[Bug 1559915] Re: System appears to try to mount individual ZFS disks when part of zpool

[Janne Savikko]

Um, similar problem fixed for MSDOS extended partitions. Maybe the
problem should be fixed for "Solaris reserved 1" partitions too.

See bug: https://bugs.launchpad.net/ubuntu/+source/os-
prober/+bug/1374759

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Title:
  System appears to try to mount individual ZFS disks when part of zpool

Status in os-prober package in Ubuntu:
  Invalid

Bug description:
  dmesg shows attempts to mount disks that are part of zpools individually. The main part is already mounted as part of the pool. It seems to be trying to mount the reserved partitions.
  I am unsure what package this should belong to. mountall looked to be the most accurate but it could be completely wrong.

  [10391.115002] EXT4-fs (sda9): VFS: Can't find ext4 filesystem
  [10391.116616] EXT4-fs (sda9): VFS: Can't find ext4 filesystem
  [10391.118214] EXT4-fs (sda9): VFS: Can't find ext4 filesystem
  [10391.119825] FAT-fs (sda9): bogus number of reserved sectors
  [10391.119854] FAT-fs (sda9): Can't find a valid FAT filesystem
  [10391.128567] XFS (sda9): Invalid superblock magic number
  [10391.131729] FAT-fs (sda9): bogus number of reserved sectors
  [10391.131760] FAT-fs (sda9): Can't find a valid FAT filesystem
  [10391.136291] VFS: Can't find a Minix filesystem V1 | V2 | V3 on device sda9.
  [10391.152460] hfsplus: unable to find HFS+ superblock
  [10391.154171] qnx4: no qnx4 filesystem (no root dir).
  [10391.155637] ufs: You didn't specify the type of your ufs filesystem

                 mount -t ufs -o
  ufstype=sun|sunx86|44bsd|ufs2|5xbsd|old|hp|nextstep|nextstep-
  cd|openstep ...

                 >>>WARNING<<< Wrong ufstype may corrupt your filesystem, default is ufstype=old
  [10391.155981] ufs: ufs_fill_super(): bad magic number
  [10391.157549] hfs: can't find a HFS filesystem on dev soda

  kim at ra:~$ sudo fdisk -l /dev/sda
  Disk /dev/sda: 3.7 TiB, 4000787030016 bytes, 7814037168 sectors
  Units: sectors of 1 * 512 = 512 bytes
  Sector size (logical/physical): 512 bytes / 4096 bytes
  I/O size (minimum/optimal): 4096 bytes / 4096 bytes
  Disklabel type: gpt
  Disk identifier: 12539B9F-167A-7A41-9CBE-DB553870C53A

  Device          Start        End    Sectors  Size Type
  /dev/sda1        2048 7814019071 7814017024  3.7T Solaris /usr & Apple ZFS
  /dev/sda9  7814019072 7814035455      16384    8M Solaris reserved 1

  kim at ra:~$ lsb_release -rd
  Description:	Ubuntu Xenial Xerus (development branch)
  Release:	16.04

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