Disabling Quick I/O

If you need to disable the Quick I/O feature, you first need to convert any Quick I/O files back to regular VxFS files. Then, remount the VxFS file system using a special mount option.

Prerequisites

• The file system you are planning to remount must be located in the /etc/filesystems file.

  To disable Quick I/O

1. If the database is running, shut it down.
2. To change Quick I/O files back to regular VxFS files, run the following command from the writable directory where the mkqio.dat list resides:
      $ /opt/VRTSdbed/bin/qio_convertdbfiles -u

   The list of Quick I/O files in the mkqio.dat file is displayed. For example:

   
      .file1::cdev:vxfs: --> file1
      .file2::cdev:vxfs: --> file2
      .file3::cdev:vxfs: --> file3
      .file4::cdev:vxfs: --> file4
      .file5::cdev:vxfs: --> file5

   The qio_convertdbfiles command with the undo option (-u) renames the files from .filename to filename and removes the symbolic link to .filename that was created along with the Quick I/O files.

3. To remount the file system with Quick I/O disabled, use the mount -o noqio command as follows:
      # /opt/VRTS/bin/mount -F vxfs -o remount,noqio /mount_point