Get FreeBSD 12.2 mfsBSD (because that matches the OS on slocum), burn it to a thumb drive using OSX.
NOTE: the following didn’t work. I wound up not having the right values in /lib and /var/db/
I don’t know what I did wrong, but I did manage to fix them up afterwards. I suspect that I still had zroot/usr mounted and did not notice.
I will keep my notes here for future reference but I warn you that this did not work and further work was required.
[root@mfsbsd ~]# zpool import -R /mnt zroot cannot import 'zroot': pool was previously in use from another system. Last accessed by slocum.int.unixathome.org (hostid=8aa2e4fe) at Sun May 30 17:57:37 2021 The pool can be imported, use 'zpool import -f' to import the pool. [root@mfsbsd ~]# zpool import -fR /mnt zroot [root@mfsbsd ~]#
[root@mfsbsd ~]# zfs list NAME USED AVAIL REFER MOUNTPOINT zroot 13.2G 192G 88K /mnt/zroot zroot/ROOT 305M 192G 88K none zroot/ROOT/default 305M 192G 285M /mnt zroot/tmp 6.88M 192G 160K /mnt/tmp zroot/usr 3.19G 192G 2.36G /mnt/usr zroot/usr/old_local 677M 192G 677M /mnt/usr/old_local zroot/var 9.54G 192G 8.88G /mnt/var zroot/var/audit 88K 192G 88K /mnt/var/audit zroot/var/empty 88K 192G 88K /mnt/var/empty zroot/var/log 172M 192G 24.1M /mnt/var/log zroot/var/tmp 1.75M 192G 844K /mnt/var/tmp [root@mfsbsd ~]#
The wrong system:
[root@mfsbsd ~]# zfs list -o canmount,mounted,mountpoint,name
CANMOUNT MOUNTED MOUNTPOINT NAME
on yes /mnt/zroot zroot
on no none zroot/ROOT
noauto no /mnt zroot/ROOT/default
on yes /mnt/tmp zroot/tmp
on yes /mnt/usr zroot/usr
off no /mnt/usr/old_local zroot/usr/old_local
on yes /mnt/var zroot/var
on yes /mnt/var/audit zroot/var/audit
on yes /mnt/var/empty zroot/var/empty
on yes /mnt/var/log zroot/var/log
on yes /mnt/var/tmp zroot/var/tmp
[root@mfsbsd ~]#
A correct system:
[dan@knew:~] $ zfs list -ro canmount,mounted,mountpoint,name zroot
CANMOUNT MOUNTED MOUNTPOINT NAME
on yes /zroot zroot
on no none zroot/ROOT
on yes / zroot/ROOT/default
on yes /tmp zroot/tmp
off no /usr zroot/usr
on yes /usr/local zroot/usr/local
off no /var zroot/var
on yes /var/audit zroot/var/audit
on yes /var/crash zroot/var/crash
on yes /var/empty zroot/var/empty
on yes /var/log zroot/var/log
on yes /var/mail zroot/var/mail
on yes /var/tmp zroot/var/tmp
[dan@knew:~] $
Notice how zroot/usr and zroot/var differ with CANMOUNT and MOUNTED.
I’m going to fix that on the old system.
[root@mfsbsd ~]# zfs snapshot zroot/usr@for_copy [root@mfsbsd ~]# zfs send zroot/usr@for_copy | zfs recv zroot/NEW_USER
Notice how I create NEW_USER whereas I wanted NEW_USR… that’s just how I pronounce the mount point
[root@mfsbsd /mnt]# ls -l usr total 119 drwxr-xr-x 2 root wheel 526 Apr 12 16:18 bin drwxr-xr-x 4 root wheel 5 Oct 3 2014 home drwxr-xr-x 56 root wheel 342 Dec 8 22:33 include drwxr-xr-x 11 root wheel 730 May 28 17:32 lib drwxr-xr-x 5 root wheel 9 Jun 10 2020 lib32 drwxr-xr-x 5 root wheel 5 Jun 10 2020 libdata drwxr-xr-x 9 root wheel 68 Dec 8 22:34 libexec drwxr-xr-x 20 root wheel 22 May 21 18:57 local drwxr-xr-x 2 root wheel 2 Jun 8 2020 obj drwxr-xr-x 2 root wheel 2 May 3 2013 ports drwxr-xr-x 2 root wheel 307 Feb 24 13:26 sbin drwxr-xr-x 30 root wheel 30 Dec 8 22:33 share drwxr-xr-x 2 root wheel 2 Jun 8 2020 src drwxr-xr-x 15 root wheel 18 Jun 7 2020 tests
[root@mfsbsd /mnt]# mount | grep usr zroot/usr on /rw/mnt/usr (zfs, local, noatime, nfsv4acls) [root@mfsbsd /mnt]# umount zroot/usr [root@mfsbsd /mnt]# ls -l usr total 0
[root@mfsbsd /mnt]# cd /mnt/zroot/NEW_USER [root@mfsbsd /mnt/zroot/NEW_USER]# ls bin home include lib lib32 libdata libexec local obj ports sbin share src tests [root@mfsbsd /mnt/zroot/NEW_USER]# cp -a * /mnt/usr
[root@mfsbsd /mnt/zroot/NEW_USER]# ls /mnt/usr bin home include lib lib32 libdata libexec local obj ports sbin share src tests
