Lightroom Catalogue .lrcat and previews on RAM DISK?

Hello,
I copied the lightroom catalaogue and the preview files to a ram disk. Lightroom refuses to open the catalogue. Error message states, that Lightroom couldn't write on that disk. Nevertheless, LR was able to store the raw cache files on that disk (working with a catalogue stored on a real HDD).
Can anybody help?
Thanks
F

Thanks for your response and interest
1.       Files are on the local disk (Windows desktop)
2.       Yes I am the administrator
3.       I believe the Windows Recycle Bin would include files deleted from the desktop
4.       Possibly note sure
5.       Yes enabled

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Samsung HD103UJ
HDTach
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232.6
204.5
Random Access (ms)
12.1
13.7
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Average Write (MB/s)
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Hi,
thank you, it’s done! The Chat helped me! Now I cannot go into this forum anymore with my old password, but that’s not a big problem.
Best wishes,
Christian
Von: JimHess <[email protected]<mailto:[email protected]>>
Antworten an: "[email protected]<mailto:[email protected]>" <[email protected]<mailto:[email protected]>>
Datum: Montag, 20. April 2015 18:38
An: Christian Kogler <[email protected]<mailto:[email protected]>>
Betreff: I have a private Adobe ID and I have a Lightroom Testversion running there! Now my university gave me access to Creative Cloud for Teams and I want to use my Lightroom catalogues with this ID! How can I do this?
I have a private Adobe ID and I have a Lightroom Testversion running there! Now my university gave me access to Creative Cloud for Teams and I want to use my Lightroom catalogues with this ID! How can I do this?
created by JimHess<https://forums.adobe.com/people/JimHess> in Photoshop Lightroom - View the full discussion<https://forums.adobe.com/message/7454915#7454915>

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BrightBluephotograph wrote:
I cannot install lightroom 5 until the upgrades from 4 are on the pc,
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Hi,
I am having a very annoying problem trying to RAM preview in AE CS4 at half res/50% and below.
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Cool, I tried that as well and it worked.
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Thanks a million!

Virtual copies are not synchronized in a second Lightroom catalogue although metadata are written in XMP and synchronization with metadata was selected

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I do not doubt that File Export / File Import will work to transfer the virtual copies.
My question was related to the fact whether the imported folder should not previously exist on the second Mac.
Consider the following situation:
time = 0:
first Mac: folder A is in a first status
second Mac: folder A is in a first status
time = 1:
first Mac: folder A is in a second status, export folder A in second status
second Mac: folder A is in a first status, import folder A in second status
My question is: What happens with these two folder A on the second Mac? Does folder A in the Lightroom catalogue of the second Mac gets overwritten? Do I receive an error message because folder A is already present in the Lightroom catalogue?
I understand your answer that everything will be fine on the second Mac if there is no folder A at all at the second Mac while I import the new folder A. Under this assumption, I can import folder A and it will show the second status. Clearly.
My question is only related to the fact that there is already a folder A on the second Mac, with the same images, but with different metadata and/or virtual copies.

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Hi Everyone,
I'm struggling with some issues regarding previews in lightroom.
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Freddy.

1. ... According to Jeff Schewe in the Luminous Landscape lightroom 3 tutorial there would be an advantage to disregard all your old previews and let lightroom 3 re-render everything. Could someone elaborate why this is the case and how the difference will be noticeable? He mentions something about a new rendering technique and use of color space.
Lightroom 2 used different color spaces for different preview levels: sRGB for low, Adobe RGB for medium an ProPhoto for high quality and 1:1 previews. Lightroom 3 uses Adobe RGB all the time. Plus, LR2 never applied sharpening and NR to standard previews (only to 1:1), LR3 does sometimes.
Also, the preview cache contains some databases, apart from the preview files themselves. These are a sort of directory, or index for the entire cache. They might be corrupted or malformed. Rebuilding them is a good thing sometimes.
I've tested the re-rendering by exporting my entire catalog without previews. Then re-importing it in a new, empty catalog
You might simply copy the catalog. Same result, but faster.
What I've noticed is that the standard preview size in the catalog settings influences the total file size the catalog will have on the hard drive. ... Does lightroom then render out all three of these previews when selecting render 1:1 previews?
Lightroom often builds several levels of previews. Some large images may have not two (standard and 1:1), but 6-7 levels.
To determine what setting to choose for the standard preview size and quality in the catalog settings I need to know what the standard preview is used for. Is it what you see when selecting fit in loupe mode?
Yes.
You must select a size that is egual or larger than you screen width in pixels.
What exactly is lightroom missing here and what does it render out in loupe mode that it doesn't do when rendering 1:1's?
I'm afraid, Lightroom sometimes silently fails to render the requested previews. That's why they are "missing".
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How do I reinstall Lightroom and safely import library and preview data from an older computer?

