.kmod
> > modload: /stand/amd64/8.1/modules/zfs/zfs.kmod: Program version wrong
> >
> > Which makes sense since I am booting kernel 8.99.51 NetBSD 8.99.51 (GENERIC)
> > I did pull down the sets for NetBSD 8.99.51 (GENERIC) and unpacked base.tar.xz and modules.tar.xz. Then I copied the contents of stand to /stand/amd64/8.99.51. (Should I remove /stand/amd64/8.1?)
>
> Basically, you need consistent kernel and modules.  So if you have moved
> to current permanently, yes, delete the 8.1 modules.
>
> Also, to run current zfs, it seems overwhelmingly likely that you want
> to run the zfs userland binaries from current, not from 8.1.
>
> You may want to look at the various schemes for in-place updating, such
> as INSTALL-NetBSD from pkgsrc/sysutils/etcmanage (my take on how to do
> it), and sysupgrade (somebody else's take).
>
> I unpack all the sets except etc/xetc, unpack etc/xetc into
> /usr/netbsd-etc, and then merge the etc changes.
>
> > [ 11951.1654531] WARNING: module error: module `zfs' built for `801000000', system `899005100'
> > [ 12310.9533135] WARNING: module error: module `zfs' built for `801000000', system `899005100'
> > [ 12509.3029082] WARNING: module error: recursive load failed for `zfs' (`solaris' required), error 2
> > [  30.9168505] WARNING: module error: incompatible module class for `zfs' (3 != 2)
> > [  30.9769426] WARNING: module error: incompatible module class for `zfs' (3 != 2)
>
> That really looks like you are loading 8.1 modules.  rm them, and maybe
> you will get a different error.
>


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