Now for /var
[root@mfsbsd /mnt/zroot/NEW_USER]# cd /mnt/var [root@mfsbsd /mnt/var]# ls [root@mfsbsd /mnt/var]#
NOTE what I forgot to do here was umount zroot/usr before I started the copy. I had to come back to that later. When I did, there were three additional messages in the copy output:
cp: utimensat: /mnt/var/empty: Read-only file system cp: chmod: /mnt/var/empty: Read-only file system cp: chflags: /mnt/var/empty: Read-only file system
[root@mfsbsd /mnt/var]# cd /mnt/zroot/NEW_VAR [root@mfsbsd /mnt/zroot/NEW_VAR]# ls account audit cache db heimdal mail named run tmp agentx authpf crash empty lib msgs net-snmp rwho unbound at backups cron games log munin preserve spool yp [root@mfsbsd /mnt/zroot/NEW_VAR]#
[root@mfsbsd /mnt/zroot/NEW_VAR]# cp -a * /mnt/var/ cp: run/devd.pipe is a socket (not copied). cp: run/devd.seqpacket.pipe is a socket (not copied). cp: spool/postfix/private/verify is a socket (not copied). cp: spool/postfix/private/local is a socket (not copied). cp: spool/postfix/private/relay is a socket (not copied). cp: spool/postfix/private/bounce is a socket (not copied). cp: spool/postfix/private/rewrite is a socket (not copied). cp: spool/postfix/private/lmtp is a socket (not copied). cp: spool/postfix/private/proxymap is a socket (not copied). cp: spool/postfix/private/discard is a socket (not copied). cp: spool/postfix/private/error is a socket (not copied). cp: spool/postfix/private/retry is a socket (not copied). cp: spool/postfix/private/proxywrite is a socket (not copied). cp: spool/postfix/private/defer is a socket (not copied). cp: spool/postfix/private/trace is a socket (not copied). cp: spool/postfix/private/smtp is a socket (not copied). cp: spool/postfix/private/tlsmgr is a socket (not copied). cp: spool/postfix/private/virtual is a socket (not copied). cp: spool/postfix/private/scache is a socket (not copied). cp: spool/postfix/private/anvil is a socket (not copied). cp: spool/postfix/public/postlog is a socket (not copied). cp: spool/postfix/public/flush is a socket (not copied). cp: spool/postfix/public/cleanup is a socket (not copied). cp: spool/postfix/public/qmgr is a socket (not copied). cp: spool/postfix/public/showq is a socket (not copied). cp: spool/postfix/public/pickup is a socket (not copied). [root@mfsbsd /mnt/zroot/NEW_VAR]#
[root@mfsbsd /mnt/zroot/NEW_VAR]# zfs list NAME USED AVAIL REFER MOUNTPOINT zroot 24.4G 181G 96K /mnt/zroot zroot/NEW_USER 2.36G 181G 2.36G /mnt/zroot/NEW_USER zroot/NEW_VAR 8.88G 181G 8.88G /mnt/zroot/NEW_VAR zroot/ROOT 305M 181G 88K none zroot/ROOT/default 305M 181G 285M /mnt zroot/tmp 6.88M 181G 160K /mnt/tmp zroot/usr 3.19G 181G 2.36G /mnt/usr zroot/usr/old_local 677M 181G 677M /mnt/usr/old_local zroot/var 9.54G 181G 8.88G /mnt/var zroot/var/audit 88K 181G 88K /mnt/var/audit zroot/var/empty 88K 181G 88K /mnt/var/empty zroot/var/log 172M 181G 24.1M /mnt/var/log zroot/var/tmp 1.75M 181G 844K /mnt/var/tmp
Turn CANMOUNT off for those two filesystems:
[root@mfsbsd /mnt/zroot/NEW_VAR]# zfs set canmount=off zroot/usr zroot/var
[root@mfsbsd /mnt/zroot/NEW_VAR]# zfs list -o canmount,mounted,mountpoint,name
CANMOUNT MOUNTED MOUNTPOINT NAME
on yes /mnt/zroot zroot
on yes /mnt/zroot/NEW_USER zroot/NEW_USER
on yes /mnt/zroot/NEW_VAR zroot/NEW_VAR
on no none zroot/ROOT
noauto no /mnt zroot/ROOT/default
on yes /mnt/tmp zroot/tmp
off no /mnt/usr zroot/usr
off no /mnt/usr/old_local zroot/usr/old_local
off no /mnt/var zroot/var
on no /mnt/var/audit zroot/var/audit
on no /mnt/var/empty zroot/var/empty
on no /mnt/var/log zroot/var/log
on no /mnt/var/tmp zroot/var/tmp
[root@mfsbsd /mnt/zroot/NEW_VAR]#
[root@mfsbsd /]# zpool export zroot [root@mfsbsd /]#