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It should work. Make sure you are installing the same version. If you continue to have a problem try contacting Adobe Support thru chat:
Serial number and activation chat support (non-CC)
http://helpx.adobe.com/x-productkb/global/service1.html ( http://adobe.ly/1aYjbSC )

How to organise Lightroom catalogue, in such a way that the catalogue can be used on another comput

how to organise(and save) Lightroom catalogue, in such a way that the catalogue can be used on another computer? / so you can see what has been edited etc. /

Yes, but external disks will always be slower than internal drives.
Look into file synchronization software. As long as folder structure is identical inside the two master folders, and drive letters the same, you can keep the two machines fully synchronized very easily, going both ways. The one I use cost about $50 or so.
Use a large capacity 2,5" portable (goes in your pocket) for transport. You need the entire master folder there, but once set up only new or modified files are copied.
The Lightroom catalog can be synchronized with the rest, so that you are working with the same catalog on both machines. This overwrites the catalog with a new copy every time, so a regular backup schedule in addition is a must. OTOH you will have three copies of every file, one always off-site. That's sound backup practice.
Tip: exclude the Lr Previews folder from the synchronization. They are written to disk in such a way that they take an insanely long time to copy. New previews will be built on the receiving machine.

Differences between lrcat and lrdb files with new OS and LR 2?

So I just refurbished my machine by wipping my drives that contain the
operating system (Win XP Pro) and other program files. I did regular backups
of all including the various settings for lightroom and everything else I
could find outside of the backup that LR would do on it's own. Previously,
before this refurbishment, I was using LR 1.4 and just did install LR 2.1. I
hadn't upgraded any of my LR databases as I created a temporary picture
database on another drive just to test drive 2.1. So essentially, I had both
LR 1.4 and LR 2.1 install simutaniously. Didn't have any issues either, but
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files and then brought in some stuff I had backed up before this
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extensions? And when doing this, what is the difference between the lrcat
and the lrdb files? Seems LR 2.1 doesn't contain or create lrdb files. And
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way for me to test and check to make sure I moved the right things into the
right places and that all is working as it should with the proper files? As
an example, all the folders/files that were here "C:\Documents and
Settings\Mark G\Application Data\Adobe\Lightroom" I just copied and wrote
over from my backup prior to the refurbishment and things such as my custom
and downloaded web galleries look fine. Any other thoughts? Sorry for the
long read and thanks for any and all help/input you all can provide.

>And when doing this, what is the difference between the lrcat
>and the lrdb files?
In versions up to and including V1.0, Lightroom catalog files were .lrdb (for Lightroom database). So, if you have already been working with V1.4 you can get rid of any .lrdb files that you may still have.
As regards file locations you could do searches for the following file types:
.lrcat (catalogues and backed-up catalogues)
.lrtemplate (templates and presets)
.agprefs (your preferences file)
previews.ldata (in same folder and with same name as your catalogs)
Lightroom allows you to choose where your catalogs (and associated previews) are stored. It also allows you to specify where Lightroom backs up your catalogs.
Templates and presets are stored in C:\Documents and Settings\YourUsername\Application Data\Adobe\Lightroom
This message gives you a summary of files and it references a Tech Note: http://www.adobeforums.com/webx/.3bc3994c

Can Lightroom render 1:1 Previews when importing my Photos?

Q: Can Lightroom render 1:1 Previews when importing my Photos?
FAQ revised 25 April 2009
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2. Importing your photos with the Standard preview selected within the Import dialog will take longer than 1 above, but on completion Lightroom will already have previews that match the minimum requirement for working in the Library. Assuming that you won't be looking at every image at 100% (i.e 1:1) then this preview size will allow you to quickly review, rate, label, even make quick colour/tone adjustments, etc the photos within the Library module. If you need to see a photo at 100% then Lightroom will render that preview on demand (while it's being rendered you'll see the "Rendering Preview" overlay appear at bottom of preview). Note that when using a 23" or larger monitor it to is best to set the Standard sized previews so that they are rendered at 2048 pixels
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If you're not going to be working on the photos immediately after import but do need to get them into Lightroom as quickly as possible, then the best option would be to choose import option 1. Once the photos have been imported choose either Render Standard-sized Previews or Render 1:1 previews from Library module Library>Previews menu.

When I search these forums for "CFCopyFormattingDescription", I find a bunch of crash reports posted that look almost exactly the same as mine. It appears there's a bug in iPhoto, perhaps when reading metadata from the JPG file (readRawTiffPropsFromPath).
Interestingly, the Preview app can open and display the file just fine. I even opened the inspector and it showed all of the TIFF and exif metadata just fine, no crash. The file also opens just fine on Windows.
Now how do we get the attention of the iPhoto development team so I can send them the photos, have them reproduce the crash, and fix it?

Lightroom Catalogue .lrcat and previews on RAM DISK?

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