Quality and kind of hard disk are not important but it is recommended to use a powerful interface, e.g. eSATA or USB 3.0. Commonly, carriers from the CruDataPort series are used.
The file-systeme is very important. According to DCI specification EXT2 or EXT3 is required. These file systems are supported natively by LINUX.
Third party drivers/emulations are available for MAC and Windows, but we know from some customers that they had problems with the Windows drivers. It is recommended to install a LINUX system either on a remote or virtual system and have it share the mounted DCP via SAMBA.
The time it takes to copy a DCP onto a mobile hard-drive depends on the DCPs size and on the bandwidth. A 90-minute DCP can take up to 200 GB.
It is highly recommend to verify the DCPs integrity. To do that, you can start the DCP validation (included in easyDCP Creator+ and easyDCP Player+) and run a Hash-check (e.g. with MD5) of the DCP before copying to the hard disc. After copying run the Hash-check again. The results of the hash-check must be identical otherwise the DCP may crash.
This extra work is in no relation to later exchange of the DCP in the cinema.
Copying needs to be done independently from the easyDCP application, e.g. with Finder or Windows Explorer. Also professional mass-duplication software is available and convinient for larger copy batch jobs.
Additional hint: Using of Digital Cinema Naming Convention is higly recommend to ease the workflow in the cinema server. Create correct syntax of Digital Cinema Naming Convention is embedded in easyDCP applications.
Imagine the following situation:
To replace certain frames in a DCP or IMF package, just follow these steps:
1. Load the DCP or IMF package in easyDCP Creator+.
2. If you want to create a supplemental package, right-click on a track and choose "Supplemental > Enable for all Tracks":
Info: All tracks should be greyed out now, which means that they are just referenced and not included in the new supplemental package:
3. Move the playhead to the first frame you want to replace (here: frame #280). Then click on the scissors to split the reel/sequence:
Info: A reel should automatically be added to the composition (here: reel #2).
3. Now move the playhead to the next frame after the last frame you want to replace (here: frame #330). Then click on the scissors to split the reel/sequence:
Info: A reel should automatically be added to the composition (here: reel #3).
4. Add your supplemental frames as a new track and drop it onto the reel that contains the frames to be replaced (here: reel #2):
5. Don't forget to rename the composition according to the Digital Cinema Naming Convention (here: creation date and package type "OV" to "VF-1"):
6. Generate the new package.
The result is a DCP or IMF package with a new composition that replaces the desired frames. In case of supplemental, please note that a supplemental package is not self-contained, which means that it must be loaded together with the OV track files in order to play correctly.
Hint: If it becomes necessary to create another Supplemental DCP / IMP, load the Supplemental DCP / IMP that has already been created and proceed on the basis of the previously created Supplementals exactly as you have done before.
For later use in the cinema or Netflix both Supplemental in the correct order are necessary. The naming convention provides for consecutive numbering VF-1, VF-2 and so on.
Please note: Supplemental packages are only supported in easyDCP Creator+.