Software Write-Protect for EF- to RF-Series ISEs
Since the EF/RF ISE does not have a Write-Protect button, the software write-
protect is the primary method for write-protecting an RF.
The software write-protect uses the VMS DCL MOUNT command with the
/NOWRITE qualifier, as shown below,
MOUNT <device_name> <volume_label>/SYSTEM/NOWRITE
where <device_name> is the device name, as shown using the VMS DCL
command SHOW DEVICE DI, and <volume_label> is the volume label for the
device. For example,
$ MOUNT $1$DIA1 OMEGA/SYSTEM/NOWRITE
software write-protects device $1$DIA1.
Dismounting and then remounting the device (without using the /NOWRITE
qualifier) write-enables the device.
Use the VMS DCL command SHOW DEVICE DI to check the protection status of
the drive. A write-protected drive shows a device status of
Mounted wrtlck
. Refer
to your VMS documentation for more information on using the MOUNT utility.
CAUTION
When you dismount and then mount the device again, it will no longer be
write-protected.
Hardware Write-Protect for EF/RF ISEs
The hardware write-protect provides a more permanent write-protection than
the software write-protect. Once you hardware write-protect an RF, it remains
write-protected, regardless of the availability of the operating system or if the
system is powered-down. Also, a hardware write-protect cannot be removed by
using the MOUNT command. In effect, the hardware write-protect provides
the same degree of write-protection available for EF/RF-series ISEs that have a
Write-Protect button.
Operating the System Options 3–5
