VOLUME CONTROL STRUCTURES CHECK UTILITY
            Release Level II-3.0.1x/Krivabo-Unisys_Belgium




This application consists of one runfile: VCSCk.Run

Product Name   : Volume Control Structures Check
Supported On   : B24, B26, B27, B28, B38, B39, and all SuperGen hardware
Supported OS   : BTOS II, CTOS I, CTOS II, CTOS III

Description    : Volume Control Structures Check (VCSCk) is a utility which 
                 verifies the control structures of a volume.  When possible 
                 VCSCk will also repair invalid structures.  VCSCk is based on 
                 BACKUP VOLUME II-3.0.1 but the backup part has been removed. 
                 This version of VCSCk supports full verification and repair 
                 of the VHBs (CTOS/XE 3.0 is not yet supported).  The 
                 following features are supported with this release:
                 
                 -  Protected mode compatible
                 
                 -  Uses the message file [Sys]<Sys>VCSCkMsg.bin.  Linked-in 
                    messages are used when this message file does not exist or 
                    when repairing the structures of the system disk.

                 -  Action-Finish may be used at any time.

                 -  Verifies that data can still be read with all heads.

                 -  Full verification of the VHBs with repair when they are 
                    corrupt.

                 -  VHBs can be rebuild from scratch as long as the 
                    fileheaders.sys file is still valid.

                 -  When the working Vhb cannot be found or when rebuilding 
                    the Vhbs (this happens only when they are both lost) VCSCk 
                    re-chains the free file headers.

                 -  When one or both VHBs cannot be read from disk because of 
                    IO errors, VCSCk will "Force Mount" the volume using its 
                    corrected VHB.  This makes it possible to recover data 
                    which would otherwise be lost.
          
                 -  When the control structures cannot be fully repaired, 
                    VCSCk will attempt to bring them into a state which allow 
                    mounting and recovery of the data.
                    e.g. When rebuilding both VHBs from scratch, if the file 
                    header for log.sys cannot be found, its corresponding 
                    fields in the VHBs will be reset and VCSCK will warn you 
                    that the volume cannot be used as a system volume.  
                    However, after running VCSCk the data can be recovered.

                 -  Repair is suppressed when there are files open on the 
                    volume.

Directions/Use : The Volume Control Structures Check utility may be used by 
                 passing paramters to the following field which are described 
                 as follows:
                 
                    Volume or device name 
                    
                    This field is mandatory.  Enter the name of the volume or 
                    device whose control structures you want to verify.
                    
                    [Device password] 
                    This field is optional.  The device password of the device 
                    or volume.
                    
                    [Volume password] 
                    This field is optional.  The volume password of the device 
                    or volume specified in the previous field. 
                    
                    [Log file] 
                    
                    This field is optional.  Enter the name of any desired 
                    file name, GPS Device, spooler queue, [LPT], [PTR]A or 
                    [PTR]B.
                    
                    [Confirm automatic repairs?] 
                    
                    This field is optional.  The default is 'No'.  Enter 'Y' 
                    to confirm all automatic repairs and 'N' if all repairs 
                    can be done without confirmation.  The default is to 
                    prompt for confirmation when automatic repair may be 
                    dangerous.
                    
                    [Suppress repair?] 
                    
                    This field is optional.  Enter 'Y' to suppress repair the 
                    volume control structures are verified but not corrected.
                    The default is to correct bad structures and to write them
                    back to disk with or without confirmation as specified by 
                    the previous parameter.     
                    
                    [Display structures?] 
                    This field is optional.  Enter 'Y' to display the file 
                    structures.

                                 
COMMAND
          
/Volume Control Structures Check
  Volume or device name
  [Device password]
  [Volume password]
  [Log file]
  [Confirm automatic repairs?]
  [Suppress repair?]
  [Display Structures?]