Film-Tech Forum ARCHIVE: Encrypted CPLs won't play after RAID drive replacement on Doremi/Dolby DCP2000

This is topic Encrypted CPLs won't play after RAID drive replacement on Doremi/Dolby DCP2000 in forum Digital Cinema Forum at Film-Tech Forum ARCHIVE.

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Posted by Leo Enticknap (Member # 534) on 10-16-2019, 06:15 AM:

I'm guessing that many of you will be well aware of this, but just in case some aren't, I thought it would be worth writing up.

Yesterday, I replaced all the RAID drives in two very early DCP2000s and two DCP-2K4s in an arthouse 4-plex. The manufacture date on the drives that were retired from service was 2007 for the ones in the DCP2000s, and 2011/12 for the DCP-2K4 drives, so they certainly had their money's worth out of them! The two DCP2000s both use the original Dolphin media block connected to Barco DP2000s; one of the 2K4s feeds an NEC NC1600 and the other one (via an Enigma board, obviously) an NEC NC2000. All the servers and media blocks were running the current software and firmware versions (2.8.25 with hotfix 1.0.0 for the servers, and whatever the current one on Dolby's FTP site was for the Dolphins).

After the drives were all replaced with new ones, the RAIDs reinitialized and content reingested, the two 2K4s worked fine, without any problems or glitches. The 2000s, however, would not play encrypted content. The CPL (left) pane of Cinelister showed the DCPs with valid KDMs with a green blob next to them, but that blob was red on the SPL pane (right), and the SPL stopped playing when it arrived at the encrypted CPL.

What eventually fixed it was deleting the projector's entry in the device manager, rebooting the server, then recreating it. My guess is that the server stores a TLS certificate, or something of that sort, on the RAID rather than the boot flash drive, and that by nuking the RAID and starting over (which is what replacing all the drives in one fell swoop had the effect of doing), I deleted it, meaning that I had to force the server to download it from the projector again. The reason I figured that this was the problem was that while troubleshooting, I pressed the "test" button on the projector's device manager entry, and it failed - no communication. After deleting, rebooting, and recreating, the test passed and encrypted CPLs played OK.

Apologies for whom this is old news, but thought it would be worth posting this in case someone Google searches in future and it saves them half an hour.

Posted by Marcel Birgelen (Member # 6801) on 10-16-2019, 11:19 AM:

Maybe this is the behavior since later software versions? I remember me replacing all RAID drives in a DCP2000 before without needing to divorce from and re-marry the projector to the server... but I might be daydreaming...

Posted by Dave Macaulay (Member # 813) on 10-16-2019, 01:08 PM:

I have had this happen once, also on a series 1 projector. I didn't really think about it at the time, just another weirdness among the many weirdnesses with digital cinema systems. I changed the server configuration to try it on a different (S2) projector, it worked, and when changed back it worked fine with the original one.

Posted by Carsten Kurz (Member # 5396) on 10-16-2019, 06:15 PM:

I did a lot of RAID swaps/extensions recently on DCP-4K's. Nether had that issue.

Wouldn't Doremi/Dolby have a technote about this? There's loads of material on RAID rebuild and such.

- Carsten