"Can't open a scratch file" error

Running PSD 12.0.4 (Extended) on a Mac Pro, Mac OS 10.7.3. Plenty of ram; plenty of hard disk space.
I just finished installing a new 1TB drive in one of my bays; I now have (3) 1TB drives total. Initialized the new drive (Mac OS Extended/Journaled), partitioned for Lion, then installed the OS and migrated everything from my primary (boot) drive using Migration Assistant.
After finishing, PSD gives the following error on start: "Could not open a scratch file because the disk is not available". I can command+option on start, select the boot drive as scratch and set the rest to None; that configuration works (and sticks). However, if I try to set scratch volumes to either of my backup volumes, I get the same error. Additionally, Illustrator can't even see the other two volumes in the scratch disk selector (PSD sees them, but won't accept them).
Here's what I've done:
- using simple disk drive names (i.e. WD1, WD2, WD3)
- verified all drives with Disk Utility
- ran drive diagnostics on all drives using SMART Utility (no problems found)
- reset paramter ram (comand+option+p+r on Mac startup)
- repaired permissions (all volumes - no permission errors found)
- reset PSD prefs (command+option+shift on start)
- deactivated/uninstalled/reinstalled PSD
At this point, I'm stumped. This must be related to having installed the new hard drive (everything was fine prior to that), but I don't know what else to try at the moment.
Anyone have any ideas?

Please read my original post (bullet item 6).
General comment - if you aren't going to give the original, detailed description a focused reading, then please don't post a reply. I haven't got the time to answer answered questions.
Also - no bragging intended - I am a Mac guy. I know the platform well, so anyone who wants to offer a Mac-related observation can assume I know what I'm doing and talk on an advanced level.
One additional observation - the problem persists when logged in under a different user account.

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I managed to fix this myself, almost by accident, after failing every method suggested that I came across.
My problem was due to 'read only' access being set to some folders in ~/private/ on my main account, meaning that Photoshop could not create an important, temporary scratch file in this location.
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Hi there! Because the forum you originally posted in is for beginners trying to learn the basics of Photoshop, I moved your question to the Photoshop General Discussion forum, where you'll get more specialized help.
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Hi There,
After looking around for this error, it seems to be related to OS, we would recommend you to contact Apple support for this.
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What do you have here.
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station_two wrote:
OK, here comes the explanation of what the scratch disk does and why it's optimal to have it on a physically separate internal drive (not partition!) other than your boot drive
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Pretty much everyone who's successfully using a computer - Mac and PC users alike - comes to realize after a while that the task of integrating things on their computers and making everything work falls on THEM, not the developers of applications like Adobe. Some applications pose unique challenges, but to think you can just throw up your hands and try to make it someone else's problem when something goes wrong simply isn't a viable strategy. Maybe that's how things should be, but it's not how it is.
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The Program does nor start.
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De: Pat Willener [email protected]
Enviado el: jueves, 17 de octubre de 2013 7:47
Para: Mayte Nieto
Asunto: I can't open a PDF file
Re: I can't open a PDF file
created by Pat Willener <http://forums.adobe.com/people/pwillener> in Adobe Reader - View the full discussion <http://forums.adobe.com/message/5766352#5766352

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"Can't open a scratch file" error

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