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Date:      Fri, 26 Dec 2014 17:43:45 -0600
From:      "James R. Van Artsdalen" <james-freebsd-fs2@jrv.org>
To:        freebsd-fs@FreeBSD.org
Subject:   ZFS: FreeBSD 10.1 can't import/mount FreeBSD 9 pool
Message-ID:  <549DF2B1.3030909@jrv.org>

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FreeBSD bigtex.housenet.jrv 10.1-PRERELEASE FreeBSD 10.1-PRERELEASE #2
r273476M: Thu Oct 23 20:39:40 CDT 2014    
james@bigtex.housenet.jrv:/usr/obj/usr/src/sys/GENERIC  amd64

A pool created by a FreeBSD 9 system was imported into FreeBSD 10.1 but
failed to create the recursive mountpoints as shown below.

What's especially interesting is that the free space reported by
zpool(1) and zfs(1) are wildly different, even though there are no
reservations.

Note that I was able to do a zpool upgrade, but that zfs upgrade failed
on the children datasets.

# zpool import SAS01
cannot mount '/SAS01/t03': failed to create mountpoint
cannot mount '/SAS01/t04': failed to create mountpoint
cannot mount '/SAS01/t05': failed to create mountpoint
cannot mount '/SAS01/t06': failed to create mountpoint
cannot mount '/SAS01/t07': failed to create mountpoint
cannot mount '/SAS01/t08': failed to create mountpoint
cannot mount '/SAS01/t12': failed to create mountpoint
cannot mount '/SAS01/t13': failed to create mountpoint
# zpool list SAS01
NAME      SIZE  ALLOC   FREE  EXPANDSZ   FRAG    CAP  DEDUP  HEALTH  ALTROOT
SAS01    43.5T  42.6T   948G         -     0%    97%  1.00x  ONLINE  -
# zfs list -p SAS01
NAME             USED  AVAIL   REFER  MOUNTPOINT
SAS01  33279222543840      0  314496  /SAS01
# zpool get all SAS01
NAME   PROPERTY                       VALUE                          SOURCE
SAS01  size                           43.5T                          -
SAS01  capacity                       97%                            -
SAS01  altroot                        -                              default
SAS01  health                         ONLINE                         -
SAS01  guid                           1341452135                     default
SAS01  version                        -                              default
SAS01  bootfs                         -                              default
SAS01  delegation                     on                             default
SAS01  autoreplace                    off                            default
SAS01  cachefile                      -                              default
SAS01  failmode                       wait                           default
SAS01  listsnapshots                  off                            default
SAS01  autoexpand                     off                            default
SAS01  dedupditto                     0                              default
SAS01  dedupratio                     1.00x                          -
SAS01  free                           948G                           -
SAS01  allocated                      42.6T                          -
SAS01  readonly                       off                            -
SAS01  comment                        -                              default
SAS01  expandsize                     -                              -
SAS01  freeing                        0                              default
SAS01  fragmentation                  0%                             -
SAS01  leaked                         0                              default
SAS01  feature@async_destroy          enabled                        local
SAS01  feature@empty_bpobj            active                         local
SAS01  feature@lz4_compress           active                         local
SAS01  feature@multi_vdev_crash_dump  enabled                        local
SAS01  feature@spacemap_histogram     active                         local
SAS01  feature@enabled_txg            active                         local
SAS01  feature@hole_birth             active                         local
SAS01  feature@extensible_dataset     enabled                        local
SAS01  feature@embedded_data          active                         local
SAS01  feature@bookmarks              enabled                        local
SAS01  feature@filesystem_limits      enabled                        local
# zfs get all SAS01
NAME   PROPERTY              VALUE                  SOURCE
SAS01  type                  filesystem             -
SAS01  creation              Tue Dec 23  2:51 2014  -
SAS01  used                  30.3T                  -
SAS01  available             0                      -
SAS01  referenced            307K                   -
SAS01  compressratio         1.00x                  -
SAS01  mounted               yes                    -
SAS01  quota                 none                   default
SAS01  reservation           none                   default
SAS01  recordsize            128K                   default
SAS01  mountpoint            /SAS01                 default
SAS01  sharenfs              off                    default
SAS01  checksum              on                     default
SAS01  compression           off                    default
SAS01  atime                 on                     default
SAS01  devices               on                     default
SAS01  exec                  on                     default
SAS01  setuid                on                     default
SAS01  readonly              off                    default
SAS01  jailed                off                    default
SAS01  snapdir               hidden                 default
SAS01  aclmode               discard                default
SAS01  aclinherit            restricted             default
SAS01  canmount              on                     default
SAS01  xattr                 off                    temporary
SAS01  copies                1                      default
SAS01  version               5                      -
SAS01  utf8only              off                    -
SAS01  normalization         none                   -
SAS01  casesensitivity       sensitive              -
SAS01  vscan                 off                    default
SAS01  nbmand                off                    default
SAS01  sharesmb              off                    default
SAS01  refquota              none                   default
SAS01  refreservation        none                   default
SAS01  primarycache          all                    default
SAS01  secondarycache        all                    default
SAS01  usedbysnapshots       0                      -
SAS01  usedbydataset         307K                   -
SAS01  usedbychildren        30.3T                  -
SAS01  usedbyrefreservation  0                      -
SAS01  logbias               latency                default
SAS01  dedup                 off                    default
SAS01  mlslabel                                     -
SAS01  sync                  standard               default
SAS01  refcompressratio      1.00x                  -
SAS01  written               307K                   -
SAS01  logicalused           30.2T                  -
SAS01  logicalreferenced     12K                    -
SAS01  volmode               default                default
SAS01  filesystem_limit      none                   default
SAS01  snapshot_limit        none                   default
SAS01  filesystem_count      none                   default
SAS01  snapshot_count        none                   default
SAS01  redundant_metadata    all                    default
# zpool status SAS01
  pool: SAS01
 state: ONLINE
  scan: scrub repaired 0 in 20h26m with 0 errors on Thu Dec 25 20:57:34 2014
config:

        NAME        STATE     READ WRITE CKSUM
        SAS01       ONLINE       0     0     0
          raidz2-0  ONLINE       0     0     0
            da45    ONLINE       0     0     0
            da44    ONLINE       0     0     0
            da47    ONLINE       0     0     0
            da43    ONLINE       0     0     0
            da42    ONLINE       0     0     0
            da46    ONLINE       0     0     0
            da41    ONLINE       0     0     0
            da40    ONLINE       0     0     0

errors: No known data errors
# zfs upgrade -r SAS01
cannot set property for 'SAS01/t03': out of space
cannot set property for 'SAS01/t04': out of space
cannot set property for 'SAS01/t05': out of space
cannot set property for 'SAS01/t06': out of space
cannot set property for 'SAS01/t07': out of space
cannot set property for 'SAS01/t08': out of space
cannot set property for 'SAS01/t12': out of space
cannot set property for 'SAS01/t13': out of space
0 filesystems upgraded
1 filesystems already at this version
#
       



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