Technical data

Managing Storage Media
9.5 Mounting Volumes
Table 9–14 MOUNT Command Qualifiers for Mounting Tapes
Qualifier Description
/BLOCKSIZE=n Specifies the block size for the magnetic tape. The range of valid values for n
varies, depending on the density of the volume, whether the data is for input or
output, and whether the operation uses OpenVMS RMS. By default, the system
writes 2048-byte blocks.
/CACHE=TAPE_DATA Requires OPER privilege; enables the write cache for a tape device if the tape
controller supports one. /NOCACHE is the default for mounting tape devices.
You must specify TAPE_DATA to enable write caching. The write buffer stays
enabled even after you dismount the tape.
/FOREIGN Indicates that the volume is not in the standard format used by the operating
system.
/HDR3 Controls whether special header labels are written on a tape volume. This is
the default.
/[NO]MOUNT_
VERIFICATION
Enables or disables the mount verification feature on magnetic tapes. By
default, the mount verification feature is enabled. If a device goes off line
or becomes write-locked, mount verification notifies the operator of the error
condition, and then checks to see that the volume identification before and after
the error condition are identical.
To disable mount verification, enter a command similar to the following:
$ MOUNT/SYSTEM/NOMOUNT_VERIFICATION MUA1: ACCOUNTS_DUE
/OVERRIDE=keyword Inhibits one or more of the access checks that the MOUNT command performs.
For example:
$ MOUNT/OVERRIDE=IDENTIFICATION MFA0:
This command overrides the volume identification field, thus mounting a
magnetic tape on MFA0: without a label specification.
/OWNER_UIC=uic Requests that the specified UIC be assigned ownership of the volume while it
is mounted, overriding the ownership recorded on the volume. Or, if you are
mounting a volume using the /FOREIGN qualifier, requests an owner UIC other
than your current UIC.
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9–32 Managing Storage Media