RMS_SEQFILE_WBH

   (Alpha and Integrity servers) RMS_SEQFILE_WBH can enable the
   RMS writebehind feature as a system default for any unshared
   sequential disk file if the file is opened for image I/O with
   write access specified. The possible settings are the following:

   Setting        Description

   0 (default)    Do not enable writebehind feature. Preserve prior
                  behavior of using writebehind only if the user
                  requests it by setting RAB$V_WBH in RAB$L_ROP.

   1              Enable writebehind feature as system default,
                  including the allocation of at least two local
                  buffers.

   RMS_SEQFILE_WBH is a DYNAMIC parameter.