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While trying to mount/unmount a VDB, the error "wrong fs type, bad option, bad superblock" is raised

Applicable Delphix Versions

  • 5.1
  • 5.0
  • 4.3
  • 4.2
  • 4.1
  • 4.0
  • 3.2


While trying to control a VDB (rewind/refresh/start/stop) an error similar to the following is raised:

ERROR : Details : Trying "mount" using dlpx_mount - stty: standard input: Inappropriate ioctl for device
stty: standard input: Inappropriate ioctl for device;mount: wrong fs type, bad option, bad superblock on,;
missing codepage or helper program, or other error; (for several filesystems (e.g. nfs, cifs) you might
need a /sbin/mount.<type> helper program); In some cases useful info is found in syslog - try; dmesg | tail or so;

This message indicates that either the NFS client software is not installed.


Depending on your flavor of Linux, check to see that the appropriate NFS client software is installed. Run the following command to see if the NFS client utilities are installed:

rpm -q nfs-utils


Install the NFS client utilities using the appropriate commands or utilties. For example:

sudo yum install nfs-utils


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