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Cameraman_2

Joined: 27 Apr 2005
Posts: 5



PostPosted: Wed Apr 27, 2005 9:37 am    Post subject: Color channel Goes Missing Reply with quote

We keep haveing a major problem with a radium color channel will go missing on an image while it is being saved (so we think). We will open up an image and maybe the red channel will be missing or green or blue. Does anybody know why this is happening or if it can be fixed. These images are 16 bit and we save them to a server. The images are usually 8x11.5 @ 600 dpi.
Thanks


Last edited by Cameraman_2 on Wed Apr 27, 2005 3:25 pm; edited 1 time in total
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cbadland

Joined: 19 Jan 2005
Posts: 962



PostPosted: Wed Apr 27, 2005 11:13 am    Post subject: Reply with quote

“…save them to a server.”

Working over a network is not supported by Adobe.
I’m guessing that is where your problem lies. 16-bit, 8 x 11, 600 ppi. You’re talking close to 200 MB files being saved over a network? (larger if layered.) Yeow.

If you keep the file just on one local box, do you still have that problem?

Do all your work locally. Save it locally. And if you have to send it somewhere, zip it first.
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Cameraman_2

Joined: 27 Apr 2005
Posts: 5



PostPosted: Wed Apr 27, 2005 2:36 pm    Post subject: Reply with quote

well the server is in the vault. it holds 2 TB and we don't have that on our computers. Yeah the files are around 400 MB if we are working on 8x11's. We also have 3 people handling the same images. We only have the problem in 1 out of every 20 saves.
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Cameraman_2

Joined: 27 Apr 2005
Posts: 5



PostPosted: Fri Apr 29, 2005 8:48 am    Post subject: Reply with quote

does anyone think it could be a corrupt hard drive since we do have 7 in there?
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cbadland

Joined: 19 Jan 2005
Posts: 962



PostPosted: Fri Apr 29, 2005 10:40 am    Post subject: Reply with quote

Working over a network. Seven hard drives. Three users… lots of variables there.
My money is still on network as cause.
If you don’t get an answer here, try over at Adobe Forums: http://www.adobeforums.com
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BryanDowning

Joined: 05 Jul 2004
Posts: 1554
Location: California, USA


PostPosted: Fri Apr 29, 2005 6:47 pm    Post subject: Reply with quote

You said up to three people are saving these files. Does the problem happen from all three machines, or can you isolate it to just one person?
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Cameraman_2

Joined: 27 Apr 2005
Posts: 5



PostPosted: Fri Apr 29, 2005 7:50 pm    Post subject: Reply with quote

That is what I am trying to figure out. The other day there was only one person working on the images when it happened. Although it only happens on the images with teh most masks which is what he was doing. We decided that we never had the problem when working in 8 bit and we also needed the room since we don't have the tape backup yet and the detail was already there since scanned at 16 bit.

I think it has happened from different users, images one other and I have touched.

This was one of the largest folders we have worked on lately and we had to rescan about 5 images. We didn't have any trouble with the MoMA images that we were working on that was 5 times larger folder than this no. Even those images were 11x14 @ 600 dpi @ 16 bit. So that is why we are wondering if it is the harddrive.

This harddrive has been very well used and do they have a life expectincy. We have filled it up before, several times and keep moving things off of it to others.
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BryanDowning

Joined: 05 Jul 2004
Posts: 1554
Location: California, USA


PostPosted: Fri Apr 29, 2005 8:31 pm    Post subject: Reply with quote

How old is it? Can you hear any clicking from the machine? This doesn't sound like a hard drive problem, because you'd be experiencing problems in other places more frequently. Plus I think if it were a hard drive problem it would be corrupting your files rather than just ditching some of the channels... There may be a limit for the amount of channels when working in 16-bit. Can you narrow it down to a max number of channels?

However, if you really think this may be a hard drive problem: move your data. NOW. Failed hard drives are one of the biggest pains of working with computers, even if you have the data backed up.

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Cameraman_2

Joined: 27 Apr 2005
Posts: 5



PostPosted: Fri Apr 29, 2005 9:27 pm    Post subject: Reply with quote

yeah we didn't think it was a hard drive issue either, boss just wanted me to ask. We only use 3 color channels; red, blue and green. We usually have less then 20 layers and we have had images with over 50 layers. It just seemed to be the ones with the more layers and the ones that had the most work put into them. We would open it up and the picture would be there but it was like it was stepping out of one of the colors and you could see it under the channels that part of it was missing. There would only be about 1/4th of the channel there on all of them that were this way.

You could add like a layer of green if that is what was missing and you could almost get the image back.
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cbadland

Joined: 19 Jan 2005
Posts: 962



PostPosted: Fri Apr 29, 2005 10:58 pm    Post subject: Reply with quote

Can you reproduce this on a local machine?
First I’d try changing your workflow.
Copy the closed PS file from the server to the local workstation. Do your editing, save, then send the closed file back to the server.
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