EVS Xfile Version 2.12 - July 2009 User Manual - Manual (Page 9)

Issue 2.12.D XFile Version 2.12 – User Manual
EVS Broadcast Equipment – July 2009
8
1. Introduction
Digital Archiving on removable media
The XFile has access to all footage recorded on XT[2] 6U, XT[2] 4U, AirBox
and SpotBox servers through the SDTI network. When a clip is created on
one of the servers, a copy is automatically transferred to XFile in the file
format selected in the setup.
This copy is a background process, and has a lower priority on the network
compared to real-time transfers between servers for remote playback, in
order not to disturb the live production in any way. If the network is not very
busy, the transfer to the removable media can be performed several times
faster than real-time. As soon as real-time transfers are required on the
network, the backup process is slowed down to make enough bandwidth
available to guarantee these new requests.
Each clip is saved as a separate file on the removable media, including not
only video, audio and time code information, but also all metadata
associated with that clip: name, descriptors, creation date, original location
(server s/n, register), etc. The transfer between an XT[2] 6U or XT[2] 4U to
the XFile is a data transfer, i.e. no decoding/encoding process takes place
at any point, preserving the original quality of the footage, including super-
motion character if applicable.
The XFile is equipped with 2 removable media, working as mirrored drives:
each clip is automatically saved as 2 separate files on these drives. This
provides a security copy in case of drive failure, and also gives the
possibility to send these 2 drives to 2 different locations/studios after the
show. Each removable media has a capacity of 750 GB or 64 hours of
footage at standard bit-rate. More XFile stations can be inserted on the