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Author Topic: The Film Freeze For a Few Second Ananta Rusdyanto Film Handler Posts: 4 From: Banjanegara, Central Java Registered: Jan 2017 posted 04-28-2017 09:39 AM                     Hi all, I'm a newbie here, i have a problem with my projector. I operate a Barco DP2K-20C projector, the problem is when i play a film, the film freeze for a few time. The duration of freeze is about 10 to 20 seconds. To dix it, i have to raid the storage and re-ingest the film. It does fix the freeze problem, but if i ingest a new film without raid, the film freeze again. Is there anyone had the same problem with me and is there any solution for that?please let know... Thank's  |  IP: Logged Jack Ondracek Film God Posts: 2348 From: Port Orchard, WA, USA Registered: Oct 2002 posted 04-28-2017 09:50 AM                        We had a similar problem this year. However, with the complexities of these machines in mind, the causes of our respective problems may be different. At the start of our season, we had our machines updated, which is customary. Usually, this causes no problems. This year however, we had problems with two projectors, where we'd go into encrypted content with no sound, or no picture, or perhaps both. Power cycling the projector was required to fix the problem. Then, "Beauty and the Beast" froze on us, twice in the same performance. The freeze lasted longer than a few seconds... more like 30, but the show started itself back up on both occasions. Long story short, it turned out that two of our IMBs did not like the latest update. Our service company regressed back to what we had last year and there have been no problems. Dolby wants our IMBs so they can study the problem. However, we're just out of warranty and they aren't offering anything for the opportunity to study our cards... we'd have to pay to replace them. Our service company sees no immediate problem with leaving well enough alone, for now, so the cards are staying put. We also discovered that, coincidentally, we were experiencing progressively-worse failures in 3 of the 9 hard drives in our booth. We replaced all 9, taking the opportunity to install larger drives. So far, no further issues. Barco DP2K-23 and 32B projectors, Doremi servers.  |  IP: Logged Steve Guttag We forgot the crackers Gromit!!! Posts: 12814 From: Annapolis, MD Registered: Dec 1999 posted 04-28-2017 10:30 AM                     By and large, if you are getting image freeze on shows, you are experiencing an underflow issue. That almost always points back to the RAID. So that is where I'd start...are the drives good? Check the SMART logs and see if you have any errors or high reallocated sector counts (over 100). The other thing to note is if the reallocated sector count is climbing at anything higher than 1 every couple of months (if that). If you are getting several a day, that drive is failing. If the drives are good (and the SMART data is not a vindication of the drive but it can point to a bad one), then check on communication between the RAID and the mediblock (Ethernet cables, PCIe cables, etc.). The logs though are your best friend to see what happened. The server should note if the data isn't coming fast enough to keep the should continuous.  |  IP: Logged Marco Giustini Film God Posts: 2713 From: Reading, UK Registered: Nov 2007 posted 04-28-2017 01:01 PM                     (You are in the wrong section, this belongs to Digital Cinema!) What server are you using? What do you mean with "raid the storage", wipe it? As Steve says it's likely an HDD failing. Unfortunately RAID arrays are not always smart enough to prevent that from happening. And - apologies for the bad joke - make sure you're running the latest Java version  |  IP: Logged Carsten Kurz Film God Posts: 4340 From: Cologne, NRW, Germany Registered: Aug 2009 posted 04-28-2017 02:25 PM                     A fried recently had that on a Dolby DSS200, stuttering during a show, fine after a reboot, reoccurred the next day, and so on. I told him to look at the drive LEDs, and the second drive was red. I told him to replace it, and the problem was gone. - Carsten  |  IP: Logged Ananta Rusdyanto Film Handler Posts: 4 From: Banjanegara, Central Java Registered: Jan 2017 posted 04-28-2017 10:02 PM                     Thank's all for the explanation, like i said in the first place, i was a newbie here, so i apologize for my mistake. For the information, we use a barco alchemy server. Like Marco and Carsten said, I think one of the HDD is failing, because i have seen it before that the third HDD is red. After i raid them the HDD led back to normal, but i think the third HDD still failed and didn't run properly. I'll try to change the HDD with the new one and see if the problem fixed with HDD replacement. Thank's all. Best Regards, Ananta Rusdyanto  |  IP: Logged Justin Hamaker Film God Posts: 2253 From: Lakeport, CA USA Registered: Jan 2004 posted 04-28-2017 11:02 PM                        I'm with Steve. Every time I have had issues with shows freezing, it's been because one or more RAID drives were failing. Some times a quick fix is to remove the failing drive from the RAID, but this is only a short term fix.  |  IP: Logged Mark Gulbrandsen Resident Trollmaster Posts: 16657 From: Music City Registered: Jun 99 posted 04-29-2017 10:05 AM                     First note that all server manufacturers consider hard drives an expendable item like xenon lamps are. Only the drive manufacturers warranty usually applies. You can look at the individual drive errors in the S.M.A.R.T. info in the servers Admin panel to determine which drives are failing. If your server is at the 5 year old mark just replacing them is the right thing to do, because they ARE at this point in time going to fail sooner than later. 5 years is pretty good for a set of drives running in RAID where they are constantly checking the data. I change out all drives in a complex at the 5 year mark irregardless and never have any issues this way. I have seen poorer life (2 to 3 years average) out of the 2.5" HGST drives that GDC uses in the PDP-3000, and I am looking at other drive options to use in those. The factory drives are only 5400 RPM and the 7200 rpm HGST drives might be a more reliable option for just a few bucks more because those are also used in IT data servers. Mark  |  IP: Logged Marco Giustini Film God Posts: 2713 From: Reading, UK Registered: Nov 2007 posted 04-30-2017 09:43 AM                     I still do not know what "after I raid them" means.  |  IP: Logged Mark Gulbrandsen Resident Trollmaster Posts: 16657 From: Music City Registered: Jun 99 posted 04-30-2017 11:10 AM                     After I raid them means build the raid....  |  IP: Logged Marco Giustini Film God Posts: 2713 From: Reading, UK Registered: Nov 2007 posted 04-30-2017 05:52 PM                     re-initialise the whole RAID array???  |  IP: Logged Monte L Fullmer Film God Posts: 8367 From: Nampa, Idaho, USA Registered: Nov 2004 posted 05-01-2017 04:06 AM                     When I do Barco maintenance where I have to shut down the GDC then the projector, I also reboot the PSD-3000 while projector is down. We do weekly reboots to eliminate these freezes. Otherwise, I'll get a house where the presentation will start to skip and freeze. Yes, we have those 54K spin drives in our PSD units, but read that these drives are specially made, even though they are not enterprise drives, for cinema use. I always wonder on buffer underrun with the slower spin drives. -Monte  |  IP: Logged Jack Ondracek Film God Posts: 2348 From: Port Orchard, WA, USA Registered: Oct 2002 posted 05-01-2017 04:19 AM                        quote: Marco Giustini re-initialise the whole RAID array??? Simple process, so long as you switch only one drive at a time. not much more difficult to do all 3 at once, though you'll lose your content if you do it that way. In my case, I duplicate my content across all 3 of my servers, so I was able to replace all 3 drives at once. Took 4 or 5 hours to rebuild the RAID, then the rest of the day to re-ingest all the content from one of the other servers. Did all 3 servers over a couple of days that way. Don't know if it would be less time to replace only one drive...  |  IP: Logged Marco Giustini Film God Posts: 2713 From: Reading, UK Registered: Nov 2007 posted 05-01-2017 05:37 AM                     Jack I guess you mean re-build a RAID by removing a drive and re-installing it back in? Just to be clear, this should NEVER be necessary - as you should not reboot a server weekly to avoid freezes. Those are computers, they are supposed to work. If your picture freezes on a regular basis, there is a SW/HW problem which will need to be addressed. Re-building the raid/re-ingesting will probably cause the content to end up on a different part of the platters, which is not affected by the fault. Re-building/re-initialising is not the solution and in the long term will unnecessarily wear those drives out.  |  IP: Logged Steve Guttag We forgot the crackers Gromit!!! Posts: 12814 From: Annapolis, MD Registered: Dec 1999 posted 05-01-2017 07:14 AM                     I would hope that the drives the PSD are using are "enterprise" grade RAID drives. Using desktop/laptop drives would be a recipe for failure. The "mentality" of a desktop/laptop drive over a raid drive is completely different. A raid drive presumes it is part of a raid so if it gets something unreadable, it marks it bad and moves on. A desktop/laptop drive presumes it is the only drive in use and will re-read for some time trying to recover the data and thereby hang a raid that is trying to read new data continuously.  |  IP: Logged

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