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st_san_safe(5)			   OBSOLETED			st_san_safe(5)

NAME
       st_san_safe  -  determine  whether  access to tape device special files
       without the no-rewind-on-close option is allowed (OBSOLETED)

VALUES
   Failsafe
   Default
   Allowed values
   Recommended values
       or

DESCRIPTION
       Note: this tunable is obsoleted and has been renamed to beginning  with
       release HP-UX 11i v3.

       This tunable notifies the tape driver whether it should allow access to
       device special files without the no-rewind-on-close option.  When  this
       tunable	is on the tape driver will fail any open on a tape device spe‐
       cial file without the no-rewind-on-close option (that  is,  or  with  a
       status of

       The  tunable allows the safe sharing of tape devices in SAN tape backup
       solution configurations.	 The disabling of device special files without
       no-rewind-on-close in a SAN tape backup solution configuration prevents
       the accidental sending of a rewind command on close from HP-UX  systems
       via  standard  tape  commands  like  which  would  corrupt  a backup in
       process.

   Who Is Expected to Change This Tunable?
       Anyone.

   Restrictions on Changing
       Changes to this tunable take effect immediately.

   When Should the Tunable Be Turned On?
       This tunable should be turned on if the system is going to be used in a
       SAN tape backup solution configuration.

   What Are the Side Effects of Turning the Tunable On?
       The  tape  driver will fail any open to a tape device special file that
       does not have the no-rewind-on-close  option  with  a  status  of  This
       behavior prevents the usage of any tape device special file without the
       no-rewind-on-close option.

   When Should the Tunable Be Turned Off?
       This tunable should be turned off if the system is not part  of	a  SAN
       tape  backup  solution  configuration  or  the system utilizes will not
       function unless it has access to device special files without  the  no-
       rewind-on-close option.

   What Are the Side Effects of Turning the Tunable Off?
       A  rewind may be issued from this system accidentally on close possibly
       corrupting a backup being issued from another system on the SAN.

   What Other Tunables Should Be Changed at the Same Time?
       None.

WARNINGS
       All HP-UX kernel tunable parameters are release specific.  This parame‐
       ter  may	 be  removed or have its meaning changed in future releases of
       HP-UX.

       Installation of optional kernel software, from HP or other vendors, may
       cause  changes  to  tunable parameter values.  After installation, some
       tunable parameters may no longer be at the default or recommended  val‐
       ues.  For information about the effects of installation on tunable val‐
       ues, consult the documentation for the kernel software being installed.
       For  information	 about	optional  kernel  software  that  was  factory
       installed on your system, see at

AUTHOR
       was developed by Hewlett-Packard.

SEE ALSO
       norewind_close_disabled(5), scsi_tape(7), scsimgr_estape(7).

			   Tunable Kernel Parameters		st_san_safe(5)

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