ZFS snapshot - rollback problem

[Ludovit Koren]

On Friday, September 11, 2020, David Christensen <dpchrist at holgerdanske.com>
wrote:

> On 2020-09-10 23:31, Ludovit Koren wrote:
>
>> On Friday, September 11, 2020, David Christensen ... wrote:
>>
>> On 2020-09-10 07:18, Ludovit Koren wrote:
>>>
>>
> ~>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
>>>>
>>>
> I do not understand how your system can work at all if the root filesystem
>>> is mounted at /mnt (?).  Is your FreeBSD running on a different disc?  Do
>>> you have a multiple system disks, multi-boot, etc.?
>>>
>>
>   If you see the time of creation,
>>
>
> I find it very useful to show the date, time, username, hostname, and path
> in my shell prompt.  I use the toor account, the Bash shell, and export PS1
> in ~/.profile:
>
> 2020-09-11 00:31:08 toor at f3 ~
> # grep 'export PS1' .profile
> export PS1='\n\D{%Y-%m-%d %H:%M:%S} '${USER}'@\h \w\n\$ '
>
>
> I think at that time it was a workaround how to install on the zfs.
>>
>
> Please run and post:
>
> # zfs list
>
>
> I did not changed it, since. No the FreeBSD is
>> running from the disk. I have neither multiple system disks, nor
>> multi-boot.
>>
>
> Okay.
>
>
> In the /boot/loader.conf I have vfs.root.mountfrom="zfs.zroot"
>>
>
> Okay.
>
>
> After zfs snapshot, which I did on the root,
>>
>
> Please post your console session.
>>>
>>
> ?
>
>
>   camcontrol devlist
>>
>> <Samsung SSD 840 PRO Series DXM04B0Q>  at scbus0 target 0 lun 0
>> (ada0,pass0)
>> <AHCI SGPIO Enclosure 2.00 0001>   at scbus3 target 0 lun 0 (pass1)
>>
>
> Okay.
>
>
> gpart show
>> =>       34  500118125  ada0  GPT  (238G)
>>           34        128     1  freebsd-boot  (64K)
>>          162  500117997     2  freebsd-zfs  (238G)
>>
>
> Please run and post:
>
> # gpart show -l
>
>
> gpart show -l
=>       34  500118125  ada0  GPT  (238G)
         34        128     1  (null)  (64K)
        162  500117997     2  disk0  (238G)



> Did you partition the disk by hand, use the FreeBSD installer, or
> something else?


 If I remember correctly, using installer


>
>
> mount
>> zroot on / (zfs, local, nfsv4acls)
>> devfs on /dev (devfs, local, multilabel)
>> fdescfs on /dev/fd (fdescfs)
>> procfs on /proc (procfs, local)
>> linprocfs on /compat/linux/proc (linprocfs, local)
>> zroot/usr on /usr (zfs, local, nfsv4acls)
>> zroot/usr/home on /usr/home (zfs, local, nfsv4acls)
>> zroot/var on /var (zfs, local, nfsv4acls)
>> tmpfs on /var (tmpfs, local)
>> map -hosts on /net (autofs)
>> map -media on /media (autofs)
>> tmpfs on /tmp (tmpfs, local)
>>
>
> Okay.  zroot is mounted at /, which makes sense.
>
>
> zpool status
>>    pool: zroot
>>   state: ONLINE
>> status: Some supported features are not enabled on the pool. The pool can
>>          still be used, but some features are unavailable.
>> action: Enable all features using 'zpool upgrade'. Once this is done,
>>          the pool may no longer be accessible by software that does not
>> support
>>          the features. See zpool-features(7) for details.
>>    scan: resilvered 0 in 0 days 00:00:00 with 0 errors on Sat Apr  6
>> 20:39:05 2019
>> config:
>>
>>          NAME         STATE     READ WRITE CKSUM
>>          zroot        ONLINE       0     0     0
>>            gpt/disk0  ONLINE       0     0     0
>>
>> errors: No known data errors
>>
>
> Okay.
>
>
> Please post a console session showing the ZFS snapshot and rollback
> problem(s).
>

zfs rollback zroot/swapdisk0 at 200909
cannot rollback ´zroot/swapdisk0': out of space

zfs rollback zroot at 200909

nothing happens, even if I wait several hours, or it hangs, respectivelly


lk