ZFS snapshot - rollback problem

[Christoph Brinkhaus]

On Thu, Sep 10, 2020 at 04:18:39PM +0200, Ludovit Koren wrote:

Dear Ludovit,

I quote the first message because I have a complete different idea.
I hope this is ok.

> Hi,
> 
> I have the following configuration:
> 
> ~>uname -a
> FreeBSD XxX 11.3-STABLE FreeBSD 11.3-STABLE #1 r354607: Mon Nov 11
> 12:19:28 CET 2019     root at jedi:/usr/obj/usr/src/sys/HP  amd64
> ~>zfs list
> NAME              USED  AVAIL  REFER  MOUNTPOINT
> zroot             244G      0  10.7G  /mnt
> zroot/Centos8    6.80G  4.13G  2.67G  -
> zroot/msw7       44.9G  25.8G  19.1G  -
> zroot/swapdisk0  40.8G  20.6G  20.2G  -
> zroot/usr         131G      0  50.9G  /usr
> zroot/usr/home   80.1G      0  80.1G  /usr/home
> zroot/var        9.94G      0  9.94G  /var

Is it possible that the pool has been generated using Centos?
Then the features of the pool might be different to that what
is supported by FreeBSD.

Kind regards,
Christoph

> 
> After zfs snapshot, which I did on the root, I got:
> ~>zfs list -t snapshot
> NAME                     USED  AVAIL  REFER  MOUNTPOINT
> zroot at 200909               1K      -  10.7G  -
> zroot/Centos8 at 200909       1K      -  2.67G  -
> zroot/msw7 at 200909          1K      -  19.1G  -
> zroot/swapdisk0 at 200909      0      -  20.2G  -
> zroot/usr at 200909           1K      -  50.9G  -
> zroot/usr/home at 200909      1K      -  80.1G  -
> zroot/var at 200909           1K      -  9.94G  -
> 
> i.e. whole filesystem is read only. I am not able to do neither
> rollback, nor destroy of the snapshot. Is there any possibility to
> reset the filesystem to the read-write mode?
> 
> 
> Any help is greatly appreciated.
> 
> 
> Regards,
> 
> 
> lk
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