Re: ZFS status

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

On Mon, 24 Feb 2020 at 18:59, Rocky Hotas <rockyhotas%firemail.cc@localhost> wrote:
>
> Hi!
> I was also trying to learn ZFS and still have some doubts. Thanks for
> the suggestions in this whole thread. A couple of questions:
>
> On feb 21 13:40, David Brownlee wrote:
>
> [...]
>
> > - If you make a zfs filesystem on a disklabel partition (eg wd0f) and
> > the disk moves zfs does not seem to be able to find it again.
>
> Do you mean if the disk is removed from the system and then plugged
> there again?
>
> > zfs best practice is to use raw devices, so this shouldn't be an issue
> > for most people
>
> For example, assume that you would like to create a new pool called
> `newpool' using disk /dev/wd0.
> By `using the raw device', are you meaning `zpool create newpool rwd0'?

My two pools:
...
xci # zpool history tank | grep zpool\ create
2019-07-28.13:17:24 zpool create tank /dev/wd2d
xci # zpool history pail | grep zpool\ create
2019-08-09.19:45:49 zpool create -f pail wd1
...

I never specify the raw device; as you see, it works both for the
sheer name - wd1 - or whole disk partition - /dev/wd2d, both cover
whole disks.

I haven't used zfs pool backed by a disklabel slice yet, which was the
warning above.

On the other hand, the latest root-on-zfs VM I setup for testing has
its pool on a gpt partition - /dev/dk2:

dkctl wd0 listwedges
/dev/rwd0: 6 wedges:
dk3: FILLER, 30 blocks at 34, type: ffs
dk0: d6dd2b31-4705-4a83-a239-f80a44bcfa66, 262144 blocks at 64, type: msdos
dk4: F1LLER, 64 blocks at 262208, type: ffs
dk1: boot, 4194304 blocks at 262272, type: ffs
dk2: zfsroot, 58720256 blocks at 4456576, type: ffs
dk5: SWAP2, 3931999 blocks at 63176832, type: ffs

However, within the system itself I can't see the create history, as
it was created outside it and only imported once populated:

zpool history rpool
History for 'rpool':
2020-02-22.16:03:34 zfs set mountpoint=legacy rpool/ROOT
2020-02-22.16:09:17 zpool import -f rpool
2020-02-22.17:11:06 zpool import -f -N rpool
....


>
> Rocky



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