The container file can now be locked to prevent file deletion: $ LD CONNECT DKA0:[LD]DISK1.DSK LDA1:/LOCK In previous versions the container file could be deleted, but the actual deletion did not take place until the file was disconnected so no harm was done. This is the same bahaviour as what's in place for page-, swap- and dumpfiles. Creation of container files will now make sure that there's room in the fileheader to save metadata like geometry and write-protect status. In previous versions this space was not always created (for example when there was a default acl on the container file's parent directory). This could also result in an SS$_HEADERFULL error when creating the file. A logical name pointing to the LD device can now be specified when the device is connected: $ LD CONNECT DKA0:[LD]DISK1.DSK LDA1: LOGNAME If the optional Logicalname argument is specified a logical name pointing to the device will be created in the process table. Notice that the logical name will not be deassigned when the device is disconnected. Specifying the LD device to connect to is optional, and it works also if an alternate controller is used without a unit number (for example, LDB). So you can let the driver automatically select a unitnumber when it's not specified, so this will work: $ LD CONNECT DISK.DSK LDB The file will then be connected to the next unitnumber on the B controller. Retrieving LD version information can now be done with the LD VERSION command. The qualifier /NOFORCED_ERROR on an LD CONNECT command will allow the LD device to prevent handling of forced errors and return an SS$_UNSUPPORTED error if an attempt is made to create a forced error. This can be used in testing host-based volume shadowing. The qualifier /EXTEND on an LD CREATE command allows for extension of an existing container file. Specify /SIZE=xxx to set the number of blocks to extend the current file to. The control utility will now check if the driver is loaded, as well as that it is installed with the correct privileges. If this is not the case then a message will be given to execute LD$STARTUP.COM.