BackBox H4.00 User Manual

Product Description
25 BackBox H4.00 User Manual
Integrity check when a volume is written
When a volume just re-written is unloaded, the TSM data base is queried to verify
the list of TSM objects containing the virtual volume.
If an anomaly is detected, the message #6005 or #6006 is issued in EMS, the
backup should be re-executed, and ETI-NET support contacted.
Notes:
• The NSK backup or TMF dump will most of the time finish without
any NSK error condition.
• The number of TSM objects can be seen in the Volume detail web
page.
Additional functionality
Auto-Scratch Mechanism
When auto-scratch is enabled in the Volume Group configuration, the VT Controller
does not access the image of a virtual volume that must be mounted for write. The
VT Controller rather recreates the image of the volume as an empty scratch. This
mechanism makes it possible to:
For a new backup, avoid restoring the archived image of the expired virtual
volume, just to overwrite its content.
In Windows file Data Stores, instantly ‘move’ the Windows files from an
unavailable path (disconnected, or full) to an available path, or just to a path
chosen for load balancing across several disks.
Note that the volume content is deleted by this operation before any tape data is
read by the NonStop.
Auto-scratch is incompatible with appending a second backup to a volume, or several
tape files on the same volume.
***
The auto-scratch mechanism is active for automatic mounts and for manual loads
initiated through the Pending Mounts section of the Web user interface.